{"product_id":"platinum-joint-sealing-tape-double-sided-butyl-cavity-membrane","title":"Platinum Joint Sealing Membrane Tape","description":"\u003cp\u003ePlatinum Joint Sealing Tape is a double-sided self-adhesive butyl sealing tape used within the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platinum-basement-waterproofing\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum Waterproof Membrane System\u003c\/strong\u003e\u003c\/a\u003e to join adjacent sheets of cavity drain waterproof membrane into one continuous waterproof layer.\u003c\/p\u003e\n\u003cp\u003eIt is the primary membrane jointing tape used at overlaps, flanges and stud-into-stud laps, forming a watertight bond between one sheet and the next. Manufactured from a durable butyl rubber compound, Platinum Joint Sealing Tape provides strong adhesion, flexibility and resistance to water, air and chemical exposure.\u003c\/p\u003e\n\u003cp\u003eSupplied in \u003cstrong\u003e30mm wide rolls\u003c\/strong\u003e in either \u003cstrong\u003e30m or 15m lengths\u003c\/strong\u003e, with a \u003cstrong\u003e1.5mm thickness\u003c\/strong\u003e, it is designed to sit within the membrane overlap rather than cover the joint from the surface. It can also be used with compatible \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/newton-waterproofing-membranes\" target=\"_blank\"\u003e\u003cstrong\u003eNewton CDM\u003c\/strong\u003e\u003c\/a\u003e, \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platon-membranes\" target=\"_blank\"\u003ePlaton\u003c\/a\u003e \u003c\/strong\u003eand \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/wykamol-membrane\" target=\"_blank\"\u003eWykamol\u003c\/a\u003e \u003c\/strong\u003ewaterproof membrane systems where a double-sided butyl jointing tape is required.\u003c\/p\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features of Platinum Joint Sealing Tape\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cbr\u003e✔️ Double-sided butyl tape seals membrane overlaps, flanges and stud-to-stud laps from inside the joint.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ Creates watertight sheet-to-sheet connections for one continuous waterproof layer across cavity drain membrane systems.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ Flexible butyl rubber provides strong adhesion with resistance to water, air and chemical exposure.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ Narrow 30mm profile sits within the overlap, keeping the joint sealed without surface covering.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ Compatible with \u003cstrong\u003ePlatinum\u003c\/strong\u003e, \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/newton-waterproofing-membranes\" target=\"_blank\"\u003e\u003cstrong\u003eNewton CDM\u003c\/strong\u003e\u003c\/a\u003e, \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platon-membranes\" target=\"_blank\"\u003ePlaton\u003c\/a\u003e \u003c\/strong\u003eand \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/wykamol-membrane\" target=\"_blank\"\u003eWykamol\u003c\/a\u003e \u003c\/strong\u003esystems where double-sided jointing tape is required.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"color: rgb(88, 88, 88);\"\u003eWatertight Membrane Jointing For Basement Waterproofing\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003ePlatinum Joint Sealing Tape is a specialist double-sided membrane jointing tape used to create watertight connections between adjacent sheets of cavity drain waterproof membrane. In below-ground waterproofing systems, the membrane sheets must be securely joined so the completed installation performs as one continuous waterproofing layer, rather than a series of separate panels. Positioned within the overlap between two membrane sheets, the tape bonds the adjoining surfaces directly together and seals the joint from inside the lap. This makes it a key accessory within \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platinum-basement-waterproofing\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum waterproof membrane\u003c\/strong\u003e\u003c\/a\u003e installations, especially at membrane flanges, sheet overlaps and stud-into-stud laps where water must not be allowed to track through the joint line.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"color: rgb(88, 88, 88);\"\u003eFlexible Butyl Rubber For Secure Sheet-To-Sheet Sealing\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eManufactured from a durable butyl rubber compound, Platinum Joint Sealing Tape combines strong adhesion with long-term flexibility and resistance to water, air and chemical exposure. Butyl rubber is widely used in below-ground waterproofing because it remains flexible while maintaining a reliable seal in damp and demanding environments. The double-sided self-adhesive construction allows two membrane surfaces to be bonded together without a separate adhesive, creating a direct sheet-to-sheet seal inside the overlap. Unlike surface-applied waterproofing tapes, this product is designed to become part of the lap itself, conforming closely to membrane flanges, studded profiles and slight surface irregularities to maintain consistent contact along the full joint length.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"color: rgb(88, 88, 88);\"\u003e30mm Internal Jointing Tape For Laps, Flanges And Details\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003ePlatinum Joint Sealing Tape is supplied in 30mm wide rolls, available in 15m or 30m lengths, with a 1.5mm thickness. The narrow format reflects its purpose as an internal jointing tape for membrane laps and overlaps, rather than a wider corner tape or surface sealing tape. It is used primarily for overlapping sections of waterproof membrane, including flange joints and stud-into-stud laps, but is also suitable for abutting joints and areas where the membrane has been cut or shaped to create an overlap. Typical detailing areas include corners, reveals, wall-to-floor junctions and service penetrations around pipes, cables, conduits and other protrusions through the membrane.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"color: rgb(88, 88, 88);\"\u003eCompatible With Platinum, Newton, Platon And Wykamol Systems\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eWhen used correctly, Platinum Joint Sealing Tape provides a practical and consistent method of sealing cavity drain membrane joints in basement waterproofing and below-ground membrane installations. It is designed for the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platinum-basement-waterproofing\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum Waterproof Membrane System\u003c\/strong\u003e\u003c\/a\u003e but can also be used with compatible \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/newton-waterproofing-membranes\" target=\"_blank\"\u003e\u003cstrong\u003eNewton CDM\u003c\/strong\u003e\u003c\/a\u003e, \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platon-membranes\" target=\"_blank\"\u003ePlaton\u003c\/a\u003e \u003c\/strong\u003eand \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/wykamol-membrane\" target=\"_blank\"\u003eWykamol\u003c\/a\u003e \u003c\/strong\u003ewaterproof membrane systems where a double-sided butyl jointing tape is required. Where the tape is used on meshed membranes and a direct plaster or render finish is planned over the joint, \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/products\/mesh-membrane-tape\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum Mesh Tape\u003c\/strong\u003e\u003c\/a\u003e should be used above the sealed area to reinstate the surface key. Platinum Joint Sealing Tape itself is not a plasterable or renderable surface, as its role is to create the watertight bond between membrane sheets.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .pc-platinum-waterseal-joint-tape-table-wrap {\n    width: 100%;\n    max-width: 100%;\n    overflow-x: auto;\n    -webkit-overflow-scrolling: touch;\n    margin: 24px 0;\n  }\n\n  .pc-platinum-waterseal-joint-tape-table {\n    width: 100%;\n    min-width: 620px;\n    table-layout: fixed;\n    border-collapse: collapse;\n    font-family: inherit;\n    font-size: 16px;\n    line-height: 1.25;\n    color: #111;\n    background: #fff;\n  }\n\n  .pc-platinum-waterseal-joint-tape-table col:nth-child(1) { width: 38%; }\n  .pc-platinum-waterseal-joint-tape-table col:nth-child(2) { width: 62%; }\n\n  .pc-platinum-waterseal-joint-tape-table th,\n  .pc-platinum-waterseal-joint-tape-table td {\n    border: 5px solid #fff;\n    padding: 8px 12px;\n    vertical-align: middle;\n    font-weight: 400;\n  }\n\n  .pc-platinum-waterseal-joint-tape-table .pc-main-title th {\n    background: #7f7f7f;\n    color: #fff;\n    text-align: center;\n    text-transform: uppercase;\n    font-size: 30px;\n    line-height: 1.15;\n    font-weight: 700;\n    letter-spacing: 0.2px;\n    padding: 12px 10px;\n  }\n\n  .pc-platinum-waterseal-joint-tape-table .pc-column-head th {\n    background: #a6a6a6;\n    color: #111;\n    font-size: 16px;\n    line-height: 1.2;\n    font-weight: 700;\n    text-align: left;\n    padding: 10px 12px;\n  }\n\n  .pc-platinum-waterseal-joint-tape-table .pc-data-row td {\n    background: #fff;\n    text-align: left;\n  }\n\n  .pc-platinum-waterseal-joint-tape-table .pc-data-row.pc-grey td {\n    background: #d9d9d9;\n  }\n\n  .pc-platinum-waterseal-joint-tape-table .pc-spec-cell {\n    font-weight: 700;\n  }\n\n  @media screen and (max-width: 767px) {\n    .pc-platinum-waterseal-joint-tape-table {\n      font-size: 14px;\n      min-width: 600px;\n    }\n\n    .pc-platinum-waterseal-joint-tape-table th,\n    .pc-platinum-waterseal-joint-tape-table td {\n      padding: 7px 9px;\n      border-width: 4px;\n    }\n\n    .pc-platinum-waterseal-joint-tape-table .pc-main-title th {\n      font-size: 24px;\n      padding: 10px 8px;\n    }\n\n    .pc-platinum-waterseal-joint-tape-table .pc-column-head th {\n      font-size: 15px;\n      padding: 9px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"pc-platinum-waterseal-joint-tape-table-wrap\"\u003e\n\u003ctable aria-label=\"Platinum Waterseal Joint Sealing Tape Technical Information\" class=\"pc-platinum-waterseal-joint-tape-table\"\u003e\n\u003ccolgroup\u003e \u003ccol\u003e \u003ccol\u003e \u003c\/colgroup\u003e\n\u003cthead\u003e\n\u003ctr class=\"pc-main-title\"\u003e\n\u003cth colspan=\"2\"\u003eTechnical Information\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-column-head\"\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"pc-data-row\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eTape Type\u003c\/td\u003e\n\u003ctd\u003eDouble-sided butyl tape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row pc-grey\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eButyl rubber compound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eTape Width\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row pc-grey\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eAvailable Lengths\u003c\/td\u003e\n\u003ctd\u003e15m and 30m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row pc-grey\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eMain Use\u003c\/td\u003e\n\u003ctd\u003eMembrane sheet jointing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eTape Position\u003c\/td\u003e\n\u003ctd\u003eInside membrane overlaps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row pc-grey\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eSuitable Joints\u003c\/td\u003e\n\u003ctd\u003eLaps, flanges, abutting joints\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eCompatible Systems\u003c\/td\u003e\n\u003ctd\u003ePlatinum, Newton, Platon, Wykamol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row pc-grey\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eApplication Area\u003c\/td\u003e\n\u003ctd\u003eBelow-ground waterproofing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eSeal Function\u003c\/td\u003e\n\u003ctd\u003eBonds membrane to membrane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row pc-grey\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eSurface Requirement\u003c\/td\u003e\n\u003ctd\u003eClean, dry membrane surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eApplication Aid\u003c\/td\u003e\n\u003ctd\u003eHeat gun if required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row pc-grey\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eFinish Limitation\u003c\/td\u003e\n\u003ctd\u003eNot a plaster key\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eOver-Tape Option\u003c\/td\u003e\n\u003ctd\u003ePlatinum Mesh Tape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Benefits\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDouble-Sided Membrane Jointing: \u003c\/strong\u003ePlatinum Joint Sealing Tape bonds two membrane surfaces directly together within the overlap, creating a sealed sheet-to-sheet connection rather than simply covering the joint from the exposed face.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrimary Jointing Tape For Platinum Systems: \u003c\/strong\u003eDesigned for use within the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platinum-basement-waterproofing\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum Waterproof Membrane System\u003c\/strong\u003e\u003c\/a\u003e, it provides the main jointing method for cavity drain membrane sheets in basement waterproofing and below-ground membrane installations.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWatertight Overlap Sealing:\u003c\/strong\u003e The butyl adhesive seals membrane overlaps, flange joints and stud-into-stud laps, helping reduce the risk of water tracking through the joint line and supporting the waterproofing continuity of the system.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDurable Butyl Rubber Construction:\u003c\/strong\u003e Manufactured from butyl rubber, the tape provides strong adhesion, flexibility and resistance to water, air and chemical exposure, making it suitable for damp, humid and below-ground waterproofing environments\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible With Leading Membrane Systems:\u003c\/strong\u003e Platinum Joint Sealing Tape can also be used with compatible \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/newton-waterproofing-membranes\" target=\"_blank\"\u003e\u003cstrong\u003eNewton CDM\u003c\/strong\u003e\u003c\/a\u003e, \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platon-membranes\" target=\"_blank\"\u003ePlaton\u003c\/a\u003e \u003c\/strong\u003eand \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/wykamol-membrane\" target=\"_blank\"\u003eWykamol\u003c\/a\u003e \u003c\/strong\u003ewaterproof membrane systems, making it a practical jointing tape for installers working across different cavity drain membrane ranges.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCorrect Format For Internal Jointing:\u003c\/strong\u003e At 30mm wide and 1.5mm thick, the tape is designed to sit neatly inside the membrane overlap, providing a controlled jointing detail without unnecessarily spanning across the face of the membrane.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConforms To Membrane Profiles:\u003c\/strong\u003e The flexible butyl compound allows the tape to follow membrane flanges, laps and studded profiles, helping achieve close contact between the sheets and a consistent bond along the full joint length.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable In Two Roll Lengths: \u003c\/strong\u003eSupplied in 15m and 30m roll lengths, Platinum Joint Sealing Tape allows installers to select the most suitable quantity for smaller detailing tasks or larger waterproof membrane installations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTypical Applications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMembrane Overlap Sealing: \u003c\/strong\u003ePlatinum Joint Sealing Tape is used between overlapping sheets of cavity drain waterproof membrane to form a watertight bond along the lap, helping maintain waterproofing continuity across walls, floors and other membrane areas.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFlange Joint Sealing: \u003c\/strong\u003eSuitable for sealing membrane flange joints where adjacent sheets meet, ensuring the connection between the sheets is bonded and sealed as part of the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platinum-basement-waterproofing\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum waterproof membrane system\u003c\/strong\u003e\u003c\/a\u003e.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStud-Into-Stud Lap Jointing: \u003c\/strong\u003eUsed where one studded membrane sheet is nested into another, allowing the double-sided butyl tape to bond the overlapping surfaces together and form a secure sealed lap.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAbutting Membrane Joints: \u003c\/strong\u003eSuitable as part of the sealing detail for abutting membrane joints where sheets are brought together and require a watertight connection to reduce the risk of water movement through the joint.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCorners And Reveals: \u003c\/strong\u003eUsed where membrane has been cut, shaped or overlapped around corners, reveals, returns or changes in direction, helping seal the created joint and maintain the waterproof layer.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWall-To-Floor Junction Details:\u003c\/strong\u003e Suitable for areas where wall and floor membranes are overlapped or connected, helping form a sealed joint within a complete basement waterproofing or cavity drain membrane installation.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProtrusions And Service Detailing: \u003c\/strong\u003eUsed around pipes, cables, conduits and structural protrusions where the membrane has been cut or formed, allowing the overlap or joint around the detail to be sealed correctly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eFAQ's\u003c\/h5\u003e\n\u003ch3\u003eQ) What is Platinum Joint Sealing Tape used for?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape is used to join adjacent sheets of cavity drain waterproof membrane into one continuous waterproof layer. It is a double-sided self-adhesive butyl tape designed to sit inside membrane overlaps, flanges and stud-into-stud laps, bonding one membrane sheet directly to the next. This is important in basement waterproofing and below-ground membrane systems because the installation must work as one connected layer, not as separate sheets with weak joint lines. Platinum Joint Sealing Tape seals the joint from within the lap, helping prevent water tracking through the overlap and supporting the long-term integrity of the complete waterproof membrane system.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) How does Platinum Joint Sealing Tape work?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape works by bonding two membrane surfaces together from inside the overlap. The tape is placed between the adjoining sheets, usually along a membrane flange, lap or stud-into-stud joint, then the second membrane surface is pressed firmly against the exposed adhesive face. Because the tape is double-sided, it grips both sheets and creates a watertight sheet-to-sheet seal along the joint line. This internal sealing method is different from covering the joint from the surface. The butyl rubber compound remains flexible and adhesive, allowing it to conform to membrane profiles, flanges and studded surfaces for close contact along the full joint length.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) Where should Platinum Joint Sealing Tape be used?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape should be used wherever waterproof membrane sheets need to be joined together with a sealed internal overlap. Typical uses include membrane laps, flange joints, stud-into-stud laps, abutting joints, corners, reveals and wall-to-floor transition details. It can also be used where membranes have been cut, shaped or overlapped around pipes, cables, conduits, protrusions or service entries, provided a suitable lap or joint can be formed. Its purpose is to maintain waterproofing continuity between adjoining membrane sheets. It is especially useful in basement waterproofing, below-ground waterproofing and cavity drain membrane installations where joint sealing is essential to system performance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) What waterproof membrane systems can Platinum Joint Sealing Tape be used with?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape is designed for use within the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platinum-basement-waterproofing\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum Waterproof Membrane System\u003c\/strong\u003e\u003c\/a\u003e, where it provides the primary jointing method for cavity drain membrane sheets. It can also be used with compatible \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/newton-waterproofing-membranes\" target=\"_blank\"\u003e\u003cstrong\u003eNewton CDM\u003c\/strong\u003e\u003c\/a\u003e, \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platon-membranes\" target=\"_blank\"\u003ePlaton\u003c\/a\u003e \u003c\/strong\u003eand \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/wykamol-membrane\" target=\"_blank\"\u003eWykamol\u003c\/a\u003e \u003c\/strong\u003ewaterproof membrane systems where a double-sided butyl jointing tape is required. This makes it a practical option for installers working across different cavity drain membrane ranges, especially when a reliable sheet-to-sheet bond is needed within an overlap. Compatibility should still be considered against the specific membrane surface, system design and site conditions. The tape must be applied to clean, dry membrane surfaces and pressed firmly to form a dependable seal.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) What size is Platinum Joint Sealing Tape?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape is supplied in 30mm wide rolls, available in either 15m or 30m lengths, with a thickness of 1.5mm. The 30mm width is deliberate because the tape is designed for internal jointing within membrane overlaps, rather than wide surface sealing across the face of a joint. The 1.5mm butyl thickness gives the tape enough body to compress and conform to membrane profiles, helping it maintain close contact between adjoining sheets. The 15m roll is useful for smaller detailing tasks or local repairs, while the 30m roll is better suited to larger waterproof membrane installations where multiple joints, laps and transitions need sealing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) How do you apply Platinum Joint Sealing Tape?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape should be applied between clean, dry membrane surfaces. The tape is positioned along the overlap, flange or stud-into-stud lap, with the backing paper removed gradually as the tape is laid into place. Once the tape is correctly aligned, the adjoining membrane sheet should be pressed firmly onto it to close the joint and complete the bond. Good pressure is important because the butyl needs full contact with both membrane surfaces along the entire joint. In cold, damp or humid site conditions, a heat gun is often used carefully to dry the membrane surface and assist adhesion before the joint is sealed.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) Can Platinum Joint Sealing Tape be used at wall-to-floor junctions?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape can be used at wall-to-floor transition details where the wall and floor membranes overlap or connect and a sealed internal joint is required. Its main function is sheet-to-sheet bonding, so it should be placed inside the lap where the two membrane surfaces meet. For broader surface sealing across the corner or internal angle, Platinum Corner Tape may also be required depending on the waterproofing detail. Platinum Joint Sealing Tape is not a wide face-covering tape, so it should not be expected to replace corner detailing where a larger sealing area is needed. Used correctly, it helps connect wall and floor membranes into one continuous waterproof system.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) Can Platinum Joint Sealing Tape be used around pipes and service penetrations?\u003c\/h3\u003e\n\u003cp\u003eA) Yes, Platinum Joint Sealing Tape can be used around pipes, cables, conduits and structural protrusions where the membrane has been cut or shaped and a sealed overlap or joint can be formed. Service penetrations are important detailing points because they interrupt the waterproof membrane layer and can create weak points if not sealed correctly. The tape can be used within the overlap around the detail to bond adjoining membrane surfaces together and help maintain waterproofing continuity. For awkward or irregular penetrations, careful cutting, positioning and firm pressure are essential. Wider surface tapes, such as Platinum Corner Tape, may also be required where the penetration needs additional face sealing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) Is Platinum Joint Sealing Tape the same as Platinum Corner Tape?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape is not the same as Platinum Corner Tape, although both are butyl sealing tapes used in waterproof membrane systems. Platinum Joint Sealing Tape is a 30mm wide double-sided tape designed to sit inside membrane overlaps and bond one sheet directly to another. Its job is internal sheet-to-sheet jointing. Platinum Corner Tape is a wider face-applied tape used over junctions, corners, cut edges, service penetrations and wider detailing areas. In simple terms, Joint Sealing Tape seals within the lap, while Corner Tape seals over a broader surface detail. Many installations may use both products, depending on the joint, junction or membrane transition being formed.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) Can you plaster or render over Platinum Joint Sealing Tape?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape is not designed to provide a direct plaster or render key. Its purpose is to create a watertight butyl bond between membrane sheets, not to provide a textured surface for finishing materials to grip. Where it is used with meshed membranes and a direct plaster or render finish is required, \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/products\/mesh-membrane-tape\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum Mesh Tape\u003c\/strong\u003e\u003c\/a\u003e should be applied over the sealed joint to reinstate the surface key. This allows the Joint Sealing Tape underneath to perform the waterproofing function, while the \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/products\/mesh-membrane-tape\" target=\"_blank\" rel=\"noopener\"\u003emesh tape\u003c\/a\u003e \u003c\/strong\u003eprovides a suitable finish-ready surface. Without this extra mesh detail, plaster or render may not bond properly over the joint area.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) What are the best tips for using Platinum Joint Sealing Tape?\u003c\/h3\u003e\n\u003cp\u003eA) The best results with Platinum Joint Sealing Tape come from clean surfaces, careful alignment and firm pressure. The membrane faces should be dry, clean and free from dust, moisture, grease and loose debris before the tape is applied. The backing paper should be removed gradually, rather than all at once, so the tape can be positioned accurately along the overlap. Avoid stretching the tape or allowing it to twist, as this can affect the contact area. Once the adjoining membrane is pressed onto the tape, apply firm pressure along the full joint length. In cold or damp conditions, carefully warming or drying the membrane can improve adhesion.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) What are the main limitations of Platinum Joint Sealing Tape?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum Joint Sealing Tape should not be used as a substitute for correct membrane installation, proper lap formation or wider detailing tapes where they are required. It is an internal double-sided jointing tape, designed to sit between two membrane surfaces, not a surface-applied tape for covering large gaps, exposed edges or broad corner details. It must be applied to clean, dry membrane surfaces because dust, moisture, contamination, poor alignment or insufficient pressure can reduce adhesion and compromise the joint. It also does not provide a plasterable or renderable finish by itself. Where direct finishes, complex penetrations or wider junction details are involved, additional Platinum tapes may be needed.\u003cbr\u003e\u003c\/p\u003e","brand":"Platinum Building Chemicals Ltd","offers":[{"title":"(W) 30mm x (L) 30M","offer_id":7653480038430,"sku":"BWA24","price":19.5,"currency_code":"GBP","in_stock":true},{"title":"(W) 30mm x (L) 15M","offer_id":7923672023070,"sku":"BWA24-15","price":11.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2617\/5036\/files\/platinum-joint-sealing-membrane-tape-w-30mm-x-l-30m-waterproof-ancillaries-710.webp?v=1781187246","url":"https:\/\/www.platinumchemicals.co.uk\/products\/platinum-joint-sealing-tape-double-sided-butyl-cavity-membrane","provider":"Platinum Chemicals","version":"1.0","type":"link"}