{"product_id":"platinum-ultraseal-membrane-joint-tape-double-sided-butyl","title":"Platinum UltraSeal Membrane Joint Tape","description":"\u003cp\u003ePlatinum UltraSeal Membrane Joint Tape is a double-sided self-adhesive butyl sealing tape used within the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/basement-waterproof-membrane-tapes\" 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 designed to sit within the overlap between two membrane sheets, bonding the surfaces directly together rather than covering the joint from the face. Manufactured from a flexible butyl rubber compound, it provides strong adhesion, water resistance and long-term durability in damp and below-ground environments.\u003c\/p\u003e\n\u003cp\u003eSupplied in 45mm wide x 9.5m long rolls with a 1.0mm thickness, Platinum UltraSeal Membrane Joint Tape is suitable for sealing membrane overlaps, flange joints, stud-into-stud laps, abutting joints, corners, reveals, wall-to-floor junctions and membrane detailing around protrusions. 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 membrane jointing tape is required.\u003c\/p\u003e\n\u003ch5\u003e\u003cspan\u003eDescription\u003c\/span\u003e\u003c\/h5\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features of Platinum UltraSeal Membrane Joint Tape\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e✔️ Double-sided butyl tape bonds membrane sheets within overlaps, creating secure watertight sheet-to-sheet joints below ground.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ 45mm width provides broader bonding area while sitting neatly inside laps, not across exposed faces.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ Flexible butyl rubber conforms to flanges, studs and irregular profiles for consistent contact along joints.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ Seals overlaps, abutting joints, corners, reveals, wall-to-floor junctions and service penetrations in membrane systems.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ Compatible with \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/basement-waterproof-membrane-tapes\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum\u003c\/strong\u003e\u003c\/a\u003e, \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/newton-waterproofing-membranes\" target=\"_blank\"\u003e\u003cstrong\u003eNewton CDM\u003c\/strong\u003e\u003c\/a\u003e, \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/platon-membranes\" target=\"_blank\"\u003e\u003cstrong\u003ePlaton\u003c\/strong\u003e\u003c\/a\u003e and \u003cstrong\u003e\u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/wykamol-membrane\" target=\"_blank\"\u003eWykamol\u003c\/a\u003e \u003c\/strong\u003esystems requiring double-sided butyl jointing tape.\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);\"\u003eWider Butyl Jointing Tape For Waterproof Membrane Continuity\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003ePlatinum UltraSeal Membrane Joint Tape is a specialist double-sided membrane jointing tape used to create watertight connections between adjoining sheets of cavity drain waterproof membrane. In basement waterproofing and below-ground membrane installations, each sheet must be securely joined to the next so the finished system performs as one continuous waterproofing layer. The tape sits within the overlap between membrane sheets, bonding the adjoining surfaces directly together and sealing the joint from inside the lap. This makes it suitable for key connection points within a waterproof membrane system, including flanges, 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 Strong Sheet-To-Sheet Adhesion\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eManufactured from a durable butyl rubber compound, Platinum UltraSeal Membrane Joint Tape combines strong adhesion with long-term flexibility and resistance to water, air and chemical exposure. Butyl rubber is widely used for below-ground waterproofing because it remains adaptable while maintaining a reliable seal in damp and demanding environments. Its double-sided self-adhesive construction allows two membrane faces to bond directly together without a separate adhesive, forming a direct sheet-to-sheet connection. Unlike surface-applied waterproofing tapes, UltraSeal is designed to sit within the membrane overlap itself, conforming closely to cavity drain membrane profiles, including flanges, studded surfaces 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);\"\u003e45mm Width For Overlaps, Junctions And Service Details\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003ePlatinum UltraSeal Membrane Joint Tape is supplied in 45mm wide x 9.5m long rolls with a 1.0mm thickness. The 45mm width provides a wider bonding area than narrow internal jointing tapes, while still being suitable for placement within membrane overlaps rather than spanning across the exposed face of the joint. It is used primarily for sealing overlapping waterproof membrane sections, but is also suitable at abutting joints and areas where membrane sheets have been cut, adjusted or shaped to create an overlap. Typical detailing areas include corners, reveals, wall-to-floor junctions and 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 And Leading Membrane Systems\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eWhen used correctly, Platinum UltraSeal Membrane Joint Tape provides a practical and consistent jointing method for \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/basement-waterproof-membrane-tapes\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum cavity drain membrane systems\u003c\/strong\u003e\u003c\/a\u003e and 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 installations. It is intended to create the watertight bond between membrane sheets, not to provide a plasterable or renderable surface. Where the tape is used on meshed membranes and a direct plaster or render finish is required 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 applied above the sealed area to reinstate the surface key. This keeps the waterproofing and finishing functions separate, ensuring the joint is sealed securely while the surface remains suitable for the intended finish.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .pc-platinum-ultraseal-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-ultraseal-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-ultraseal-joint-tape-table col:nth-child(1) { width: 38%; }\n  .pc-platinum-ultraseal-joint-tape-table col:nth-child(2) { width: 62%; }\n\n  .pc-platinum-ultraseal-joint-tape-table th,\n  .pc-platinum-ultraseal-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-ultraseal-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-ultraseal-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-ultraseal-joint-tape-table .pc-data-row td {\n    background: #fff;\n    text-align: left;\n  }\n\n  .pc-platinum-ultraseal-joint-tape-table .pc-data-row.pc-grey td {\n    background: #d9d9d9;\n  }\n\n  .pc-platinum-ultraseal-joint-tape-table .pc-spec-cell {\n    font-weight: 700;\n  }\n\n  @media screen and (max-width: 767px) {\n    .pc-platinum-ultraseal-joint-tape-table {\n      font-size: 14px;\n      min-width: 600px;\n    }\n\n    .pc-platinum-ultraseal-joint-tape-table th,\n    .pc-platinum-ultraseal-joint-tape-table td {\n      padding: 7px 9px;\n      border-width: 4px;\n    }\n\n    .pc-platinum-ultraseal-joint-tape-table .pc-main-title th {\n      font-size: 24px;\n      padding: 10px 8px;\n    }\n\n    .pc-platinum-ultraseal-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-ultraseal-joint-tape-table-wrap\"\u003e\n\u003ctable aria-label=\"Platinum UltraSeal Membrane Joint Tape Technical Information\" class=\"pc-platinum-ultraseal-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\"\u003eRoll Size\u003c\/td\u003e\n\u003ctd\u003e45mm x 9.5m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row pc-grey\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.0mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pc-data-row\"\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 pc-grey\"\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\"\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 pc-grey\"\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\"\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 pc-grey\"\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\"\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 pc-grey\"\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\"\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 pc-grey\"\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\u003ctr class=\"pc-data-row\"\u003e\n\u003ctd class=\"pc-spec-cell\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd\u003eBasement membrane jointing\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 Bonding: \u003c\/strong\u003ePlatinum UltraSeal Membrane Joint Tape bonds two membrane surfaces directly together within the overlap, forming a sheet-to-sheet seal rather than simply covering the joint from the exposed face of the membrane.\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 movement through the joint line and supporting the continuity of the waterproof membrane 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\u003eWider 45mm Jointing Format: \u003c\/strong\u003eThe 45mm width provides a generous bonding area within the membrane overlap, helping create a controlled seal while still allowing the tape to sit neatly between the two membrane sheets.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible With Multiple Membrane Systems:\u003c\/strong\u003e Platinum UltraSeal Membrane Joint Tape can be used within the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/basement-waterproof-membrane-tapes\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum Waterproof Membrane System\u003c\/strong\u003e\u003c\/a\u003e and 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 sealing tape is required.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConforms To Membrane Profiles: \u003c\/strong\u003eThe flexible 1.0mm butyl compound allows the tape to follow membrane flanges, laps, studded profiles and slight irregularities, helping achieve close contact between the membrane surfaces along the full joint length.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaintains Waterproofing Continuity:\u003c\/strong\u003e By sealing each membrane-to-membrane connection, the tape helps the installation perform as one joined waterproofing layer rather than separate sheets with vulnerable unsealed joint lines.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable For Detailed Membrane Work:\u003c\/strong\u003e Platinum UltraSeal Membrane Joint Tape can be used on straight overlaps, abutting joints, cut membrane sections, corners, reveals, wall-to-floor transitions and protrusions where careful joint sealing is required.\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 UltraSeal Membrane Joint Tape is used between overlapping sheets of cavity drain waterproof membrane to form a watertight bond along the lap, helping maintain 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 flange joints where adjacent sheets meet, ensuring the connection between the membranes is bonded and sealed as part of the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/basement-waterproof-membrane-tapes\" 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 and form a sealed lap within the joint.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAbutting Membrane Joints:\u003c\/strong\u003e Suitable as part of the sealing detail for abutting membrane joints where sheets are brought together and require a watertight connection to help prevent 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\u003eSuitable 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\u003e Used 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 UltraSeal Membrane Joint Tape used for?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum UltraSeal Membrane Joint 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 that sits inside the membrane overlap, bonding one sheet directly to the next rather than covering the joint from the exposed face. This makes it especially useful for basement waterproofing, below-ground membrane installations and cavity drain systems where sheet joints must remain watertight. Platinum UltraSeal Membrane Joint Tape is suitable for membrane overlaps, flange joints, stud-into-stud laps, abutting joints, corners, reveals, wall-to-floor junctions and carefully detailed areas around pipes, cables and protrusions.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) How does Platinum UltraSeal Membrane Joint Tape work?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum UltraSeal Membrane Joint Tape works by creating a direct sheet-to-sheet bond between two overlapping membrane surfaces. The tape is positioned within the overlap, with one adhesive face bonded to the first membrane sheet and the second adhesive face bonded to the adjoining sheet when the lap is closed. Because it is double-sided, the seal is formed inside the joint itself, helping prevent water from tracking through the membrane connection. The flexible butyl rubber compound allows the tape to conform to membrane flanges, laps, studs and slight surface irregularities. When pressed firmly into place, it helps create a continuous watertight joint along the full overlap length.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) Where should Platinum UltraSeal Membrane Joint Tape be used?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum UltraSeal Membrane Joint Tape should be used wherever cavity drain waterproof membrane sheets need to be joined with a sealed internal overlap. Typical uses include straight membrane laps, flange joints, stud-into-stud laps, abutting joints, corners, reveals and wall-to-floor transition details. It is also suitable where the membrane has been cut, adjusted or shaped around pipes, cables, conduits, protrusions and service entries, provided a suitable overlap or joint can be formed. The tape is particularly useful in basements, cellars and below-ground rooms, where membrane joints must be sealed carefully to maintain waterproofing continuity and reduce the risk of water passing through vulnerable joint lines.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) What membrane systems can Platinum UltraSeal Membrane Joint Tape be used with?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum UltraSeal Membrane Joint Tape is designed for use within the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/collections\/basement-waterproof-membrane-tapes\" target=\"_blank\"\u003e\u003cstrong\u003ePlatinum Waterproof Membrane System\u003c\/strong\u003e\u003c\/a\u003e, where it helps join cavity drain waterproof membrane sheets into a continuous sealed layer. 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 membrane jointing tape is required. This makes it useful for installers working across different waterproofing membrane ranges, especially where a wider internal jointing tape is preferred. Compatibility should still be considered in relation to the exact membrane surface, site conditions and system design. The tape must be applied to clean, dry membrane surfaces and firmly compressed for reliable performance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) What size is Platinum UltraSeal Membrane Joint Tape?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum UltraSeal Membrane Joint Tape is supplied in 45mm wide x 9.5m long rolls with a 1.0mm thickness. The 45mm width gives a wider bonding area than narrower internal jointing tapes, while still allowing the tape to sit neatly within membrane overlaps rather than across the exposed face of the joint. This wider format can be useful where installers want a more generous sheet-to-sheet bond inside the lap, especially around flanges, overlaps, transitions and more detailed membrane work. The 1.0mm thickness provides a flexible butyl layer that can conform to cavity drain membrane profiles and help maintain close contact between adjoining sheets.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) How do you apply Platinum UltraSeal Membrane Joint Tape?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum UltraSeal Membrane Joint Tape should be applied between clean, dry membrane surfaces. The tape is positioned along the membrane overlap, flange or stud-into-stud lap, with the backing paper removed gradually as it is laid into place. Once aligned, the adjoining membrane sheet should be pressed firmly onto the exposed adhesive face to close the joint and complete the seal. Full contact is important, so pressure should be applied along the full length of the overlap. 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 closed. Poor alignment, trapped dust and loose contact should be avoided.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) Can Platinum UltraSeal Membrane Joint Tape be used at wall-to-floor junctions?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum UltraSeal Membrane Joint Tape can be used at wall-to-floor junctions where the wall and floor membranes are overlapped or connected and a sealed internal joint is required. Its purpose is to bond membrane to membrane within the lap, so it should be positioned between the overlapping surfaces rather than used as a wide face-applied corner strip. For broader surface sealing across the actual wall-to-floor angle, Platinum Corner Tape may also be required, depending on the waterproofing design and the type of junction being formed. Used correctly, Platinum UltraSeal Membrane Joint Tape helps connect wall and floor membrane sections into one continuous waterproofing layer.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) Can Platinum UltraSeal Membrane Joint Tape be used around pipes and service penetrations?\u003c\/h3\u003e\n\u003cp\u003eA) Yes, Platinum UltraSeal Membrane Joint Tape can be used around pipes, cables, conduits and protrusions where the membrane has been cut or shaped and a suitable overlap or joint can be formed. Service penetrations are important detailing points because they interrupt the waterproof membrane layer and can become weak points if not sealed properly. The tape can be used within the joint around the detail to bond overlapping membrane surfaces together and help maintain continuity. On awkward or irregular penetrations, careful cutting, positioning and firm pressure are essential. Wider surface-applied tapes may also be needed where the penetration requires additional face sealing or more complex detailing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) Can you plaster or render over Platinum UltraSeal Membrane Joint Tape?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum UltraSeal Membrane Joint Tape is not designed to provide a direct plaster or render key. Its function is to create a watertight butyl bond between membrane sheets, not to provide a textured surface for finishing materials to grip. Where the tape is used on meshed membranes and a direct plaster or render finish is required 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 applied above the sealed area to reinstate the surface key. This allows Platinum UltraSeal Membrane Joint Tape to perform its waterproofing role within the joint, while the \u003ca href=\"https:\/\/www.platinumchemicals.co.uk\/products\/mesh-membrane-tape\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003emesh tape\u003c\/strong\u003e\u003c\/a\u003e provides the correct surface for plaster or render adhesion over the membrane.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eQ) What are the main limitations of Platinum UltraSeal Membrane Joint Tape?\u003c\/h3\u003e\n\u003cp\u003eA) Platinum UltraSeal Membrane Joint Tape should not be used as a replacement for correct membrane installation, proper lap formation or wider surface detailing tapes where they are required. It is a double-sided internal jointing tape, designed to sit between two membrane sheets, not a broad cover tape for large gaps, exposed edges or full corner face sealing. It must be applied to clean, dry membrane surfaces, as dust, moisture, grease, poor alignment or insufficient pressure can reduce adhesion and weaken the seal. It also does not provide a plasterable or renderable finish by itself. For complex junctions, service penetrations or direct finishes, additional Platinum tapes may be needed.\u003cbr\u003e\u003c\/p\u003e","brand":"Platinum Building Chemicals Ltd","offers":[{"title":"(W) 45mm x (L) 9.5M","offer_id":33353079783523,"sku":"BWA24-B","price":6.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2617\/5036\/files\/platinum-ultraseal-membrane-joint-tape-w-45mm-x-l-9-5m-waterproof-ancillaries-574.webp?v=1781187067","url":"https:\/\/www.platinumchemicals.co.uk\/products\/platinum-ultraseal-membrane-joint-tape-double-sided-butyl","provider":"Platinum Chemicals","version":"1.0","type":"link"}