Newton CDM Joint Tape

Key Features of Newton CDM Joint Tape

✔️ Double-sided self-adhesive butyl tape that joins adjacent membrane sheets into one continuous waterproof layer.

✔️ Sits inside membrane overlaps, flanges and stud-into-stud laps rather than covering the joint externally.

✔️ Durable butyl rubber compound provides strong adhesion, flexibility and long-term resistance to water and chemicals.

✔️ Supplied in 30mm x 22.5m rolls at 2mm thickness to conform neatly within studded membrane laps.

✔️ Maintains adhesive performance in high humidity, ideal for basements, cellars and retaining wall waterproofing installations.

Double-Sided Butyl Jointing Tape For Newton Cavity Drain Membrane Overlaps

Newton CDM Joint Tape is a specialist double-sided membrane sealing tape used to create watertight joints between adjacent Newton cavity drain membrane sheets. In below-ground waterproofing systems, membrane sheets must be properly connected so the finished installation performs as one continuous waterproofing layer rather than a series of separate panels. Newton CDM Joint Tape is installed within the overlap between two membrane sheets, where it bonds the adjoining surfaces directly together and seals the joint line along its full length. This makes it an essential accessory for Newton CDM waterproof membrane installations, particularly where sheet overlaps, flange joints and stud-into-stud laps all need to remain securely sealed throughout the life of the system.

Flexible 2mm Butyl Rubber Construction For Dependable Below-Ground Sealing

The tape is manufactured from butyl rubber, a material particularly well suited to below-ground waterproofing because it combines strong adhesion with flexibility and long-term resistance to water, air and chemical exposure. Its double-sided self-adhesive construction allows it to bond membrane to membrane without the need for a separate adhesive, while its 2mm thickness helps it conform to the profile of the membrane and maintain close contact within the joint. This is especially important on studded cavity drain membranes, where the tape must sit neatly within the lap and create a consistent seal despite surface texture, membrane shape and normal site tolerances. The tape also maintains its adhesive performance in high humidity and through normal temperature fluctuations, making it suitable for basements, cellars and retaining walls.

Practical 30mm Roll Format For Flanges Overlaps And Detailed Junctions

Newton CDM Joint Tape is supplied in 30mm wide by 22.5m long rolls, with the narrow width reflecting its purpose as an internal jointing tape rather than a wider surface sealing tape. It is used primarily along membrane flanges and overlaps, but is equally suitable for abutting joints and areas where the membrane has been cut or adjusted to allow an overlap, including corners, reveals, wall-to-floor junctions and detailing around protrusions or service entries. The tape should always be applied between clean, dry membrane surfaces, and in cold or damp site conditions a heat gun is often used carefully to assist adhesion before the joint is closed. Where the tape is used on meshed membranes receiving a direct plaster or render finish, Newton Mesh Tape should be applied over the sealed joint to reinstate the surface key.

Product Benefits

• Double-Sided Sheet-To-Sheet Bonding: Newton CDM Joint Tape bonds two membrane surfaces directly together within the overlap, creating a sealed connection between adjoining sheets rather than simply covering the joint from the outside face.
  
  

• Primary Jointing Tape For Newton CDM Systems: Designed for use within the Newton CDM Waterproof Membrane System, it provides the main sealed joint between cavity drain membrane sheets in basement waterproofing and below-ground membrane installations.
  
  

• Watertight Membrane Overlap Sealing: The butyl adhesive forms a watertight bond along membrane overlaps, flange details and stud-into-stud laps, helping prevent water from passing through the joint line and supporting the continuity of the waterproof layer.
  
  

• Durable Butyl Rubber Construction: Manufactured from butyl rubber, the tape provides strong adhesion, flexibility and resistance to water, air and chemical exposure, making it suitable for demanding damp, humid and below-ground environments.
  
  

• Correct Format For Internal Jointing: At 30mm wide and 2mm thick, Newton CDM Joint Tape is designed to sit neatly inside the membrane overlap, providing a precise jointing detail without unnecessarily spanning across the face of the membrane.
  
  

• Conforms To Membrane Profiles: The flexible butyl compound allows the tape to follow the shape of membrane flanges, laps and studded profiles, helping achieve close contact between the two sheets along the full joint length.
  
  

• Helps Create A Continuous Waterproof Layer: By sealing each membrane-to-membrane connection, the tape helps the installation perform as a connected waterproofing system, reducing weak points between separate sheets of membrane.
  
  

• Suitable For Complex Detailing: Newton CDM Joint Tape can be used not only on straight overlaps, but also on cut membrane areas, abutting joints, corners, reveals, wall-to-floor transitions and protrusions where careful sealing is required.

Typical Applications

• Membrane Overlap Sealing: Newton CDM Joint Tape is used between overlapping sheets of cavity drain membrane to form a watertight bond along the lap, helping maintain waterproofing continuity across walls, floors and other membrane areas.
  
  

• Flange Joint Sealing: Suitable for sealing membrane flange joints where adjacent sheets meet, ensuring the connection between the sheets is bonded and sealed as part of the Newton CDM waterproofing system.
  
  

• Stud-Into-Stud Lap Jointing: Used where one studded membrane sheet nests into another, allowing the double-sided butyl tape to bond the overlapping surfaces together and create a secure sealed lap.
  
  

• Abutting Membrane Joints: Suitable as part of the sealing detail for abutting membrane joints where sheets are brought together and require a watertight connection to prevent water movement through the joint.
  
  

• Corners And Reveals: Used 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.
  
  

• Wall-To-Floor Junction Details: Suitable for areas where wall and floor membranes are overlapped or connected, helping provide a sealed joint within a complete basement waterproofing or cavity drain membrane installation.
  
  

• Protrusions And Service Detailing: 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 properly.
  
  

• Meshed Membrane Joint Preparation: Used beneath Newton Mesh Tape where meshed membranes require both a watertight joint and a restored surface key for plaster or render finishes.