Penetration sealing tape - Ampacoll BK 535 - 50mm x 25m


Ampacoll BK 535 penetration sealing tape is:-

  • a single sided, incredibly elastic adhesive tape with a split backing which allows simple, weathertight sealing of all penetrations.
  • suitable for internal and external use on all types of timber boards and membranes, removing the need for pre-formed grommets or gaskets.
  • suitable for all types of masonry and in areas of high humidity.
  • suitable for winter application down to 0 degrees C.

Where is it used?

  • Ampacoll BK 535 penetration sealing tape can be used internally and externally, on walls, roofs or floors. 
  • It is used to permanently seal around rafter, purlin, duct, vent, pipe or cable penetrations through vapour control, moisture barrier or breathable membranes.
  • Also suitable for air tightness sealing of timber sole plates to masonry plinths/slabs in timber frame construction.

How is it used?

  • Surfaces should be clean, dry and free of dust before the tape is applied. Porous, dirty or friable surfaces, such as masonry or wood fibre boards, must be primed with Ampacoll Primax Primer prior to application.
  • Ampacoll BK 535 penetration sealing tape bonds instantly to the surface so it is important to apply carefully.
  • Cut the tape to the required length and then remove one of the backing strips.
  • Apply the tape slowly and firmly to the object penetrating the membrane first. Once the tape covers the entire perimeter of the object with a 50mm overlap, remove the second backing strip.
  • Slowly and firmly press down and stretch the tape against the membrane or board surface, ensuring a good bond.

How much will I need?

  • Each roll of Ampacoll BK 535 tape is 50mm wide and 25m long. 

This product can be bought by the 50mm x 25m roll or in boxes of 4 rolls (10% cheaper than single roll cost).



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