HS Butyl Polyband

• Prevents air leakage through lap joints to conform with the requirements of Approved Document L2:2006.
• Can be applied in cold conditions without reduction in long-term performance.
• Reduces condensation in built-up metal roofing systems by effectively sealing the metal liner to conform with the requirements of the Building Regulations Approved Document L2:2006.
• Unique high tack adhesive for instant grab.
• Special high-strength, non-tear laminated film.
• Outstanding adhesion to coated steel and aluminium sheets without the need for primers.
• Supplied in self-wound rolls for easy application.
• Very low moisture vapour transmission rate.
• Predicted service life can exceed 20 years.

Surface preparation

• All surfaces should be clean, dry, and free from frost, grease, and loose materials.

• When cleaning contaminated substrates, HS Butyl recommends using propan-2-ol (IPA) and allowing it to dry before applying the butyl tape.

Application

• Apply directly from the reel onto one surface and press along its entire length to achieve good initial adhesion.

• The use of a roller with firm pressure is recommended to roll the joint and ensure a good bond.

• A high performance air seal and moisture barrier tape developed especially for sealing side lap joints of metal roof and wall liners to reduce condensation and increase airtightness in buildings.
• Polyband® can be used as recommended in the MCRMA Technical Paper No.14 Guidance for the Design of Metal Roofing and Cladding to comply with Approved Document L2:2006.
• Polyband® can be used on purlins to prevent cold-bridging.
• Polyband® can be used to separate different metal components to prevent bimetallic corrosion.
• Care must be taken to seal the joints at the eaves, ridge, and any pipe or service penetrations in order to provide a completely airtight building.
• The use of GCA® preformed butyl sealant is recommended for sealing between the end laps of liner trays.
• Polyband® can be used to seal sidelaps in steel decking.
• Polyband® can be used to overtape joints in vapour control layers.

24 months when stored flat in original packaging in cool, dry conditions.