Ampacoll BK 535 50 mm – Highly flexible butyl rubber tape & mouldable collar (5 m roll)

Ampacoll BK 535 is a top-of-the-range, single-sided adhesive butyl rubber tape, specially developed for the permanent sealing of demanding joints. Thanks to its unique material properties, it acts as a sleeve that can be moulded by hand.

The tape consists of pure, high-quality butyl rubber with a highly flexible top layer applied to one side. With an elongation of over 300 per cent, it adapts perfectly to component movement and reliably compensates for uneven substrates. It is the ideal solution for securely sealing penetrations through vapour control layers, vapour barriers and air and wind seals.

Data sheet 

Key features and benefits:

• Extremely flexible: Over 300 per cent stretchable – follows component movements and prevents cracks.

• 3D mouldable: Can be shaped by hand like modelling clay to seal complex details.

• Permanently reliable: The material is permanently elastic, does not become brittle and acts as a vapour barrier.

• Versatile: Excellent adhesion to wood-based panels, paper, PE, steel, aluminium, glass and more.

• Durable: High resistance to ageing (> 20 years) and chlorine-resistant.

Applications:

The main application is the sealing of wood-based panels and penetrations through vapour control layers and vapour retards, such as rafters, purlins, ventilation ducts, etc. Use a primer where necessary!

Technical data:

• Roll dimensions (as per data sheet): 5 m x 50 mm x 2 mm (adjust the length in the product title if necessary)

• Material: butyl rubber (colour: blue)

• Elongation: > 300 %

• Temperature resistance: -40 °C to +90 °C

• Application temperature: from 0 °C

• Ageing resistance: > 20 years

• Storage: Cool and dry

Application tips

Preparation: The surfaces to be bonded must be clean, dry and free from dust and grease. Ampacoll BK 535 is characterised by its immediate, very high bonding strength.

Application:

• Shaping: Make use of the tape’s flexibility to shape it around round or square penetrations (pipes, beams). It acts like a flexible sleeve.

• Pressing down: Due to the strong adhesive strength, repositioning is only possible to a limited extent.

• Critical substrates: For porous, dusty or soiled substrates (e.g. concrete, softwood fibreboard), a primer coat with Ampacoll Primax or Ampacoll Airmax is essential to ensure a permanent bond.