illbruck ME480 Fire Rated Butyl Tape BB – 250mm x 20m | Class B-s1, d0 Airtight Membrane
illbruck ME480 Butyl Tape BB – 250mm × 20m
The illbruck ME480 Butyl Tape BB is a high-performance, aluminium-faced, self-adhesive butyl membrane designed for critical airtight and watertight sealing in construction.
Designed for enhanced fire performance. ME480 is engineered for applications where fire classification is essential, while still delivering a permanent environmental seal. Always confirm suitability against the project specification and building control requirements.
Key Benefits
- High fire performance: Reaction to fire classified B-s1, d0 to EN 13501-1.
- Complete environmental seal: Airtight, watertight and vapour-impermeable barrier.
- Excellent durability: UV-resistant aluminium foil backing and resilient butyl layer.
- Strong adhesion: Bonds to many common building substrates (e.g. concrete, steel, timber, glass, aluminium).
- Flexible and accommodating: Helps tolerate movement without cracking in normal service conditions.
Typical Applications
- Perimeter sealing to the internal or external side of window and door frames.
- Façade and construction joint sealing where an airtight/watertight membrane is required.
- Repairs of vapour-impermeable joints and seals within sealing/compartmentation works.
Installation tip: Apply to clean, dry, stable surfaces and firmly consolidate with a seam roller. Overlaps should be minimum 25mm.
Technical Specifications
Key data for illbruck ME480 Butyl Tape BB (roll supplied: 250mm × 20m).
| Characteristic | Specification |
|---|---|
| Brand / Range | illbruck (Tremco CPG) |
| Product | ME480 Butyl Tape BB |
| Article / Product Code | 503514 |
| Roll Dimensions | 250mm (W) × 20m (L) |
| Thickness | 1mm |
| Fire Classification (EN 13501-1) | B-s1, d0 |
| Construction | Modified butyl rubber adhesive with PET / aluminium foil carrier |
| Colour / Finish | Aluminium |
| Watertightness | Pass to EN 1928 (also passes after ageing EN 1928 + EN 1847) |
| Vapour Diffusion | µ > 2,500,000 (vapour-impermeable) |
| UV Resistance | Excellent |
| Service Temperature | -20°C to +80°C |
| Application Temperature | +5°C to +35°C |
| Shelf Life | 24 months (unopened, stored flat at +5°C to +35°C) |
Frequently Asked Questions
What surfaces can ME480 bond to?
ME480 bonds well to many common building materials including glass, steel, concrete, stone, timber and aluminium, provided the surface is clean, dry, stable and free from dust/grease.
Do I need to use a primer?
On smooth, sound substrates, primer is often not required. For highly porous surfaces (e.g. some concretes/plasters) priming can improve adhesion. Ensure the substrate is prepared correctly and follow project specifications.
What is the fire rating of illbruck ME480?
ME480 has a reaction to fire classification of B-s1, d0 according to EN 13501-1.
What overlap should I use when joining strips?
Use a minimum overlap of 25mm at connections. As a rule of thumb for movement joints, allow the joint width plus approximately 50mm cover onto both sides (project dependent).
How do I apply it for the best seal?
Apply between +5°C and +35°C to clean surfaces. Once positioned, firmly consolidate along the entire length using a seam roller to ensure full contact. Bond strength increases over time.
Note: Always follow the project specification and relevant installation guidance for your application.
