Alenor BF aluminium-butyl multi-purpose tape

ALENOR BF is a thick (1.2 mm) multi-purpose butyl tape with reinforced aluminium foil. The thicker butyl layer fills irregularities and gaps, so the tape copes well with roof flashings, chimneys, profiled sheets and gutters. The permanent-tack butyl compound bonds instantly to most building materials, and the joint grows stronger over time while staying flexible. Available in six colour shades.

Composition

• Reinforced aluminium foil – protects the butyl from UV and weather
• Grey permanent-tack butyl rubber compound
• Release liner, removed during application

Technical data

• Thickness: 1.2 mm (± 0.2 mm)
• Colours: aluminium, RAL 3005 (wine red), RAL 3011 (brown red), RAL 8017 (chocolate brown), RAL 7024 (graphite grey), RAL 8004 (copper brown)
• Sizes in stock: 50, 75, 100, 150, 200, 250, 300 mm × 10 m and 100 mm × 3 m
• Waterproof; vapour permeability 0.0002 mg/(m²·h·Pa)
• Adhesion: to concrete 0.3 kgf/cm², to steel 0.4 kgf/cm²
• Service temperature: −40 °C to +100 °C
• Application temperature: +5 °C to +40 °C
• Shelf life in original packaging: 36 months; service life: at least 10 years
• Bitumen-free – does not smear or melt in the sun, safe indoors

Where to use it

• Roof flashings, roof windows, balcony canopies and roof glazing.
• Quick repair of roofs, gutters and drainage systems.
• Cracks, gaps, seams and joints between concrete, metal, timber, plastic and polycarbonate.
• Installation seams of foam thermal insulation.
• Vans, campers, boats and metal equipment.
• Waterproofing of façade glazing elements.
• Vibration damping of metal bathtubs, sinks and window sills.
• Pipes and pipeline elements.

Advantages

• Excellent adhesion to most materials – glass, aluminium, steel, polymer coatings, fibreglass, concrete, timber.
• Self-seals punctures and cuts.
• High UV resistance.
• Flexible along its whole length, adapts easily to profiles.
• Hands and surfaces stay clean.

AluButyl or BF?

Both are aluminium-butyl tapes with the same composition and colours; the difference is thickness. AluButyl is thinner (0.7 mm) – more flexible, it follows small details and profiles easily and is economical on smooth surfaces. BF is thicker (1.2 mm) – more butyl fills irregularities and gaps, so it is better for roof flashings, chimneys and profiled sheets.

How to apply

1. The surface must be clean, dry and degreased; remove rust and loose paint.
2. Prime porous surfaces (concrete, fibre-cement, brick) with Alenor Super-Fix first.
3. Apply the tape gradually while removing the liner so it covers the joint on both sides.
4. Press firmly along the whole length with a pressure roller – butyl bonds through pressure.

Frequently asked questions

Which colour should I choose?
Pick the shade closest to the roof or façade covering; aluminium is universal for technical areas and gutters.

Which width should I choose?
The tape must cover the joint with a safe margin on both sides. 50–100 mm is usually enough for cracks and seams; wider tapes (150–300 mm) are used for chimney and wall flashings.

Is it suitable for a small hole?
Yes, but for a single spot of damage the Repair Patch is handier.

Read more: chimney and roof pipe sealing with butyl tape and the butyl tapes guide.

Delivery and wholesale

We deliver to DPD, Omniva and Venipak parcel lockers across Latvia in 2–3 working days and to Lithuania and Estonia in 2–5 working days (delivery terms). Construction companies and resellers get wholesale prices – email [email protected] or call +371 28348301.