Supraseal Flashing Tape

Supraseal® flashing tape is a self-adhesive, butyl-based waterproof tape for sealing roof leaks, single-ply membrane laps, gutters, flashings and modular building bay joints. It's cold applied in minutes, bitumen free, UV stable and backed by a 10-year warranty. Choose from 50mm, 100mm, 200mm and 300mm widths. Not sure which you need? Read our flashing tape width guide or use the tape finder.

Butyl tape vs bitumen flashing tape

Most DIY flashing tapes are bitumen based. They can soften in summer heat, crack in the cold and stain coated metal. Supraseal is a butyl tape: it stays flexible from -30°C to +80°C, doesn't harden in sunlight and won't stain plastisol-coated steel, so the repair lasts.

A lead flashing alternative

Supraseal is used as a lightweight, theft-proof alternative to lead flashing at walls, chimneys and roof lights, with no hot works or specialist tools. See flashing tape vs lead flashing.

Popular repairs

Free UK delivery on orders over £50 + VAT. Trade and pallet pricing available on request: open a trade account.