Supraseal
Supraseal Butyl Flashing Tape – Roof Repair Tape
Supraseal Butyl Flashing Tape – Roof Repair Tape
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Supraseal® is a cold-applied, self-adhesive butyl tape that rapidly seals leaks in roofing membranes, gutters and flashings. Roofers and maintenance teams use it as a long-term roof leak repair, a permanent seal between dissimilar single-ply membranes, a gutter sealant and a lead flashing alternative. It's completely bitumen free and creates a waterproof seal in minutes.
Which width do I need?
Overlap the defect by at least 50mm on every side, so add about 100mm to the size of the defect and pick the next width up.
- 50mm: nail and screw holes, pinholes, fine cracks, pipe and cable entries, quick van or caravan repairs. Also available as a pack of 3 with free delivery.
- 100mm: gutter joints, short seam or lap fixes, narrow modular and site cabin joints, splits up to about 50mm.
- 200mm: single-ply laps and seams (EPDM, TPO, PVC), upstands and abutments, corners, outlets and penetrations, splits of 50–100mm.
- 300mm: deep upstands and parapets, wide bay and module joints, large flat roof patches, valleys and wide flashings, splits over 100mm.
Delivery and returns
- Free UK delivery on orders over £50 + VAT. Under £50, delivery is just £3.95 + VAT (Royal Mail Tracked 48), or choose next-day delivery at checkout.
- Shipped from our UK warehouse in Leeds, with tracking.
- 300mm × 10m back in stock late November – order now to reserve. Pre-orders are dispatched as soon as the new stock arrives. All other sizes are in stock for next-day delivery.
- 30-day returns on unused items in original packaging (returns policy).
- Bulk, pallet or site deliveries: email hello@supraseal.com for a quote.
Why Supraseal
- Seals in minutes: cold applied, with no torch or liquid. The bond strengthens over time.
- Bitumen free: butyl based and non-staining on plastisol-coated steel.
- Built to last: UV stable, waterproof and airtight, from -30°C to +80°C.
- Moves with the roof: stays flexible as the roof heats and cools, and doesn't harden in sunlight.
- Forgiving: it can be repositioned in the first few minutes, and painted over to blend in.
- 10-year warranty.
Where to use it
Lean-to roofs, conservatories, carports and canopies where polycarbonate sheets meet a wall; chimneys and roof lights; cladding and facade joints; gutters and flashings; caravans and motorhomes; and air-conditioning pipework where it passes through a wall.
Fitting tips
- Make sure the surface is clean, dry and free of dust and grease.
- On polycarbonate, don't clean with solvents: use soapy water and let it dry.
- Overlap joins by at least 50mm.
- Press it down firmly with a seam roller, working out any air.
Sticks to
EPDM, TPO and aged PVC single-ply membranes, SBS bitumen, asphalt, concrete, masonry, fibre cement, clay tiles, slate, lead, aluminium, copper, glass, timber, fibreglass, polyethylene, polypropylene and polystyrene.
Butyl tape FAQs
Is butyl tape better than bitumen flashing tape?
For a lasting repair, yes. Bitumen tapes can soften in summer heat, crack in the cold and stain coated metal. Butyl stays flexible from -30°C to +80°C, doesn't harden in sunlight and won't stain plastisol-coated steel.
Can I use it instead of lead flashing?
Yes. Supraseal is widely used as a lead flashing alternative at walls, chimneys and roof lights. It's lighter, has no scrap value to thieves and needs no hot works. See flashing tape vs lead flashing.
Does it need a primer?
Not on most clean, dry, firm surfaces. Brush off dust, moss and loose granules first, and roll the tape down firmly.
Can I apply it in cold or wet weather?
The surface must be dry and free of dust and grease. On cold days, keep the roll somewhere warm before you start, as the tape is easier to work when it isn't cold.
Can it be painted?
Yes, it can be painted over to blend in with the roof or wall.
How long does it last?
It's UV stable and backed by a 10-year Supraseal® warranty. Step-by-step guides: felt roof repair, leaking gutter joints, EPDM roof repair.
Specification
- Base: butyl compound, bitumen free
- Application: cold applied; roll firmly to start the bond
- Service temperature: -30°C to +80°C
- Widths: 50mm, 100mm, 200mm and 300mm, in 5m and 10m rolls (which width?). Also in white, 150mm x 10m for caravans and motorhomes, and black, 200mm x 10m.
- Classification: not classified as hazardous; not regulated for transport
Downloads
Technical data sheet (PDF) Request safety information sheet
Watch it applied
Apply it with our silicone seam roller. Buying for a crew, a production line or a merchant counter? Email hello@supraseal.com for trade and pallet pricing.
Technical specifications
| Base | Butyl compound, bitumen free |
|---|---|
| Backing | UV-stable laminated backing with siliconised release liner |
| Colour | Grey |
| Thickness | 0.8mm |
| Adhesion (pull force) | More than 10 N/cm (MEL052) |
| Water vapour permeability | Less than 1 g/m²/24h (NFT 30-018) |
| Sag resistance at 70°C | Less than 3mm (ISO 7390) |
| Tear resistance | 3 N (NFT 54-108) |
| Service temperature | -30°C to +80°C |
| Application temperature | +5°C to +40°C (prime the surface below +5°C) |
| UV resistance | UV stable, suitable for exposed use |
| Finish | Can be painted |
| Compatible substrates | EPDM, TPO, aged PVC single ply, SBS bitumen, asphalt, concrete, masonry, fibre cement, clay tiles, slate, lead, aluminium, copper, glass, timber, fibreglass, polyethylene, polypropylene, polystyrene |
| Shelf life | 24 months in unopened packaging, stored below 30°C |
| Classification | Not classified as hazardous (article under REACH) |
| Warranty | 10 years |
With me I needed to repair a Storm Protector kept outside to cover my mobility scooter. But it could be used to repair covers or tents depending on what they are made of.A cheeky seagull had made holes in the roof of my Storm Protector so I bought Super Seal ( 3 rolls) .And it was ideal. Adhesive was good, waterproof and strong enough to stop the seagull attacking it again.I recommend it.Caroline.
Sticks well , not rained yet
Worked wonders on a leak on shed
POSITIVESCertainly sickly, could possible remove skin if not carefulNEGATIVESThere is not much on the rollNot as flexible as I would like when covering an uneven surface, edges tend to liftDoes not like dusty surfaces - clean carefully before handOVERALLA good stop-gap en-route to a better long term fix
Very good
Does what it says it does .
Arrived on time. I found it difficult to use by myself if using large strips because there is no one to hold the other end so easier if you have another set of hands, because once you take the backing off it can easily get stuck to itself and there is no way to unstick it and then it's wasted, especially if you are using it against a vertical surface. So I've had to do smaller over lapping strips. I've used it to cover the base of of my wooden shed to a wide concrete lip as it gets very wet in winter. Won't know till then if it's working but it definitely covers well, so much so I bought more to ensure the project is finished.
This tape is amazing!! Some of the panels on my wooden shed had started to bend and bow from the weather and had created gaps. This tape is super strong and very adhesive. I waited a while to review it, and it has all stayed in place and there is no rain coming through. It can be painted over so it doesn’t stick out. I can’t recommend it highly enough!!
Applied to a garage roof which has cracks in - corrugated cement (asbestos?? 😳). Used a small, plastic, wallpaper roller to apply firmly. Sticks very well and has stopped the leaks entirely. Would recommend and very good value for money.
Excellent product
Work very well. VERY sticky. Used on a waterbutt with a split. Had to reapply as did not stick very well to a contour but since that does the job.
Very strong and perfectly adequate for sealing felt joins before slopping the sticky stuff all over it :)I had exactly the right amount for the job I was doing and I have used this stuff before and it lasts well and is very sticky and doesn't peel off like many similar products.
strong and sturdy waterproof repair tape
Why do most of the picture show this item in black yet in does not seem to available in black. Only grey.
Did not completely stop leak the pipe is still dripping a little
Not quite as strong as others i have used , but was ok for this job
Very effective tape if a bit difficult to apply. Very sticky and you ideally need a little roller to push it down. Certainly did the job and as it's the first time I've used it the application issues are probably more my inexperience than the product.
An external drain pipe blocked and we couldn't get anyone out to fix it. Instead, we drilled a hole in the pipe, inserted an auger to clear the blockage, and then used this tape to cover the hole.Temperature was below zero, so followed the instructions to keep the tape at room temperature before use, and then used a heat gun to help with adhesion once it was applied to the pipe. (A reasonably powerful hairdryer would probably work instead of a heat gun).Easy to use and the repair is holding up well so far. Overall very pleased. Glad we have plenty left in case other urgent repairs are needed.
So I'm a stickler for product reviews and always try to give my best review and advice on a product I buy. This tape had mixed reviews but I also thi k sometimes people buy stuff like this thinking it would stop a massive leak and be a permanent job. Wrong!Yes you 100% need to clean the area properly before use but I'd also advise you use a small amount of heat from a hair dryer or hot air gun after applying it as it seems to seal the glue alot better given you the best hope of a waterproof seal.It cuts lovely easing use in tight areas. Am going to have to find an air tight box to store in now after use to save the glue going off to quickly.Overall a solid 4 stars for me and my use ( cracked headlight back just wanted to ensure waterproof till I can get a new back)
Whilst it appears to be a good product and was easy to use although very thin.I used it to seal over roofing felt joints and rolled it into place as advised (see question asked by me/answer received). Time will tell if it is effective and durable. I should add the roofing felt is in good condition and of the type with a relatively smooth finish, well laid and impossible to get any new adhesive into the overlaps without causing damage to the felt.I feel it was very overpriced.