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🔧 Seal it once, seal it right—because leaks are so last season!
The LLPT Butyl Seal Putty Tape is a 3mm thick, 19mm wide, and 10-meter long synthetic rubber tape designed for airtight, waterproof sealing across multiple surfaces. Engineered for durability and flexibility, it resists extreme temperatures, chemicals, and moisture, making it perfect for windows, doors, roofs, and automotive applications. Its high viscosity and elasticity ensure a mess-free, shock-absorbing seal that outperforms traditional mastics, offering exceptional value and professional-grade reliability.










| ASIN | B08HSY9N76 |
| Adhesive Format | Strip |
| Adhesive Location | Single Sided |
| Adhesive Material | Butyl |
| Best Sellers Rank | 6,753 in DIY & Tools ( See Top 100 in DIY & Tools ) 12 in Butyl Tape |
| Brand | LLPT |
| Colour | 1 X Black |
| Compatible Material | Glass |
| Country Of Origin | China |
| Customer Reviews | 4.5 out of 5 stars 2,754 Reviews |
| Global Trade Identification Number | 07915901300544 |
| Included Components | 1 Pack Butyl Seal Putty Tape |
| Item Dimensions L x W x Thickness | 19W x 3Th millimetres |
| Item Resistance | Chemical Resistant, Cold Resistant, Heat Resistant, Water resistant |
| Item Thickness | 3 Millimetres |
| Item Weight | 0.83 Kilograms |
| Manufacturer | LLP International Group |
| Manufacturer Part Number | BST343 |
| Material | ROHS Rubber |
| Model Number | BST343 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of items | 1 |
| Other Special Features of the Product | Strong |
| Recommended Uses For Product | Windows and doors, Windshield, Mobile home, Pipes, Joint sealing, Glass, EPDM or metal roofs, Wood, Plastic, Glass |
| Recommended uses for product | Windows and doors, Windshield, Mobile home, Pipes, Joint sealing, Glass, EPDM or metal roofs, Wood, Plastic, Glass Recommended uses for product Windows and doors, Windshield, Mobile home, Pipes, Joint sealing, Glass, EPDM or metal roofs, Wood, Plastic, Glass See more |
| Size Name | 19MM X 10M |
| Special feature | Strong |
| Surface Recommendation | Glass, Metal, Plastic, Wood |
| UPC | 791590130054 |
| Unit Count | 10.0 meter |
| Upper Temperature Rating | 98 Degrees Celsius |
| Water Resistance Level | Water Resistant |
L**R
Sticky, sticky.....
I usually buy a mastic based sealant to seal my Motorhome roof windows, after a recommendation from a friend I looked at the Butyl strips as an alternative, the other 'Named' brands were a 5 meter roll for roughly the same cost as this item but this one has 10 meters on the roll so better value straight away. Still a bit sceptical, I installed the tape on the roof and Ohh my word, it sticks, I mean, it really sticks, when you use this you only get one chance to get it right, so be precise and certain you have everything lined up correctly. The window has been fitted and it has sealed perfectly, there was heavy rain that evening and there were no leaks at all. Highly recommend this tape and I certainly won't be going back to the mastics.
B**R
Easy to use and effective
Purchased this to reseat a roof light in a motorhome. Easy to use and fixed the leak straight away.
C**H
Great stuff.
Good stuff, did the job. Worth knowing that if using in any kind of situation where it is squeezed under tension and left over time (I used it for mounting boat rubbing strakes) that it will continue to squeeze out in areas, particularly in hot weather.
G**E
Good quality.
Good quality tape for sealing roof vents, but beware of clear tape stuck on meter through the roll.
M**E
Works well
Well packaged and easy to use
R**R
Great stuff
Great product, sticks well and should be waterproof. We'll see!
J**S
Tape
Quality kit
J**E
Sealer
Works a treat seals no issues
A**Z
Muy buena y recomendable
La he utilizado para sellar la claraboya Seitz grande de techo en mi AC y estoy muy contento con el resultado. No escatimes en cantidad al montar. No vuelvo a usar polímero para sellado nunca más, ya me ha fallado varias veces con filtraciones. Mucho más seguro el butilo.
S**S
Excelente
Muito bom material , bastante maleável excelente para aplicar
L**O
Larghezza costante, ottimo prodotto
Ottimo prodotto, a differenza di marchi blasonati ė di larghezza costante ed è un po' meno appiccicoso, quindi più agile da stendere
T**M
Stops leaks
Great stuff. There is a bit of a learning curve to using it effectively. Free tip, keep everything clean. Another free tip, watch a couple of youtube videos before diving in to leakproof your deadlights. My deadlights don't leak anymore but, had I informed myself better, they would not look as tatty. They still look much better than when I tried it with Sikaflex. Update: Don't use this where it is exposed. It will still be waterproof but look terrible as it remains sticky, forever. I now use this for bedding and waterproofing but seal off with with Sikaflex 591. Another tip, Use White Spirit to clean it off places you can't work out how it got on to.
L**2
Sticky, pliable
It’s sticky , it’s black, and it’s mucky. Pretty well what you want. Works as it is supposed to.
Trustpilot
2 weeks ago
1 month ago