






💧 Seal the deal with invisible strength—because leaks don’t wait!
This 35oz transparent liquid waterproof sealant from Hangzhou Huyan Technology is a versatile, water-based rubber coating designed for indoor and outdoor leak repairs. It forms a durable, invisible film that resists heat, cold, and moisture, covering approximately 14 sq ft per kilogram with multiple coats. Ideal for roofs, walls, pipes, and more, it offers professional-grade protection with easy application and long-lasting results.




| Manufacturer | Hangzhou Huyan Technology Co., Ltd |
| Part number | HPFSJ001 |
| Item Weight | 998 g |
| Product Dimensions | 11.5 x 11.5 x 13.8 cm; 997.9 g |
| Item model number | HPFSJ001 |
| Colour | Transparent |
| Style | Compact |
| Material | Rubber |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Special Features | Heat Resistant, Waterproof |
| Specific uses | Flat roofs, sloped roofs, roofs, external wall cracks, foundations, sheds, basements, metal, wood, concrete, gutters, skylights, PVC pipe joints, windows, RVs, DIY projects, external walls pipeline, seals pipeline leaks, walls, corners, toilet leaks, substrate joints, car roofs, pools, baths and more. |
| Included components | 35oz (1kg) Waterproof Patch Sealant Clear Coating (brush not included) |
| Batteries included? | No |
| Batteries Required? | No |
M**E
My lips aren't sealed
Amazing! No more holey leaks and ingress. Does exactly what it says.
H**N
Sealant
The sealant is very easy to use and does the job. It is nice and thick but usable. I have used it on three different items and have plenty left therefore, worth the money.
A**R
Needs a few coats
Works reasonably well nut not 100%
L**D
Damp proofing
Really easy to use, used it to stop future damp in my bathroom after we re decorated it.
P**J
It works
Shed roof fixed. Good product
D**E
Expensive but ok
Product is very thin but did do the job to a large extent. Overly priced.
J**E
Prompt delivery
Easy to use
A**C
Not designed for a pond
After this length of time, this product has started to lift from the stones around our pond waterfall
Trustpilot
5 days ago
2 months ago