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💧 Seal your pond, not your worries — waterproof like a pro!
Bonda G4 Pond Sealer Clear 1kg is a high-performance polyurethane waterproof sealant designed for ponds and water features. It offers durable protection against leaks, UV rays, and harsh weather, while providing easy brush or roller application on multiple surfaces including concrete, brick, stone, and fibreglass. Trusted by professionals and DIY enthusiasts alike, it ensures a clear, long-lasting finish that keeps water exactly where it belongs.



| ASIN | B003ZGE16A |
| Best Sellers Rank | 23,249 in DIY & Tools ( See Top 100 in DIY & Tools ) 437 in Sealers 1,287 in Garden Décor |
| Brand | Bonda |
| Colour | Clear |
| Compatible Material | Fibreglass |
| Customer Reviews | 4.4 4.4 out of 5 stars (307) |
| Included Components | G4 Pond Sealer 1kg |
| Item Dimensions | 11 x 11 x 11 centimetres |
| Item Form | Liquid |
| Item Type Name | G4 Pondsealer Clear 1kg |
| Item Weight | 0.2 Kilograms |
| Manufacturer | Rustins |
| Manufacturer Part Number | BON12222 |
| Material | Polyurethane |
| Model Number | BON12222 |
| Number of Items | 1 |
| Style Name | Clear |
| Surface Recommendation | Concrete, brick, stone |
| Unit Count | 1000.0 gram |
| Water Resistance Level | Waterproof |
J**L
Really good stuff, does what it's supposed to.
Super quick delivery, well packaged, and fair price. Second purchase, used 3 years ago to seal a natural stone (cemented in) on a stream to my pond. Recommended to re-do every 3 years and it is flaking in a few places. Three consecutive coats as per instructions will do the trick. Thank you.
G**S
Excellent product
We have used this product for many years. It is an excellent productand keeps water from penetrating through stonework. Does what it says on the tin. Would highly recommend
F**K
Seals but isn't clear.
Seals the stepping stone slabs but isn't clear... leaves a pale caramel/honey colour. The stepping stones were used in my pond on a side where ive a tiny leak about 3"~4" from the top I can't find... hoping that sealing these small slate before using with the black expanding pond foam would help to stop it. Only way - as I knew it would have to be - is to use a new liner at some point next year.
A**S
Does what it says on the tin!
Easy to apply, as directed (although I did dispose of the [cheap] paintbrush afterwards, rather than trying to clean it). Covers and adheres well, and four coats easily managed in 6-8 hours. Didn't find the smell a problem. Inherited an old, defunct waterfall, and fitted new pump and pipework, and re-cemented loose stones, but still some leakage. After application of G4, and requisite curing time, I am pleased to say that the watercourse is now working well, with no water loss apart from expected evaporation. Dries on the stone with a shiny, 'wetlook'. During application, a little of the product dribbled into the reservoir, but laid as a film on the water surface. Easily removed, rather like a piece of used clingfilm!
M**S
Effective waterproofing product
Why did you choose this product over others?: Fair price and very effective in its chosen use
C**S
Not clear.
This is not clear. It leaves a golden honey colour on whatever you paint it on. Wish they were clearer on this as it's affected the look of my water feature. Not sure if it works yet. Still need to fill it with water.
H**S
Good product for sealing leaks
Stopped leaks on my water feature. Easy to use and whilst not the cheapest product around it did exactly what it said on the tin, so was good value for money. It stuck to the surface and dried quickly. Not had any problems with leaks since using it
J**R
Says what it does on the tin
This product is great, we have had a pool for 30 years, and suddenly started leaking, not sure where the leak was, we used this product and hey presto, it leaks no more! It has sealed the floor and walls of the pool.
Trustpilot
5 days ago
3 weeks ago