

💧 Seal the deal on lasting protection—because your surfaces deserve the best!
Everbuild 402 Water Seal is a high-performance, solvent-free waterproofing solution designed to protect brick, stone, concrete, and plaster surfaces. Its breathable, water-based formula forms a durable, clear barrier that repels water and prevents damage, making it ideal for both indoor and outdoor applications. Supplied in a 5-litre container, it offers excellent coverage and quick drying without altering surface appearance.









| ASIN | B0012LETNK |
| Best Sellers Rank | 5,180 in DIY & Tools ( See Top 100 in DIY & Tools ) 117 in Sealers |
| Brand | Everbuild |
| Colour | Clear |
| Compatible Material | Brick, stone, plaster, concrete |
| Customer Reviews | 4.4 out of 5 stars 5,479 Reviews |
| Global Trade Identification Number | 05029347004255 |
| Included Components | 1 x Bottle |
| Item Dimensions | 18 x 20 x 24 centimetres |
| Item Form | Liquid |
| Item Type Name | Long Lasting Protection From Water Damage |
| Item Weight | 11.02 Pounds |
| Item dimensions L x W x H | 18 x 20 x 24 centimetres |
| Item height | 24 centimetres |
| Item weight | 11.02 Pounds |
| Manufacturer | Sika Everbuild |
| Manufacturer Contact Information | Sika Everbuild 41 Knowsthorpe Way, Leeds LS9 0SW |
| Material | Silicone |
| Style | Single |
| Style Name | Single |
| Surface Recommendation | Wall, floor, roof |
| UPC | 764210982531 |
| Unit Count | 5000.0 millilitre |
| Water Resistance Level | Water Repellent |
| Water resistance level | Water Repellent |
S**N
Everbuild 402 water seal
I’ve tried several waterproofing products over the years, and Everbuild 402 Water Seal really stands out. The application is straightforward, it dries quickly, and the results are impressive. Once applied, it provides a strong, long-lasting barrier against water, even in areas that see heavy exposure. I appreciate that it’s solvent-free, which makes it safer to use indoors and around plants. A 5-litre container goes a long way, making it great value for the price. My walls and surfaces have stayed dry and protected through rain and damp conditions, and I’d definitely recommend this to anyone looking for a reliable, durable waterproofing solution.
A**X
Brick water seal
The fact that you need to apply two coats within an hour is not great. Dries clear with no visible sign of any colour change in bricks or pebble dash rendering.
A**R
Good product.
Good product and seems to do the job. Very easy to use with a sprayer. It does not change colour of brick work but they do look, for some reason, better. Good price and good service from the seller.
P**P
It works
Excellent product,easy to apply and effective.
K**H
Works well
Easy to use, good price
M**D
Decent, but needs multiple layers to work well
I bought this product recently and it’s okay overall. The quality is fine, but I found that you really need to use multiple layers to make it truly effective. On its own, a single layer isn’t quite enough for the level of coverage or protection I was expecting. It does the job eventually, but not as easily or efficiently as I had hoped. Not a bad purchase.
K**S
Ok
Ok
S**D
Effect on driving rain with Everbuild 402 water seal
This product works a treat. I part treated our south east facing wall and the photo shows the effect of Storm Claudia. The rain simply bounces off the treated part on the left! I must paint the rest next Summer.... I would recommend safety glasses when applying the product. Splashes in the eyes will make them sore for days.
Trustpilot
1 week ago
3 weeks ago