Eco-Tech Building Solutions
WATstop
WATstop is a three-component epoxy-cement coating that waterproofs from either side of the structure. It holds back 9.5 atm of water pressure in direct thrust or counter-thrust, so it works...
WATstop is a three-component epoxy-cement coating that waterproofs from either side of the structure. It holds back 9.5 atm of water pressure in direct thrust or counter-thrust, so it works where water pushes from below slabs or behind walls in basements, cellars, tanks and pits. On concrete floors it lays down as a vapour barrier at 1.0 kg/m²; in dehumidification build-ups it primes the wall for Diathonite Deumix+. In the microcement system it is the waterproofing layer under Decorkrete in showers and wet areas. Applied by trowel or roller; stocked in white.
Key Features
- Bonds at 2.5 N/mm² even on glazed ceramic tile
- 2-hour pot life at 23°C
- Overcoat window 24 to 48 hours
- Doubles as a primer on smooth surfaces at 0.3 kg/m²
$3.85/ft² as vapour barrier (covers ~54 ft² at 1 coat)
$7.69/ft² full waterproofing (covers ~27 ft² at 2 coats)
Size
Color
Technical Details
Specifications
Technical Performance
Product specifications
Technical Documents
9 documents
Certifications
5 certifications
Key Features
Product highlights
Application
How to apply
Coverage & Yield
Application rates
FAQs
Common questions
Product Brochure
Download PDF
Technical Performance
| Format | Paste |
|---|---|
| Components | Three-component (A+B+C) |
| Waterproofing in positive pressure | 9.5 ATM - 139.61 psi |
| Waterproofing in negative pressure | 9.5 ATM |
| Adhesion to concrete substrate | 2.5 N/mm2 - 362.59 lbf/in2 (good) |
| Adhesion to expanded polyurethane panel | 1.25 N/mm2 (good) |
| Adhesion to expanded polystyrene | 1.5 N/mm2. |
| Adhesion to glazed ceramic tile | 2.5 N/mm2 - 362.59 lbf/in2 (good) |
| Pot Life | 2 hours with 23°C/73.4°F and 50% of relative humidity (high temperatures decrease workability time) |
| Dry time | 5-12 hours at 23°C / 50% RH |
| Package | Plastic Bucket |
| Weight | 5 k (11 lbs) or 10 kg (22 (lbs) |
Technical Documents
-
WATstop Technical Data Sheet
Download -
Watstop Technical Specification
Download -
Watstop Declaration of Performance EN 1504 2 CE
Download -
Watstop Declaration of Performance EN BS 1504 2 UKCA
Download -
Watstop Safety Data Sheet A
Download -
Watstop Safety Data Sheet B
Download -
Watstop Safety Data Sheet C
Download -
Watstop Leed and Well Credits Chart
Download -
Environmental Product Declaration, Waterproofing Products
Download
Certifications
Key Features
Application
Coverage & Yield
Coverage: 1.0 kg/m² per coat × 1 coat recommended
| Package | Covers | Price | Cost per ft² |
|---|---|---|---|
| 5 kg (2.5-5 m²) / White | ~54 ft² (5.0 m²) | $206.99 | $3.85/ft² |
| 10 kg (5-10 m²) / White | ~108 ft² (10.0 m²) | $319.99 | $2.97/ft² |
Figures are estimates for planning — actual coverage varies with substrate texture, application method, and technique.
Frequently Asked Questions
Product Brochure
-
WATstop Brochure
Download
Need Expert Guidance?
Our team is here to help with product selection and technical questions.
Share Your Experience
Be the first to share your project story. Your experience helps others on their journey.
