Technical Data Sheet
| Document | RY-TDS-301 |
|---|---|
| Revision | Rev. 1.0 |
| Issue date | July 2026 |
| Status | Issued |
Rayson HydroShield · Water-based & low-odour systems
Rayson HydroShield WE40 is a two-component, water-based epoxy used as a self-priming primer-and-topcoat system on concrete, screed, asphalt and metal — including damp surfaces.
HydroShield WE40 is a water-dilutable two-component epoxy that works as its own primer and topcoat — one product, applied in successive coats, takes the floor from prepared concrete to a finished coloured seal coat. That self-priming simplicity cuts product count and programme risk on straightforward floors.
Standalone coating.
Figure 1 — Typical system build-up (top to bottom). Layer thicknesses are system-dependent; confirm the specification for your project.
| Surface preparation | Substrate must be sound, clean and free of oil, grease, laitance, loose material and bond-inhibiting contaminants. Prepare concrete mechanically (captive shot blasting, milling or diamond grinding); remove weak concrete, open blowholes and voids, and reinstate imperfections with a suitable Rayson repair product. Vacuum all dust. New concrete should be at least 28 days old. |
|---|---|
| Mixing / dilution | Two pre-weighed parts, mix ratio 4:1 (A:B) by weight; mix mechanically for at least 2–3 minutes; pot life up to 30 minutes at 30 °C |
| Application method | Roller, Brush, Airless spray |
| Coverage | 6–8 m² per kg per coat, varying with substrate condition |
| Application conditions | Minimum substrate temperature 5 °C; substrate moisture content max 5%; minimum mixing temperature +10 °C; cure between +10 °C and +35 °C; prepared substrate pull-off strength above 1.5 N/mm². |
| Drying & curing | Final cure 7 days |
| Recoat interval | Available from the Rayson technical team on request. |
| Film / thickness | Available from the Rayson technical team on request. |
| Pack sizes | Part A 4 kg / Part B 1 kg, or Part A 16 kg / Part B 4 kg per set |
| Storage | Minimum 12 months at 5–35 °C in unopened original packaging; protect from direct sunlight. |
| Shelf life | Approximately 12 months unopened, in a cool area. |
Figure 2 — Application workflow. Each stage is a hold point: confirm the previous stage is complete and within specification before proceeding.
Self-priming seal coat system
UV-stable variant for exposed areas
Low-odour water-based product. Wear gloves and eye protection; ensure reasonable ventilation. Avoid skin and eye contact. Keep out of reach of children. Consult the Safety Data Sheet (in preparation) before use.