Rayson SealForce RC30 is a two-component, roller-applied polyurea-based liquid waterproofing membrane — highly elastic and hydrophobic, bonding strongly to concrete, tile, metal and asphalt for wet areas, roofs and car parks.
Best for concealed and exposed waterproofing under tiles, in bathrooms and wet areas, on roofs, and within car park, bridge and tunnel deck systems.
SealForce RC30 is Rayson's general-purpose liquid waterproofing membrane: a two-component polyurea-based system, roller-applied, that cures to a tough, highly elastic and hydrophobic film keyed hard to almost any prepared surface. It is designed to be tiled over, built into deck systems or left as the working membrane.
The film carries strong mechanical and chemical resistance and, unlike thermoplastic products, does not soften in heat — it holds up to a continuous 90 °C and brief thermal shocks to 200 °C, while staying flexible in the cold to -40 °C. Damage can be locally cleaned and re-coated in a short time.
It suits waterproofing beneath tiling, bathrooms and wet areas, roofs, bridge and tunnel decks, light metal and fibre-cement roofs, asphaltic membranes, and the primary membrane in car-park waterproofing build-ups. The concrete beneath must be sound and properly primed for the surface type.
A standalone product performs its job in a single application rather than as one layer of a multi-coat system.
The figures below are a guide for planning. Site conditions and workmanship affect results — confirm the details for your project with our technical team.
| Coverage | 1.5–1.8 kg/m² total (typically two coats at 0.75–0.9 kg/m² each) |
|---|---|
| Mixing | Two components; add Part B to Part A and mix with a low-speed mixer (~300 rpm) for 2–3 minutes to a uniform colour; prepare only what can be used within the pot life |
| Drying & curing | Pot life ~30 minutes; 4–6 hours to cure; 6–12 hours between coats; final cure 7 days |
| Pack sizes | Part A 25 kg + Part B 1.5 kg |
Yes — it is commonly used as a concealed waterproofing membrane beneath tiling in bathrooms and wet areas. Allow it to cure, then fix tiles with a compatible adhesive.
No. Unlike thermoplastic membranes it does not soften — it serves continuously to around 90 °C and tolerates brief thermal shocks to 200 °C, while remaining flexible down to -40 °C.
The concrete should be sound, with at least 25 N/mm² compressive strength and a pull-off strength of at least 1.5 N/mm², prepared and primed for its absorbency and surface type.
Normally two coats at about 0.75–0.9 kg/m² each, for a minimum total of roughly 1.5–1.8 kg/m². Actual consumption depends on substrate texture.
Yes — it is used as the primary waterproofing membrane within car-park deck systems, finished with the specified wearing course and anti-slip topcoat for traffic.
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Answers from Rayson's own product information
Guidance only — confirm specifications with the Rayson technical team.