Highly elastic (>500% elongation), hydrophobic membrane
Waterproofing beneath tiling and in bathrooms and wet areas
Rayson SealForce RC30
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
Best for concealed and exposed waterproofing under tiles, in bathrooms and wet areas, on roofs, and within car park, bridge and tunnel deck systems.
Real product · Interactive depth view Rayson SealForce
Product system Rayson SealForce RC30
Part A 25 kg + Part B 1.5 kg RY-TDS-1102
Rayson SealForce RC30 has one clearly defined, verifiable job in the coating system.
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.
Strong adhesion to concrete (>2.5 N/mm²) and many other surfaces
Roof waterproofing
Does not soften in heat — serves to 90 °C, tolerates shock to 200 °C
Primary waterproofing membrane in car-park deck systems
Seal complex details with one elastic membrane.
A highly elastic roller-applied membrane for wet areas, roofs, decks and junctions across concrete, tile, metal and asphalt.
A controlled route to applying Rayson SealForce RC30.
This sequence supports early planning. It does not replace the current Technical Data Sheet, approved method statement or project-specific technical review.
- 01
Inspect and prepare the substrate
Sound concrete of at least 25 N/mm² compressive strength and 1.5 N/mm² pull-off
- 02
Prepare the material as specified
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
- 03
Apply with the correct tools
Recommended methods: Roller, Brush. Confirm coat count and thickness for the project.
- 04
Protect through the required cure
Pot life ~30 minutes; 4–6 hours to cure; 6–12 hours between coats; final cure 7 days
Coating system cutaway
Every layer has a job—from prepared substrate to service surface.
This diagram explains a typical system position, not a fixed specification. Primer, body coat, finish, thickness and detailing must be confirmed for the project.
Position in the system Standalone coating
Rayson SealForce RC30 serves as the standalone coating. Confirm the complete build-up against the substrate, exposure and project requirements.
Related system products
Review primers, body layers, finishes or specialist components connected to this product.
- Rayson SealForce RC30Standalone coating · Polyurea
- Approved primer / baseIncluded when required by the system design
- Correctly prepared substrateSound concrete of at least 25 N/mm² compressive strength and 1.5 N/mm² pull-off
Four project facts for faster system screening.
These current product figures support early selection. Confirm the final build-up, quantity and application conditions against the Technical Data Sheet and site conditions.
- Coverage
- Coverage
- Mixing & working time
- Mixing
- Drying & curing
- Curing
- Pack configuration
- Pack
1.5–1.8 kg/m² total (typically two coats at 0.75–0.9 kg/m² each)
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
Pot life ~30 minutes; 4–6 hours to cure; 6–12 hours between coats; final cure 7 days
Part A 25 kg + Part B 1.5 kg
Confirm the substrate and real service environment before specifying.
Choose it when
- Waterproofing beneath tiling and in bathrooms and wet areas
- Roof waterproofing
- Primary waterproofing membrane in car-park deck systems
- Bridge and tunnel deck waterproofing
- Light metal and fibre-cement roofs
- Over asphaltic membranes
Relevant applications
Relevant industries
Choose something else when
- Apply on a sound, primed substrate — primer depends on absorbency and surface type
- Concrete must reach at least 25 N/mm² compressive and 1.5 N/mm² pull-off strength
- Do not apply below +5 °C
- Flammable during application — keep away from ignition sources and ventilate
- Mix only what can be placed within the ~30-minute pot life
- Application below +5 °C
- Weak or friable concrete below 25 N/mm² compressive strength
- A finished wearing surface for vehicle traffic without a topcoat system
- Application near ignition sources without ventilation
Other Rayson products to evaluate
These links continue the comparison; they are not automatic substitutes. Confirm the substrate, exposure and complete build-up before selection.
Substrate requirements+
- Sound concrete of at least 25 N/mm² compressive strength and 1.5 N/mm² pull-off
- Tiled substrates (as a concealed membrane)
- Metal and fibre-cement roofs (with the appropriate primer)
- Asphaltic membranes
- Primed for the surface type before application
Technical documents and project support
Ready to specify Rayson SealForce RC30? Give Rayson the site conditions.
Send the area, substrate condition, expected traffic or exposure, required finish and programme. The technical team can help review the system build-up and estimated quantity.
What to know before specifying Rayson SealForce RC30.
Can SealForce RC30 be tiled over?
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.
Will it soften on a hot roof or deck?
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.
What substrate strength does it need?
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.
How many coats and how much material?
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.
Is it suitable for car park decks?
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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