Wet-area / under-tile waterproofing
- Prepare the substrate and prime for its absorbency
- Apply the first coat of SealForce RC30
- Apply the second coat once the recoat window opens
- Tile or overlay once fully cured
Rayson SealForce · Polyurea
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.
ConcreteCement screedWet areasRoofs TDS RY-TDS-1102
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.
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.
In Malaysia
Supplied by Epovex Coatings Sdn. Bhd., Company No. 202601042128 (1704223-A). The Malaysia launch is scheduled for 1 March 2027; confirm availability and lead time for your project. Installation through an authorised applicator in Johor, Kuala Lumpur or Penang introduced by Rayson, who quotes and warrants the workmanship, or by your own crew with Rayson’s application guidance.
Send an enquiryKey benefits
- Highly elastic (>500% elongation), hydrophobic membrane
- Strong adhesion to concrete (>2.5 N/mm²) and many other surfaces
- Does not soften in heat — serves to 90 °C, tolerates shock to 200 °C
- Stays flexible in the cold to -40 °C
- Locally repairable in a short time
Recommended uses
- 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
Application
- Roller
- Brush
| Specification | Data sheet value |
|---|---|
| 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 and 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 |
Typical systems
Car-park deck waterproofing
- Mechanically prepare and prime the deck
- Apply SealForce RC30 as the primary waterproofing membrane in two coats
- Finish with the specified wearing and anti-slip system
Limitations
- 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
Not suitable for
- 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
Used with
Jobs and industries
Jobs that use Rayson SealForce RC30
Rayson-authorised applicators in Johor, Kuala Lumpur and Penang install Rayson SealForce RC30 on these jobs and in these industries; its layer is marked in each build-up. You can also order it direct and apply it yourself, with the step-by-step guide. Each page shows how the work runs, what to send for a quotation and what decides the price.
Waterproofing systems, applied by an applicator or bought direct
Waterproofing in Malaysia ↗ 01 Rayson system
Polyurea waterproofing
SealForce polyureas: RC40 and RC30 rolled on for roofs, decks and planters, SP200 and the potable-grade SP210 hot-sprayed for tanks, containment and large roofs.
- SealForce RC40 polyurea, two layers, UV-stable and walkable
- The primer its data sheet names for the surface
- Roof or deck slab, cracks repaired, details reinforced
Decks, planters and car park decks: SealForce RC30, rolled on. Tanks, containment and large roofs: SealForce SP200, or the potable-grade SP210, hot-sprayed.
Quoted after inspectionOrder it direct, with a step-by-step guide
02 Rayson system
Waterproof coating
SealForce AC10 acrylic, RC40 and RC30 polyurea and the WB20 wet-area membrane, sold direct with the coverage and a step-by-step guide.
- SealForce AC10, two coats, fleece at moving cracks
- SealForce AP05 primer
- Roof, render or old roof tiles, sound and dry
Flat roofs and decks that are walked on: SealForce RC40 polyurea. Decks and planters under tiles: SealForce RC30. Toilets, under the tiles: SealForce WB20.
Quoted per orderJobs in Johor
03 Rayson system
Balcony, car porch and terrace waterproofing
Surfaces that are rained on and walked on, with a room underneath that must stay dry.
- SealForce RC40 polyurea, exposed and walkable
- Primer to the data sheet
- Screed laid to falls
- Balcony or porch-roof slab
Under new tiles: SealForce WB20 beneath a protected screed. Decks and planters that move: SealForce RC30.
Quoted after inspection 04 Rayson system
Factory and warehouse roof waterproofing
Large flat and metal roofs in Johor’s industrial parks, coated without stopping production.
- SealForce RC40 polyurea on exposed concrete roofs
- Primer to the data sheet
- Roof slab, laps, gutters and penetrations detailed
Metal and free-draining roofs: SealForce AC10, over an anti-corrosion primer on metal or AP05 on concrete. Hot metal and fibre-cement roofs, old bitumen: SealForce RC30. Large roofs: SealForce SP200, sprayed.
Quoted after inspectionBy industry, across Malaysia
Industries we cover ↗ 05 Rayson system
Car park floors
Basement, covered and open car park decks, ramps and walkways in condos, malls, offices and factories: textured epoxy, UV-stable PU and deck waterproofing.
- FloorGuard R50 sealing coat
- FloorGuard R50 broadcast with graded aggregate
- PrimeBond E20 epoxy primer
- Concrete deck, ground and moisture-tested
Pedestrian walkways: GripSafe AP12. Open top deck: UraForce SB72 over PrimeBond S30. A deck that leaks into the level below: SealForce RC30 under the wearing layers.
Quoted after inspection The practical details
Rayson SealForce RC30: questions people ask
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.
Start a conversation / ↗
Send the job, or ask for materials
Tell us what the surface is, where it is and what it has to withstand. Rayson replies with a system recommendation; for installation, the applicator for your area in Johor, Kuala Lumpur or Penang is introduced to quote the job.
Malaysia launch: 1 March 2027. Enquiries are welcome now; supply, site assessment and installation timing are confirmed for each project.