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Waterproofing systems · Johor, KL, Penang · Applied by applicators or sold direct

Polyurea waterproofing in Malaysia: roofs, decks and water tanks

Polyurea waterproofing in Malaysia: SealForce RC40 and RC30 rolled on for roofs and decks, SP200 and potable-grade SP210 sprayed for tanks. From the maker.

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Rayson-authorised applicators in Johor, Kuala Lumpur and the Klang Valley, and Penang. Materials and data sheets nationwide.

What is polyurea waterproofing?

Polyurea waterproofing is a two-part liquid membrane that cures into a tough, elastic, seamless film. Rayson makes it rolled on cold, SealForce RC40 for exposed roofs and RC30 for decks and wet areas, and hot-sprayed, SealForce SP200 and the potable-grade SP210 for tanks and containment.

Before you choose

Which polyurea for which job?

An exposed flat roof that ponds or is walked on: SealForce RC40, UV-stable and walkable. A deck, podium, planter or car park deck under tiles or a wearing layer: SealForce RC30. A water tank, effluent pit, bund or below-grade structure: SealForce SP200 sprayed, or SP210 where the water is for drinking.

The rolled membranes go on by roller or brush at the data-sheet build, RC40 at 1 to 1.2 kg/m² over two layers and RC30 at 1.5 to 1.8 kg/m² in two coats. The sprayed ones build 1.5 mm and more, 2.5 to 3.0 mm in water-retaining structures for SP200, and are walkable within minutes.

Polyurea or polyurethane: what is the difference?

Both are elastic liquid membranes; polyurea is the fast-curing one. Sprayed SealForce SP200 gels in 5 to 10 seconds, is walkable in about two minutes and takes light traffic in 15 to 20 minutes, and rolled RC30 cures in 4 to 6 hours. That speed is why polyurea suits tanks, decks and roofs that cannot stay out of service for long.

Rayson’s polyurethanes, the UraForce range, are floor coatings rather than waterproofing membranes, and the PU flooring page sets them out. Under the tiles of a toilet, the simpler membrane is the one-part, water-based SealForce WB20.

Can polyurea line a drinking-water tank?

Yes: SealForce SP210 is the potable grade, certified for contact with drinking water (WRAS, to BS 6920), sprayed as a seamless lining on concrete and steel tanks and reservoirs and walkable about ten minutes after spraying. The tank is filled only after the longer cure the certificate requires, which its data sheet sets out.

The certificate and the data sheet go into the submission to your water operator or consultant before the lining is specified. SP200 is the general-purpose sprayed membrane for waste water, containment and below-grade work.

Who sprays it, and can we order it ourselves?

RC40 and RC30 are rolled on, so the Rayson-authorised applicator for your area inspects, quotes per square foot and applies them, or your own contractor orders them direct. SP200 and SP210 are hot-sprayed with heated, high-pressure plural-component equipment, so only specialist spray applicators apply them: the enquiry confirms the applicator for your site, and spray contractors can order the material direct.

Every polyurea goes on over the primer its own data sheet names for the surface, never the SealForce AP05 acrylic primer, which is only for the AC10 roof system. Concrete is prepared to sound, and for the sprayed systems abrasive-blasted, with blowholes filled; steel is grit-blasted and coated before flash rust returns.

Four Rayson polyureas, side by side

SealForce RC40SealForce RC30SealForce SP200SealForce SP210
How it goes onRoller, brush or spray, coldRoller or brush, coldHot spray, plural-componentHot spray, plural-component
Build1 to 1.2 kg/m² over two layers1.5 to 1.8 kg/m² in two coats1.5 mm and up; 2.5 to 3.0 mm in water-retaining structuresTypically 1.5 mm in one coat, 1 litre/m² per mm
SuitsExposed flat roofs that pond or are walked onDecks, planters, car park decks, wet areas under tilesTanks, waste water, bunds, below-grade, large roofsDrinking-water tanks and reservoirs; WRAS-certified to BS 6920
In the sunUV-stable, with cool-roof reflectanceUsed exposed on roofs, or covered by tiles or a wearing layerMay discolour in UV; performance unaffectedAlso used on reservoir roofs and water towers
Back in serviceRain-resistant after 3 hours; full cure in about 7 days4 to 6 hours to cure; final cure in 7 daysWalkable in about 2 minutes; light traffic in 15 to 20Walk-on in about 10 minutes; tanks filled after the full potable cure
Applied byThe Rayson-authorised applicator, or your contractorThe Rayson-authorised applicator, or your contractorA specialist spray applicatorA specialist spray applicator

From the data sheets. The specification confirms the membrane, primer and build for your structure.

Where it suits

Where it is used

  • A flat roof that ponds, or that people walk on
  • A podium, deck or planter that leaks into the floor below
  • A car park top deck that leaks onto the cars beneath
  • A concrete water tank leaking from its walls or floor
  • Effluent pits, waste-water tanks and chemical bunds
  • A large roof that has to be back in service quickly
Where it goes wrong

Why these jobs fail

  • A polyurea laid over a primer that is not its own, so it lifts
  • Sprayed on a damp surface, or below the dew point, so it blisters
  • Concrete not blasted or its blowholes left open, so pinholes come through
  • A cement-based coat in a tank, deck or planter that moves and cracks
  • Detail strips skipped at outlets, joints and penetrations, where water gets in first
How the membrane goes on

From the bare surface to a watertight finish

  1. Survey and trace

    Where the water enters, what the structure holds or carries, the substrate and its strength (RC30 asks for at least 25 N/mm² compressive and 1.5 N/mm² pull-off), and how long it can be out of service.

  2. Prepare and prime

    Concrete ground or blasted to sound, cracks and spalls repaired, blowholes filled; steel grit-blasted. Then the primer each membrane’s data sheet names for the surface.

  3. Detail, then the membrane

    Outlets, joints, corners and penetrations reinforced first; then RC40 or RC30 rolled on at the data-sheet build, or SP200 or SP210 sprayed to the specified thickness, within the temperature and humidity limits.

  4. Test and return to service

    Flood test or rain check on roofs and decks; thickness records for sprayed linings; a tank goes back into service, and a drinking-water tank is filled, only after the cure its data sheet sets.

What to send

Three details are enough for a system recommendation

  1. The structure, wide: roof, deck, planter, car park deck or tank
  2. Where the water comes in, or the worst patch, close
  3. The area in m² or sq ft, what the structure holds or carries, and the town

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What it costs

What does polyurea waterproofing cost in Malaysia?

Rolled on by a Rayson-authorised applicator, polyurea waterproofing is quoted per square foot after inspection; sprayed linings are quoted per project by the spray applicator. Five things decide it: the area, the preparation (grinding or blasting, repairs, blowholes), the membrane and its build, the details at outlets, joints and penetrations, and access and the time the structure can be out of service. Material ordered direct is quoted per order. Rayson publishes no price list.

Who stands behind the job

  • Rayson makes the materials, writes the specification and warrants the material. It supplies them direct in Malaysia through Epovex Coatings Sdn. Bhd., with the data sheets; supply and delivery are confirmed for each order.
  • The Rayson-authorised applicator for your area an independent company authorised by Rayson, contracts with you, inspects, quotes, applies the rolled membranes and warrants the workmanship; sprayed linings are applied by a specialist spray applicator. Or your own contractor orders the material and applies it to the data sheet.
  • Rayson is not the installer and is not a party to the installation contract. Two warranties, two companies.
Where we work

Polyurea waterproofing in Johor, Kuala Lumpur and Penang

  • Johor Bahru
  • Iskandar Puteri
  • Pasir Gudang
  • Senai
  • Kulai
  • Kuala Lumpur
  • Petaling Jaya
  • Shah Alam
  • Subang Jaya
  • Penang

Independent, Rayson-authorised applicators in Johor, Kuala Lumpur and the Klang Valley, and Penang. Sites elsewhere are confirmed per enquiry; materials and data sheets are supplied nationwide.

Rayson materials on this job

Every layer has a published data sheet

Layers, top to bottom: 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

The build-up, top to bottom · diagram, not to scale

  1. SealForce RC40 polyurea, two layers, UV-stable and walkable
  2. The primer its data sheet names for the surface
  3. 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.

Rayson SealForce RC40 pail

Rayson SealForce RC40

Rayson SealForce RC40 is a two-component, cold-applied aliphatic polyurea waterproofing membrane for exposed roofs — roller-, brush- or spray-applied, UV-stable and walkable, with certified cool-roof reflectance.

Specifications →
Rayson SealForce RC30 pail

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.

Specifications →
Rayson SealForce SP200 pail

Rayson SealForce SP200

Rayson SealForce SP200 is a hot spray-applied, 100% solids, rapid-curing pure polyurea membrane that forms a seamless, chemically resistant waterproof and protective lining on concrete and steel.

Specifications →
Rayson SealForce SP210 pail

Rayson SealForce SP210

Rayson SealForce SP210 is a hot spray-applied, 100% solids pure polyurea membrane that forms a seamless, potable-grade waterproof lining on concrete and steel tanks, reservoirs and containment structures.

Specifications →
The Rayson difference

An installer buys whatever is on the shelf. A Rayson-authorised applicator installs what Rayson makes.

01

The maker writes the specification

The system is specified by the company that makes the material, and installed by an independent applicator Rayson has authorised, not chosen from whatever a supplier had on the shelf that week.

02

A data sheet for every layer

Every Rayson material on your floor or roof has a published technical data sheet. You can read what went in, and so can your consultant.

03

Two warranties, two companies

Rayson warrants the material as its maker. The authorised applicator, an independent company that contracts with you, warrants the workmanship. Each warranty is issued by the company responsible for it.

04

Same materials on both sides of the Causeway

The products, data sheets and application methods are the ones Rayson publishes in Singapore. Nothing is rebadged for Malaysia.

05

Materials direct, for your own crew

Contractors and facility teams buy the same materials direct from the maker, with application guidance. The applicator is there when you want the job done for you.

Related jobs

Where polyurea is used, and the alternatives

Each with the Rayson layers it uses

Waterproofing in Malaysia ↗
01 Rayson system Layers: SealForce RC40 polyurea on exposed concrete roofs; Primer to the data sheet; Roof slab, laps, gutters and penetrations detailed

Factory and warehouse roof waterproofing

Large flat and metal roofs in Johor’s industrial parks, coated without stopping production.

  1. SealForce RC40 polyurea on exposed concrete roofs
  2. Primer to the data sheet
  3. 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 inspection
02 Rayson system Layers: FloorGuard R50 sealing coat; FloorGuard R50 broadcast with graded aggregate; PrimeBond E20 epoxy primer; Concrete deck, ground and moisture-tested

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.

  1. FloorGuard R50 sealing coat
  2. FloorGuard R50 broadcast with graded aggregate
  3. PrimeBond E20 epoxy primer
  4. 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
03 Rayson system Layers: Tiles, bedded and grouted with SealForce RW1; Screed with RW1 in place of the mixing water; SealForce WB20, two coats, where the room needs a membrane; Concrete or render, cleaned, roughened and repaired

Cementitious waterproofing

SealForce RW1 waterproof cement for slurry coats, renders and screeds, with SealForce WB20 as the membrane where cracks move: no bitumen sheets, and the honest line where cement stops.

  1. Tiles, bedded and grouted with SealForce RW1
  2. Screed with RW1 in place of the mixing water
  3. SealForce WB20, two coats, where the room needs a membrane
  4. Concrete or render, cleaned, roughened and repaired

Walls and floors with no membrane: a slurry coat of RW1, cement and sand on the old concrete, then the render or screed with RW1. Basements and tanks: SealForce SP200, sprayed.

Quoted after inspection
04 Rayson system Layers: SealForce RC40 polyurea, details first, then the whole roof; Primer to the data sheet, fleece at moving cracks; Flat or porch-roof slab, cracks and falls repaired

Roof and ceiling leak repair in KL and Selangor

Flat roofs, porch roofs, tiled roofs and factory metal roofs in the Klang Valley: the leak traced, then the Rayson membrane that suits the roof.

  1. SealForce RC40 polyurea, details first, then the whole roof
  2. Primer to the data sheet, fleece at moving cracks
  3. Flat or porch-roof slab, cracks and falls repaired

Roofs that drain freely and old roof tiles: SealForce AC10 over AP05 primer. Metal roofs: AC10 over an anti-corrosion primer, with fleece at the laps.

Quoted after inspection
05 Rayson system Layers: SealForce AC10, two coats, fleece at moving cracks; SealForce AP05 primer; Roof, render or old roof tiles, sound and dry

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.

  1. SealForce AC10, two coats, fleece at moving cracks
  2. SealForce AP05 primer
  3. 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 order
The practical details

Questions people ask

Is polyurea better than an acrylic roof coating?

For a roof that ponds or is walked on, yes: SealForce AC10 acrylic is made for roofs that drain freely and are not walked on, and its data sheet rules out long-term ponding. Where a roof drains well and nobody walks on it, AC10 over AP05 primer is the economical membrane.

Can polyurea go over our old membrane?

Often, over a sound one: RC40 lists bitumen, PVC and TPO single-ply and old liquid membranes among its substrates, and RC30 lists asphaltic membranes. A loose or blistered membrane comes off first, and a trial area confirms the bond.

Does a sprayed polyurea change colour?

SealForce SP200 is an aromatic polyurea and can discolour under prolonged UV; its data sheet says this is cosmetic and does not affect the waterproofing. Where appearance matters on an exposed roof, the specification names a UV-stable topcoat, or the roof takes RC40, which is aliphatic and UV-stable.

My water tank is leaking: can polyurea fix it?

A concrete or steel tank, yes: it is drained, cleaned and blasted, the cracks and blowholes repaired, then SealForce SP210, certified for contact with drinking water (WRAS, to BS 6920), is sprayed as a seamless lining for drinking water, or SP200 for other water, and the tank is filled after the cure its data sheet sets. A plastic or polyethylene household tank is not a job for a membrane; it is replaced. The applicator looks at the tank, and at whether the leak is a pipe or a fitting, before anything is quoted.

Can a cement waterproofing do the same job in a tank?

Not as a lining. Rayson SealForce RW1 waterproofs the cement render or screed it is mixed into, and its data sheet rules out water-retaining structures and permanent immersion. Tanks, pits and reservoirs take a seamless polyurea lining instead.

Who gives the warranty?

Rayson warrants the membrane as its maker when it is applied to the data sheet; the applicator, the Rayson-authorised applicator or the specialist spray applicator, warrants its workmanship, and both are written into the quotation. A membrane applied by your own contractor carries that contractor’s workmanship terms.

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.

Thank you. Your enquiry has been received and we reply within one working day, Monday to Friday.

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