Toilet waterproofing in Johor Bahru, done once: tiles off, Rayson SealForce WB20 under new tiles, a 24-hour flood test, by an authorised applicator.
We reply within one working day, Monday to Friday.
Also in Kuala Lumpur and the Klang Valley, and Penang, through authorised applicators there.
Toilet waterproofing is a membrane under the floor tiles, turned up the walls, that stops shower water reaching the slab and the ceiling below. The Rayson-authorised applicator lays SealForce WB20 in two coats and flood-tests it for 24 hours before the tiles go back.
A surface sealant over tiles is a temporary measure, not waterproofing: water still reaches the screed through the grout. The lasting repair puts the membrane under new tiles.
Grout sealers, clear coats and injection can slow a leak for a while, but none of them rebuilds a membrane that has failed or was never there. That is why the quotation strips the floor to a sound screed first.
After the membrane has cured, the floor trap is plugged and the floor is filled with water for 24 hours while the ceiling below is checked. The tiler starts only if that ceiling stays dry, so a missed detail is found before the tiles hide it.
The floor trap, the floor-to-wall junction and every pipe through the floor are where most toilet leaks start, so they are reinforced before the membrane goes down.
Yes, as the finish over the waterproofing, not instead of it. IFS Epoxy Flake Lining goes on bathroom walls and floors, but it is not a waterproofing membrane, so the waterproofing under the floor is checked first.
Where it is needed, SealForce WB20 goes in first and the applicator confirms the combined build-up on a sample board. The metallic and flake epoxy page shows the finish.
SealForce RW1 is a latex additive mixed into the screed, render and tile adhesive so the cement layers themselves resist water and bond better. It works with the membrane, not instead of it.
With WB20 under the tiles and RW1 in the cement layers around it, the floor resists water at more than one layer instead of relying on one thin line.
| Compared on | SealForce WB20 under new tiles | Clear coat over the tiles | Regrouting or grout sealer | Injection into the slab |
|---|---|---|---|---|
| What it is | A membrane on the screed, under new tiles | A transparent coating on the tile surface | New grout, or a sealer on the old grout | Resin injected into the cracks |
| Where water is stopped | Before it reaches the screed and slab | At the tile surface, while the coat holds | At the grout lines | At the cracks injected |
| Floor trap and wall junction | Reinforced before the membrane | Coated over | Not reached | Only where injected |
| Your tiles | Lifted and relaid | Kept | Kept | Kept |
| For a failed membrane | The lasting repair | Temporary | Temporary | Slows it for a while |
A first guide. The applicator confirms the repair your toilet needs on site.
Tiles and old screed off to a sound base; the floor trap and pipe penetrations exposed and cleaned.
The floor-to-wall junction and the floor trap reinforced before any membrane goes down.
Rolled on and turned up the walls to the data sheet height; RW1 in the new screed and the tile bed.
The floor holds water for 24 hours with no mark below before the tiler starts.
Per toilet, quoted after inspection. Five things decide it: the floor and wall area, lifting and relaying the tiles, the state of the screed, the floor trap and pipes to detail, and the new tiles. Removing and relaying the tiles is most of the bill; the membrane is the smaller part, which is why it should never be skipped. Rayson publishes no price list.
Also in Kuala Lumpur and the Klang Valley, and Penang, through Rayson-authorised applicators there; availability confirmed per enquiry.
The build-up, top to bottom · diagram, not to scale
Rayson SealForce WB20 is a one-part, water-based, polyurethane-modified waterproofing membrane for toilets, showers, bathrooms, balconies and other interior wet areas — rolled or brushed on in two coats and concealed beneath the tiles, screed or render.
Specifications →
Rayson SealForce RW1 is a one-part latex waterproofing and bonding additive for cement-based work — mixed into renders, screeds, slurry coats, tile adhesives and grout to cut water penetration, strengthen the mortar and improve its bond and flexibility.
Specifications →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.
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.
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.
The products, data sheets and application methods are the ones Rayson publishes in Singapore. Nothing is rebadged for Malaysia.
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.
Each with the Rayson layers it uses
All jobs in Johor ↗Read the stain first: toilet above, roof, pipe or wall each need a different repair.
Under a roof: a roof membrane instead. A steady drip in any weather: a plumber first.
Quoted after inspectionDamp, peeling, mouldy walls: rain through the render, rising damp or a leak next door.
Water from a wet area behind the wall: that room is re-waterproofed instead.
Quoted after inspectionSeamless cement finish over floors, walls and showers, with Rayson waterproofing underneath where it is wet.
Dry floors: PrimeBond E20 primer in place of the membrane, or a bonding primer over firmly bonded tiles.
Quoted after inspectionTypically five to seven days: stripping and preparation, membrane and curing, the 24-hour flood test, then tiling and grouting. The quotation states the programme.
Yes. Contractors with their own crews can order SealForce WB20 and RW1 from Rayson with the data sheets and application guidance; the authorised applicator is there when you want the job done for you.
Rayson warrants WB20 and RW1 as their maker; the Rayson-authorised applicator warrants its workmanship. Both are written into the quotation.
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.