Wall seepage repair in Johor Bahru: damp, peeling or mouldy walls traced to rain, a wet room behind or rising damp, and fixed 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.
Wall seepage is water soaking through a wall from the outside, from a wet room beside it or from the ground, until the paint bubbles, the plaster stays damp or mould grows. Painting over it does not stop it; the repair is made on the side the water comes from.
Rain seepage grows after storms, on walls that face the weather, at any height. Rising damp stays near the floor, leaves a tide mark and white salts, and changes little with the weather. A wall next to a bathroom gets worse after showers instead.
The applicator takes moisture readings inside and out, and looks at the outside face and whatever sits behind the wall, to confirm which before quoting.
No. It traps the water in the wall and the paint fails again. The repair is on the side the water comes from.
Inside, the wall is only dried, skimmed and repainted once the outside face, the wet room behind or the base of the wall has been dealt with.
The waterproofing in that bathroom has to be redone, which is the neighbour’s job in most cases. The applicator can inspect both sides and put the cause in writing.
That written finding helps both owners, or the management in a strata building, agree on the repair before anyone repaints.
After the external repair, the wall needs dry weeks rather than days to give up the water it holds; the applicator checks with a moisture meter before redecorating.
Painting too early seals the water in again, so the moisture reading, not the calendar, decides when the inside is skimmed and painted.
| Compared on | SealForce AC10 on the outside face | Re-render with SealForce RW1 | Waterproof paint inside | Sealant in the cracks |
|---|---|---|---|---|
| What it is | An acrylic membrane over AP05 primer | New render with a latex additive that resists water | A paint on the inside face | Sealant pressed into each crack |
| Rain through the outside render | The repair | Where the render is replaced | Does not stop it | Until the next crack opens |
| Rising damp at the base | Not the repair | The repair, at the base of the wall | Does not stop it | Not the repair |
| A wet room behind the wall | Not the repair: that room is waterproofed | Not the repair: that room is waterproofed | Does not stop it | Not the repair |
| Where the water goes | Kept out of the wall | Kept out of the render | Trapped in the wall | Into the next crack |
A first guide. The applicator confirms the cause with moisture readings before quoting.
Moisture readings inside and a look at the outside face and whatever sits behind the wall.
Cracks raked out and filled, the surface cleaned and primed with SealForce AP05.
External face: SealForce AC10 membrane. Wet area behind: re-waterproof it. Rising damp: hack back and re-render with RW1 in the mix.
The wall is left to dry before the inside is skimmed and painted.
Per square foot of wall treated, quoted after inspection. Five things decide it: the cause, the wall area, the cracks to repair, access to the outside face (from the ground or with scaffolding), and drying out and redecorating inside. Repairing the outside face is the smaller job; re-waterproofing a bathroom behind the wall is a toilet job in its own right. 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
Water from a wet area behind the wall: that room is re-waterproofed instead.
Rayson SealForce AC10 is a one-part, water-based acrylic waterproofing membrane for exposed roofs, old roof tiles and external walls — applied cold, straight from the pail, by brush, roller or airless spray, and drying to a seamless, elastic, UV-resistant film.
Specifications →
Rayson SealForce AP05 is a one-part, water-based acrylic primer for the SealForce waterproofing range — brushed or rolled onto concrete, render, brick, stone and roof tiles to seal pores, bind dust and give SealForce AC10 a firm surface to bond to.
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 inspectionThe membrane under the tiles, done once and flood-tested before the tiler starts.
Flat concrete, tiled and metal roofs: the cause found first, then a membrane over the whole roof.
Flat roofs that pond or are walked on: SealForce RC40 polyurea.
Quoted after inspectionYes. Contractors with their own crews can order SealForce AC10, AP05 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 the membrane and additive 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.