To waterproof a bathroom or kitchen, tank the wet areas — behind shower tiles and under-tile floors — with Megaflex cementitious waterproofing, then finish the walls with a washable paint or a water-based enamel. Use UltraLux (washable, UV-stable) or High Sheen Enamel (water-based, for high-splash surfaces) on the walls, and a mould-resistant Ceiling White on the ceiling. An ordinary wall waterproofer is not the right tool inside a wet room.
Best coating for a bathroom or kitchen
Match the product to the zone. Constant-water areas need a cementitious membrane; splash and steam areas need a washable, moisture-tolerant finish:
| Zone | Best product |
|---|---|
| Behind shower tiles, under-tile floors, wet areas | Megaflex cementitious waterproofing (tank before tiling) |
| Bathroom / kitchen walls | UltraLux washable, or High Sheen Enamel on high-splash surfaces |
| Ceiling | Ceiling White (treat mould first) |
Does waterproof paint work in a bathroom?
Yes on the walls and ceiling, no inside the shower. A washable wall finish and a mould-resistant ceiling paint handle the steam, splashes and condensation of a bathroom or kitchen. The shower enclosure itself takes constant direct water, so it needs a cementitious membrane like Megaflex tanked behind the tiles — paint is not a shower waterproofing.
Walls, ceilings, showers and tiles
- Walls. Washable UltraLux, or High Sheen Enamel where splashing is heavy.
- Ceilings. Mould-resistant Ceiling White; treat existing mould with a biocide first.
- Showers and wet floors. Tank with Megaflex before tiling; the membrane, not the paint, keeps water out.
- Tiles. Paint bonds poorly to glazed tile and does not waterproof a wet shower — tank behind the tiles instead.
Preventing mould in a bathroom
Mould is a moisture-and-air problem before it is a paint problem. Vent the room with an extractor fan or open window, wipe down surfaces, treat any existing growth with a biocide, and finish with a mould-resistant coating. A washable wall paint lets you clean spores off before they take hold.
Kitchens: splashbacks and behind the stove
Kitchen walls take grease and steam as well as splashes. Use a water-based High Sheen Enamel on high-splash surfaces and behind the stove, where the harder, washable film wipes clean. Degrease the wall before coating, or the new film will not bond.
How to do it
- In the shower and on wet floors, apply Megaflex in two coats over a clean, primed substrate, then tile over it.
- On the walls, clean off soap film and grease, treat mould with a biocide, repair cracks, prime bare plaster, then apply UltraLux or High Sheen Enamel in two coats.
- Coat the ceiling with Ceiling White and ventilate the room well while everything cures.
Frequently asked questions
What is the best waterproof paint for a bathroom? Tank the wet areas with Megaflex, then finish the walls with washable UltraLux or a water-based High Sheen Enamel and the ceiling with Ceiling White.
Does waterproof paint work in a bathroom? Yes on walls and ceilings that take steam and splashes. The shower enclosure needs a cementitious membrane tanked behind the tiles, not paint.
How do I stop mould on bathroom walls? Ventilate the room, treat the growth with a biocide, and finish with a washable, mould-resistant coating.
What is the best paint for a bathroom ceiling? A mould-resistant Ceiling White over a clean, biocide-treated surface.
Where to buy
Shop Megaflex, UltraLux and High Sheen Enamel, or read the complete waterproofing guide. Trade pricing: +27 84 985 6141.
