Yellostone microtopping
Microtopping for bathrooms and showers
A bathroom with no grout lines, and no demolition.
Yellostone microtopping covers the floor, the walls and the shower in one continuous surface. It goes on at 2 to 3 mm straight over the existing surface: with the bonding primer, it bonds to almost any substrate, old tiles included once they are prepared. No stripping out, no rubble, and no more grout to clean.
Why it lasts in a bathroom
- Cement-free, it does not crack. Unlike cement-based microcement.
- A complete system: three coats of microtopping, then two coats of varnish that protect against water and stains.
- Easy to clean: water and a mild soap are all it needs.
How long does it take?
Allow 4 to 5 days on site. The substrate is prepared, then covered with primer, three coats of microtopping and two coats of varnish. The shower can take water after 3 days; the bathroom is back in normal use after 7 days.
The product does not dry out in the tub, so you work at your own pace. A careful DIYer can apply it; for a walk-in shower, we recommend a trained applicator.
Choosing a bathroom colour
120 shades, from whites to blacks, through beiges, greys and earth tones. Order a 30 × 30 cm sample to see the colour and the texture at home.
What surfaces can microtopping go on?
| Substrate | Application | Main condition |
|---|---|---|
| Cement screed or slab | Suitable | Sound, dry, stable and prepared substrate |
| Underfloor heating | Suitable, following the protocol | Heating run beforehand, stability, movement joints respected |
| Existing tiles | Possible after inspection | Adhesion, stability, sanding and the right primer |
| Plasterboard on walls | Suitable | Rigid boards, treated joints and preparation |
| Wood or wood-based panels | Suitable except solid wood | Dimensional stability and sound assembly (screwed and glued) |
| Terracotta or damp substrate | Not recommended on substrates soaked deep with old oil or wax. Max. moisture 5% | Surface and moisture check required beforehand |
Frequently asked questions
Can you use microtopping in a shower?
Yes. The complete system, with its two coats of varnish, is designed for showers.
Can microtopping go over bathroom tiles?
Yes, once the grout lines have been filled with a skim to zero. See our page on microtopping over tiles.
How much microtopping do I need?
Yellostone microtopping is sold by the m²: all you need to know is the area to cover.