Material

Shower tray

An acrylic or gelcoated stone resin surface that behaves like acrylic, with a silicone joint and a waste that hold the residue.

  • SurfaceNon porous
  • WashingSpot only
  • Colour run riskLow
  • Reviewed7 September 2026

What shower tray can and cannot take

  • Heat Avoid
  • Water and soaking Tolerates it
  • Acids, including vinegar Use with care
  • Strong alkalis Use with care
  • Solvents Avoid
  • Chlorine bleach Avoid
  • Abrasives Avoid

General rules for shower tray

The tray itself is easy. Warm soapy water and a soft cloth, no abrasives, no solvents.

The difficulty is the edges. A shower tray meets the wall and the enclosure in a silicone joint, and that joint is exactly where liquid runs and where a smell develops. Work along it with a soft brush.

The waste is the other place. Lift the grille out, clean underneath it and flush the trap through, because milk residue in a shower waste sours very quickly in a warm wet room.

Check the label

Most shower trays are acrylic or stone resin with a gelcoat surface, and both behave like acrylic: soft, scratched by abrasives and damaged by solvents and strong bleach. The silicone joint at the edge and the waste are where the residue actually collects.

Stains on shower tray

A shower tray is a moulded acrylic or stone resin pan with a gelcoat finish, sealed to the wall with silicone.

The surface is soft

Like an acrylic bath, it scratches with abrasives and crazes with solvents, and a scratched or textured tray holds soap and dirt in the scratches.

The joint is the weak line

Silicone at the perimeter is where liquid runs to. It is porous enough at the surface to hold organic residue, which is what mould feeds on, and it is where a smell in a shower usually comes from.

The waste is warm and wet

Which is the ideal environment for milk residue to sour. Most shower wastes have a lift out grille and a trap that unscrews.

It cannot be treated like tile

Despite being surrounded by it. The tile takes bleach and abrasives that the tray does not.

Sources

What we checked and when. Where a manufacturer instruction disagrees with anything here, follow the manufacturer.

  1. Bathroom care guide, Carryduff Designs manufacturer

    UK bathroom supplier guidance that acrylic is softer than china and scratches, that scouring products are not recommended, that chemicals including nail varnish remover, household bleach, perfume and strong disinfectant must never be used on acrylic, that warm soapy water or a mild cream cleaner is the correct clean, that mild limescale removers are acceptable occasionally, that bleach must not go in a cistern, and that cleaners must never be mixed because they give off poisonous gas.

    Checked 7 September 2026

  2. Cleaning grout, Tile Council of North America trade body

    Tile trade body guidance that grout manufacturers do not advocate the use of acids because acids attack the cement in the grout, that grout is alkaline based and is dissolved by acids, that mildly alkaline cleaners are preferred over acidic ones, that oil and wax based cleaners leave a film that attracts dirt, that alkaline cleaner not properly rinsed leaves a sticky residue, and that cementitious grout should be sealed to prevent staining.

    Checked 7 September 2026

  3. Norovirus: what to do and how to stop the spread, UK Health Security Agency authority

    UK public health guidance establishing that illness related vomit can carry norovirus, that contaminated laundry should be washed with normal powder at 60 C where the care label permits, and that compatible hard surfaces should be disinfected with a bleach based product.

    Checked 7 September 2026