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Pale grey porous diatomite bath mat with a fern frond, shower organiser blurred behind

Diatomite

Diatomite is a naturally porous mineral formed from the fossilised remains of diatoms, microscopic algae. Its structure is riddled with pores, so it pulls water in on contact and releases it back into the air within minutes. In a bathroom the mineral solves what a cotton mat cannot: a mat that dries itself never sits damp, so it never develops the smell or the mould that follows.

Diatomite

Properties

  • Fossilised diatom silica: a porous mineral structure formed over millions of years
  • Capillary absorption: draws water in on contact, then releases it back into the air within minutes
  • The pore structure dries the mat, not a coating or a treatment applied afterwards
  • Naturally mould-resistant, because the surface never stays wet
  • Pores can clog with soap residue and skin oils over time, and light sanding reopens them

Care

Stand it up or hang it to air after use. If absorbency slows, sand the surface lightly with 400 grit paper to reopen the pores. Diatomite is never machine washed.

Diatomite FAQs

Why has my diatomite bath mat stopped absorbing water?

The stone’s pores can clog with soap residue and skin oils over time, blocking the capillary action that pulls water in. Light sanding with 400 grit paper reopens the surface.

Can a diatomite mat be washed like a normal bath mat?

No, and this is the one rule that matters: diatomite is never machine washed. Stand it up or hang it to air between uses instead.