Onyx Grigio is an intense marble decor built around an intricate pattern of dark-grey veining running through a mixture of light and dark greys, for a genuinely dramatic, statement finish. The Polished finish adds extra depth and shine, making the veining stand out even more against the light. Like every panel in the Elite Collection, it's fitted with tongue and groove joints and sleek post-formed edges for a completely seamless finish — no grout, no sealant lines breaking up the pattern, just one continuous surface from floor to ceiling.
100% waterproof
No grout
Tongue & groove seamless finish
Lifetime guarantee*
Where this works
- Full wet room wall coverage — panels can extend beyond the bath/shower area for a co-ordinated look
- Can be cut and combined to form custom waterproof windowsills and shower niches
- Not designed to carry the weight of taps, shelving, or fittings — these must be fixed through the panel into the wall structure
Install time
~2.5 hrs (full surround)
Joints
Tongue & groove, trim-free
Required adhesive/sealant
Wilsonart Complete Adhesive & Sealant
Part of the Elite Collection. Browse more Marble finishes, or see the full Wetwall range comparison.
Launch DateAugust 13, 2026
Days In Market74
VendorWetwall
Variants5