What Brazilian slate and adhesive products will be best for an area which is prone to flooding?

Hello Martyn

The Brazilian multicolour slate would work really well in a wet room installation and would recommend either the 1 part Rapid set adhesive (no underfloor heating) or the Ultimate flex (with underfloor heating).

Once set, the adhesives will be water resistant but could be subject to failure if flooded (underwater) for prolonged periods of time as these products are not designed for full immersion.