Caulking is usually a final stage in tiling process, when all tiling and grouting is done. Silicone is applied in 90-degree corners, this prevents the water from getting behind the tiles (floor to walls corners, walls to ceiling, mitre cuts, around the cabinets etc.). Caulking is not just for the bathrooms or any wet areas. It is also for any part of the house (bottom of the mdf skirting boards, joinery) inside and outside of the house. We are using only the best leading companies on tiling market.