Ultracolor Plus is a fast-setting, polymer-modified cementitious grout (CG2 WA) for joints from 2 to 20mm, here in Moon White 103. BioBlock technology resists mould, DropEffect makes the joints water-repellent and easy to clean, and anti-efflorescence properties keep the colour uniform. Suitable for walls and floors, indoors and out, including wet areas, swimming pools and underfloor heating. Colour-matched to Mapesil AC sealant.