Create neat, durable grout joints with Ultracolor Plus Terra di Sienna 145 Flexible Grout 5kg. This fast-setting flexible grout is suitable for joints from 2mm to 20mm and can be used on walls and floors, indoors and outdoors. BioBlock technology helps resist mould growth, while DropEffect helps repel water and makes grout joints easier to keep clean. Its anti-efflorescence formula helps maintain an even colour, while the Terra di Sienna 145 shade coordinates with matching Mapesil AC silicone for a consistent finish.