Tilemaster Flexigrout is a highly versatile, flexible, fast setting wall and floor grout, specially formulated using carefully selected cements and additives. Suitable for use in a wide range of applications, including on surfaces subject to limited movement and/or vibration such as underfloor heating systems. For grouting joints in wall and floor tiles between 3mm – 15mm wide. Suitable for use in areas subject to prolonged or permanent wet conditions such as wet rooms and swimming pools. Can be used internally and externally and it is unaffected by frost after setting. When mixed with Tilemaster Flexmaster Additive, the flexural properties of Tilemaster Flexigrout are enhanced, making it suitable for a wider range of substrates, such as plywood overlay, T & G floorboards, steel and fibreglass. Wet areas such as showers and wetrooms must be left for 3 days before being put into service.