Rapid Set Flexible Grey is a fast setting, highly polymer fortified adhesive mortar for use on walls and floors in external and internal applications. It is formulated with Rock-Tite polymer binders to impart flexibility, water resistance and increased strength. The product incorporates excellent thermal ageing properties making it ideal for use with both underfloor and undertile heating systems and stable plywood overlay floors.

Rapid Set Flexible Grey conforms to BS EN 12004, classification C2FT.

General information

Uniclass 2015

Pr_20_31_53_65 Polymer-modified cementitious mortarsPrimary


M40/10 Natural stone covering to

M40/110 Tiling to

M40/115 Natural stone covering to

M40/120 Mosaic to

M40/5 Tiling to

Specification data - Polymer-modified cementitious mortars

Product Reference

Rapid Set Flexible Grey tile and stone adhesive

Thickness (bed depth)


3–8 mm; up to 12 mm in isolated areas.