Description
STOPGAP P121 is an acrylic primer designed to promote the application characteristics of STOPGAP 1100 GYPSUM, and other suitable STOPGAP smoothing underlayments, to calcium sulphate screeds e.g. anhydrite. It prevents unacceptably rapid drying of adhesives and smoothing underlayments. It is non-flammable and suitable for use over normal underfloor heating installations. STOPGAP P121 is coloured blue to provide the user with visual control of coverage uniformity.