Stopgap Fill & Prime - Cement Based Primer

Stopgap Fill & Prime – Flexible Cement Primer

Stopgap Fill & Prime is a fast-drying, two-component, cement-based primer designed for raised access panels and surfaces with well-bonded adhesive residues. It forms a flexible base that fills joints up to 4 mm wide, allowing for a smooth transition and better adhesion of subsequent smoothing compounds.

Key Features & Benefits:

• Thixotropic consistency for easy joint filling in raised access panels

• Applied up to 1 mm thickness on horizontal surfaces; walk-on in about 60 minutes

• Flexible once cured—accommodates minor movement in substrates

• Strong adhesion to a wide range of subfloors, including plywood, OSB, concrete, screeds, tiles, and waterproof membranes

• Low odour, protein-free formulation—suitable for sensitive environments

Coverage:

• Approximately 20 m² per 5-6 kg kit at 0.2 mm thickness

• Around 8.5 m² at 0.5 mm thickness