RLA Porous Primer – Water-Based Primer

RLA Porous Primer is a fast-drying, water-based acrylic primer formulated to promote strong adhesion of RLA waterproof membranes, tile adhesives, and repair mortars over porous substrates. It provides a stable, sealed surface that improves membrane bond strength and prevents pinholes or premature drying.

Suitable for a wide range of substrates including concrete, render, screeds, fibre cement sheeting, and plasterboard, this primer is designed for both internal and external use. It is ready to use straight from the container and dries quickly, helping to reduce downtime on site.

Ideal for use before applying RLA waterproofing membranes or adhesive systems, RLA Porous Primer ensures reliable adhesion and surface preparation across new builds and remedial works.