Bituminous App Primer (25l)

APP Primer (25L) is a high-performance, solvent-based bituminous primer formulated from oxidized bitumen and fast-evaporating solvents. Engineered to penetrate and seal porous surfaces, it ensures optimal adhesion of APP torch-on membranes to concrete, metal, or masonry substrates. With quick drying times (typically within 2–4 hours depending on temperature and humidity), it enhances waterproofing system performance and minimizes installation delays. Ideal for use before applying bituminous membranes or as a rust-inhibiting primer for metal surfaces. Coverage: approx. 4–6 m2/L, depending on surface porosity.