TRUBUILD WRP 777 is a silane-based, water-soluble, non-flammable water repellent treatment developed to protect porous construction surfaces from moisture penetration while preserving their original appearance. Unlike conventional surface coatings that create a visible film, WRP 777 penetrates deeply into the substrate and forms a water-repellent barrier within the pores without changing the natural texture, colour, or finish of the surface.

The product is designed for waterproofing and protection of surfaces such as sandstone, marble, concrete, exposed brickwork, terracotta tiles, plasters, and other porous materials. Its low-viscosity formulation enables deeper penetration, helping reduce water ingress, minimise efflorescence, improve weather resistance, and extend substrate life.

One of its major advantages for customers is that it remains breathable—allowing trapped moisture vapour to escape while preventing external water absorption. This helps maintain surface durability and appearance over time. The product is supplied in a ready-to-use format, eliminating on-site dilution and simplifying application.