Everbuild 507 Rendagrip is an extra grip render bonding agent that contains a fine aggregate to provide an improved key before applying render on external surfaces. It is suitable for use on concrete, lightweight blockwork, brick, and other similar substrates. The fine aggregates are suspended in a unique waterproof polymer, ensuring easy application by roller or brush and an even spread of aggregate. This prevents weak spots in the key coat and stops aggregate particles from coming loose during application. 507 Rendagrip reduces the porosity and suction of the base substrate, providing a mechanical key from the fine aggregate suspended within the product. Volume: 10000ml.