Weather Block Exterior Cement Primer

Our most advanced exterior primer. Weather Block Exterior Cement Primer creates an impenetrable defensive barrier that protects walls against rain, alkali, UV and extreme temperature swings for years on end.

When the stakes are high, Weather Block is the professional's first choice. Its polymer-reinforced cement formula penetrates deep into the substrate, forming a dense molecular bond that dramatically improves topcoat adhesion. Suitable for new cement plaster, aged concrete, brick and block construction and it performs equally on high-altitude Himalayan structures and low-lying Terai buildings. One thorough application locks in protection that outlasts multiple paint cycles, making it the smartest long-term investment for any exterior surface.