Rain or Shine Hydro LockĀ is a super-premium waterproof coating that can withstand both negative and positive pressure. It is durable and applicable where masonry meets water. It seals, protect, beautifies, and is perfect for the most demanding conditions. Superior waterproofer Seals and protects Resists mildew growth Ideal for interior or exterior and a variety of walls Resistant to wind driven rain 4L waterproofer
