Crystal Seal

Permacolour Crystal Seal is a ready-for-use (simply add water) cement-based waterproofing slurry. It consists of a blend of cement, graded quartz and active chemical constituents. It is supplied as a fine, grey powder. The material waterproofs sound concrete or a cement surface against dampness, groundwater and hydrostatic pressure.

Permacolour Crystal Seal is an economical, easily applied method of providing a permanent waterproof barrier on concrete, cement, plaster and cement brick surfaces. It may be used on both new and existing structures on either the wet or the dry side.


  • Foundations
  • Basements
  • Tunnels
  • Supporting Walls
  • Dams
  • Ponds
  • Pools
  • Silos
  • Sewage Plants
  • Underground Structures

Since the crystal seal system is based on a chemical reaction taking place inside the concrete, some moisture penetration can be expected until voids are sealed by the crystallization process.

5kg, 20kg bags

Data Sheet

Crystal Seal

Some of the Tools Required