Waterstop System

The Krystol Concrete Waterproofing System is an "in-depth" concrete treatment that is applied to the surface of existing concrete structures. Krystol T1 and Krystol T2 are the first and second coats of this two-coat system. Supplied as a dry powder, Krystol is mixed with water to a slurry and applied to the inner or outer side of the concrete structure with a brush, broom or spray equipment. In the presence of water, the special chemicals in Krystol will react with the concrete and will grow millions of long, needle-shaped crystals deep into the concrete mass. These crystals will permanently block and prevent the passage of water through capillary pores, micro-cracks and joints. The concrete itself becomes the waterproof layer and the surface treatment is not required to remain intact for the system to be effective. As a result, the Krystol system is extremely durable and will last the lifetime of the concrete.


  • Stops water movement through concrete
  • Provides a permanent treatment
  • Protects reinforcing steel against corrosion
  • Waterproofs minor cracking
  • Waterproofing increases with time
  • Reaches well below the surface and is not affected by surface wear or abrasion
  • Treated concrete withstands significant hydrostatic pressure
  • Treatment may be applied to positive or negative (inside) surface of concrete
  • Treatment may be applied to old or new concrete
  • Approved for use in drinking water containment
  • Self-seals hairline cracks up to 0.5mm (0.02 in)


  • Concrete foundations and walls
  • Concrete slabs on grade
  • Elevated slabs and ramps
  • Elevator pits and equipment pits
  • Parking structures
  • Swimming pools and water features
  • Water towers, reservoirs and storage tanks
  • Tunnels, pipes and underground vaults
  • Water treatment reservoirs
  • Bridge decks
  • Marine structures

Comparison with traditional systems:

CharacteristicsTraditional SystemsGeoplast Reusable Formwork
Hindrance-Modular system
ResistanceLimitedUp to 60 kN/m2
Concrete adherenceRequires dismantling agentsBeing made of plastics, GEOTUB PANEL does not stick to concrete
Protection10%The best protection for the columns until the end of the operations
PlumbingRequires long operations and it is often inaccurateQuick and accurate thanks to the external structure that allows easy shoring and plumbing
Dismantling agentsRequiredNot required. Everitt Site Supplies recommend 'Kleen Kote' protection and release formula to maintain your forms in top condition.