Krystol Waterstop Treatment™

Product Code: K-321


Krystol Waterstop Treatment is a cementitious crystalline slurry that is applied to horizontal and vertical construction joints to provide additional waterproofing protection, and protect rebar from corrosion.

Krystol Waterstop Treatment is used in conjunction with Krystol Waterstop Grout and/or Krytonite, as part of the Krystol Waterstop System, wherever water penetration through static concrete-to-concrete joints is a concern. Krystol Waterstop Treatment can also be used by itself as a dampproofing treatment.

Krystol Waterstop Treatment contains Krystol technology. When applied to concrete, Krystol chemically reacts with water and un-hydrated cement particles to form insoluble needle-shaped crystals that fill capillary pores and micro-cracks in the concrete and block the pathways for water and waterborne contaminants. Any moisture introduced over the lifespan of the concrete will initiate crystallization, ensuring permanent waterproofing protection.

Features & Benefits

Recommended Uses

Krystol Waterstop Treatment is used in conjunction with Krystol Waterstop Grout and/or Krytonite as part of the Krystol Waterstop System at all static concrete-to-concrete joints where water penetration is a concern. Krystol Waterstop Treatement can also be used by itself as a dampproofing treatment.


Physical Properties
Bulk density
pH (when mixed with water)
Buff / yellow powder
1.2 g/cm3 (75 lb. /cu. ft.)
Plastic Properties
Working time (20°C/ 68°F, 50% RH)
Hardening time (20°C/ 68°F, 50% RH)
35 minutes
2.5 Hours


Refer to Krystol Waterstop Application Instruction 4.11 to 4.22 (as applicable) before using this product. Consult a Kryton Representative for help with selecting the appropriate joint detail.

Mix approximately 3 parts Krystol Waterstop Treatment to 1 part clean water (by volume) to a thick slurry consistency. Apply Treatment at construction joints prior to pouring next subsequent concrete. Protect from rain, rapid drying or freezing for at least 24 hours.

Drawings and Specifications:
For section drawings, CAD details and specification language related to this product, visit or contact your authorized Kryton representative.


Krystol Waterstop Treatment is effective for rigid structures only and may not reliably seal joints that experience variable loading or repeated movement. Consult a Kryton representative for project specific recommendations.


Read the Safety Data Sheet (SDS) for this product. For professional use only. This product becomes caustic when mixed with water or perspiration. Avoid contact with skin or eyes. Avoid breathing dust. Wear long sleeves, safety goggles and impervious gloves.


Krystol Waterstop Treatment is available in 5 kg (11 lb.) and 25 kg (55 lb.) resealable pails

Shelf Life

When stored in a dry enclosed area, Krystol Waterstop Treatment has a shelf life of at least 3 years for unopened pails.


Kryton International Inc. (Kryton) warrants that Kryton products are free from manufacturing defects and comply with the specifications given in their respective technical data sheet. Because conditions of use, such as site conditions, surface preparations, workmanship, concrete ingredients, weather, structural issues and other factors are beyond the control of Kryton, no warranty can be given as to the results of use. Purchaser agrees to seek the advice of qualified professionals and to determine for themselves the suitability of the products for their intended purpose and assumes all risks. Purchaser’s sole remedy is limited to replacement of any product proven defective or at Kryton’s option refund of the purchase price paid. THIS LIMITED WARRANTY CONTAINS THE ENTIRE OBLIGATION OF KRYTON. NO OTHER WARRANTIES, EXPRESS OR IMPLIED, SHALL APPLY INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. KRYTON SHALL NOT BE LIABLE UNDER ANY LEGAL THEORY FOR SPECIAL ORCONSEQUENTIAL DAMAGES. No representative of Kryton has the authority to make any representations or provision except as stated herein. Kryton reserves the right to change the properties of its products without notice.