Krystol Plug™

Product Code:K-620

Description_Krystol Plug

As part of the Krystol Leak Repair System, Krystol Plug is a rapid-setting hydraulic cement product that when mixed with water is used to stop flowing water and repair leaking cracks, holes and joints in concrete.

Krystol Plug sets hard within 2 minutes and has high-compressive strength, which allows it to stop water even under high-hydrostatic pressure. Stopping water flow then allows permanent repair of the leak using Krystol technology.

Krystol Plug is mixed with water and immediately, and firmly, pressed into a prepared chase to stop flowing water. After stopping the water, Krystol Repair Grout is used to introduce Krystol technology to the leak repair. 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


Physical Properties
Bulk density g/cm³ (lb. /cu. ft.)
pH (when mixed with water)
Dark gray powder
1.4 (88)
Plastic Properties
Working time (20°C/ 68°F, 50% RH)
Hardening time (20°C/ 68°F, 50% RH)
1 minute
2 minute
Hardened Properties
Compressive strength 50 MPa (7250 psi) @ 7 days


For use as part of the Krystol Leak Repair System, read and distribute Application Instruction 5.12 — Waterproofing Cracks, Holes and Joints before using this product.

Mix Krystol Plug to a suitable putty consistency that can be held in your hand (wear gloves) -approximately 4 parts powder to 1 part clean water by volume. Mix only the amount of material that can be applied within one minute. After the Krystol Plug putty has been adequately kneaded into a uniform texture, immediately press it firmly into the cracks and crevices to be sealed using maximum pressure but with minimum back and forth motion or rubbing. Air and surface temperatures must be at least 4 °C (40 °F).

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


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


Read the Material Safety Data Sheet (MSDS) 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 Plug is available in 5 kg (11 lb.) and 25 kg (55 lb.) resealable pails

Shelf Life

When stored in a dry enclosed area, Krystol Plug has a shelf life of at least 2 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 OR CONSEQUENTIAL 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.