Krystol Internal Membrane™ (KIM®)

The Original and Only Crystalline Waterproofing Admixture With More Than 40 Years of Demonstrated Success.

How It Works

Krystol technology reacts with moisture 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.

Unlike other crystalline solutions that react with free lime that eventually depletes over time, KIM chemically reacts with water and unhydrated cement particles. Any moisture introduced over the lifespan of the concrete will initiate crystallization, ensuring permanent waterproofing and watertightness protection.

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Why Krystol?

Proven over 50 years

Krystol Internal Membrane, introduced over 50 years ago as the first crystallization technology, has proven its efficacy through the enduring longevity of the structures where it was used.

Integral Admixture

Unlike surface applied solutions that can degrade over time, Krystol Internal Membrane in integral to the concrete, ensure it continues to work over the lifetime of the structure — no further maintenance required.

Permanent Reactive Technology

Moisture triggers crystallization throughout the concrete's life, ensuring permanent protection and long-term structural durability.

Versatile

Krystol Internal Membrane is compatible with cast-in-place, precast, and shotcrete in any placement, offering design flexibility while reducing shrinkage and restrained shrinkage cracking.

Safe

Kryton’s waterproofing admixture is designed to combat sulfuric acid-producing bacteria (H2S), a common concern in water infrastructure. Kryton’s solutions are not based on pesticides and contain no silver or copper so are safe for contact with potable water and certified by NSF.

Sustainable

By making the concrete itself the waterproof barrier, Krystol technology can reduce the need for additional materials and processes associated with external waterproofing or watertightness methods. This can result in more sustainable concrete over its lifecycle.

Resources

  • Technical Resources
  • Specifications
  • Marketing Materials
  • Videos

Technical Data Sheets

Technical Data Sheet - Krystol Internal Membrane (KIM)

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Application Instructions

Application Instruction 1.11 – Cast-In-Place-Concrete

Application Instruction 1.21 – Instructions for Shotcrete Nozzelmen and Crew

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Application Overviews

Waterproofing Wastewater Treatment Tanks

Waterproofing Elevators and Sump Pits

Waterproofing Bridges

Waterproofing Elevators and Sump Pits

Waterproofing Parking Garages (Cast-in-Place)

Waterproofing Parking Garages Shotcrete

Waterproofing against Secant Pilings

Waterproofing Watertanks and Reservoirs

Waterproofing Swimming Pools

Waterproofing Tunnels

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FAQs

KIM – FAQ

Krystol Technology - FAQ

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CSC Masterformat Specifications

Krystol Internal Membrane KIM CSC Specification - Shotcrete (Section 03 05 15)

Krystol Internal Membrane KIM CSC Specification (Section 03 05 15)

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CAD Drawing Details

Wall To Slab - Triple Protection

Wall To Wall - Double Protection - External Grout Method

Wall To Wall - Triple Protection

Slab To Slab - Double Protection - External Grout Method

Slab To Slab - Double Protection - Internal Swelling Method

Slab To Slab - Triple Protection

Wall To Elevated Slab - Double Protection - External Grout Method

Wall To Elevated Slab - Double Protection - Internal Grout Method

Wall To Elevated Slab - Double Protection - Internal Swelling Method

Wall To Elevated Slab - Triple Protection

Control Joint - Back Filled Wall

Control Joint - Blind Shoring Wall

Tie Back Blockout - Double Protection External Grout Method

Penetration - Tie Holes

Penetration - Internal Swelling Method

Penetration - External Grout Method

Expansion Joint - Heavy Duty Cover Plate Application

Expansion Joint - Joint Application

Expansion Joint - Deck To Wall Application

Expansion Joint - Angle Iron Application

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Brochures

Krystol Internal Membrane™ (KIM®)

KIM is a hydrophilic crystalline admixture used to create permanently waterproof concrete.

Waterproofing Structural Shotcrete Without A Membrane

Structural shotcrete is becoming a preferred concreting method in foundation construction, building tanks, parking garages and many other structures because it’s up to 50% faster than conventional cast in place.

Protect Marine Structures with Crystalline Waterproofing

Use the right products to protect and increase the lifespan of infrastructure in harsh marine environments.

Smart Concrete®

The most effective concrete waterproofing system in the world. Kryton’s Smart Concrete® solutions contain proprietary technologies that allow concrete to respond to its environment to protect itself against water penetration and corrosion, or erosion and abrasion.

Precast Concrete Waterproofing

Krystol Internal Membrane™ (KIM®) is a hydrophilic crystalline admixture used to create permanently waterproof concrete.

Construction and Repair of Concrete Tunnels

Construct watertight tunnels that last. Tunnels can be subjected to heavy traffic and vibration, temperature changes, corrosion damage and freeze thaw cycles which affect the tunnel’s durability.

Construction and Repair of Concrete Water Containment Structure

Construct watertight water containment structures that last. Take the risk out of creating watertight tanks from the begining by using Kryton’s Krystol Internal Membrane™ (KIM®) admixture and Krystol Waterstop Joint System.

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Whitepapers

The Science of Krystol Technology

Krystol crystalline admixture and other technology is based on principles that are very similar to the processes that occur during the hydration and hardening of concrete. ...

Silica Fume and KIM®

When concrete producers want to modify the properties of concrete, supplemental cementing materials (SCM’S) can be used to achieve the intended goal. ...

10 Reasons to Choose KIM® Admixture over Waterproofing Membrane Systems

It’s becoming clear to many leaders involved in the construction industry that waterproofing concrete from the inside out is the best choice. ...

Do Blind-sided Applications have your back to the Wall?

Traditional waterproofing methods encourage the use of positive-side waterproofing during construction. However, this requires access to the outside wall of the concrete structure. ...

Replace Unreliable Waterproofing Membranes

It’s the intelligent, self-sealing water-protection system that transforms concrete into a powerful water-resistant barrier through crystalline admixtures or surface applied treatments. ...

Krystol vs. Silicate-based Technology

Krystol waterproofing products are supplied as a dry powder comprised of Portland cemeber, silica sand and special chemicals. When combined with water, ...

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Make Waterproof Concrete with Krystol Internal Membrane

Simplify your life with Crystalline Concrete Waterproofing

Waterproofing Shotcrete

Concrete Waterproofing with Krystol® technology

Waterproofing Admixture using Krystol® technology

Become a Kryton Distributor

A Trusted Concrete Solution Since 1973

  • 50+ years of proven performance
  • Winner of the Most Innovative Product Award at World of Concrete
  • The longest warranty in the business — and the only supplier to have already outlived its warranty!

Use Cases

Recommended for all precast, cast-in-place, and shotcrete applications subject to water pressure.

  • Tunnels and subways
  • Marine infrastructure
  • Wastewater treatment infrastructure
  • Sewage infrastructure
  • Below grade parking
    or basements
  • Foundation walls and
    footings
  • Slabs
  • Reservoirs and water
    containment tanks
  • Canals
  • Pits
  • Swimming pools
  • Dams

Featured Case Studies

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