Krystol Internal Membrane™ (KIM®)
The Original and Only Crystalline Waterproofing Admixture With More Than 40 Years of Demonstrated Success.
How It Works
Krystol® is a crystalline admixture that transforms concrete into a self-sealing, waterproof barrier. It reacts with moisture and unhydrated cement to form insoluble, needle-shaped crystals that fill micro-cracks and pores, blocking water and contaminants.
Unlike traditional systems like membranes, which can degrade over time, Krystol remains permanently active. It reinitiates crystallization whenever moisture enters the concrete, even years later. As part of the concrete matrix, it offers long-term protection against hydrostatic pressure and harsh conditions—perfect for India’s demanding concrete structures.
Dosage
Dose at a minimum of 0.8% by weight of cement. A pre-pour meeting with the general contractor, forming contractor, finisher, concrete supplier,
and materials testing engineer is suggested. Under certain project conditions/mix designs, the dosage may vary and may have to be adjusted
up-to maximum of 8 kg /m3 (13.5 lb/yd3), in consultation with KRYTON representative.
Cement as per IS 456:2000.
Why Krystol?
Proven over 50 years
Integral Admixture
Permanent Reactive Technology
Versatile
Safe
Sustainable
Resources
- Technical Resources
- Marketing Materials
- Videos
Technical Data Sheets
Technical Data Sheet Krystol Internal Membrane (KIM)
Safety Data Sheets
Safety Data Sheet - KIM
Application Instructions
Application Instruction 1.11 – Cast-In-Place-Concrete
Application Instruction 1.21 – Instructions for Shotcrete Nozzelmen and Crew
Application Overviews
Waterproofing Water Tanks and Reservoirs
Waterproofing Tunnels
Waterproofing Swimming Pools
Waterproofing Parking Garages - Cast-in-Place
Waterproofing Bridges
Waterproofing against Secant Pilings
Waterproofing Wastewater Treatment Tanks
Waterproofing Elevators and Sump Pits
FAQs
KIM – FAQ
Krystol Technology - FAQ
Brochures
Krystol Internal Membrane™ (KIM®) Brochure - International
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.
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. Cement is mainly made up of several calcium silicates. When cement particles are mixed with water, a chemical reaction occurs whereby these calcium silicates combine with the water to form new compounds. The new compounds are calcium silicate hydrate (CSH) and calcium hydroxide.
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. These materials are added to the concrete at the time of batching and are typically a replacement for a portion of the Portland cement. Silica Fume is a very common SCM that is frequently used to increase the strength and durability of a concrete structure. Used in the right proportion, it can also reduce the overall cost of the concrete.
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. Commonly called integral systems, these are densifiers, water repellents and reactive/crystalline products that are added to new concrete at the batching plant or on-site and react chemically within the concrete.
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. When access is restricted, blind or negative-side applications are often necessary. Unlike old-fashioned external membranes, which rely on an additional hurdle to shield the concrete from moisture, Krystol® crystalline admixtures actually transform the concrete into a water-resistant barrier.
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® relies on a revolutionary crystalline technology that turns porous concrete into an impermeable barrier. The result is a structure with reduced cracking, self-sealing and waterproofing abilities that provide a powerful defense against water damage and corrosion of reinforcing steel.
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, ...
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.
