Krystol Internal Membrane (KIM): The Ultimate Integral Concrete Waterproofing Solution
Introduction
Concrete is one of the strongest building materials, but did you know it absorbs water like a sponge?
Over time, this water can cause cracks, leaks, and structural damage. That’s where Krystol Internal Membrane (KIM) comes in—a special waterproofing solution that makes concrete waterproof from the inside out. KIM revolutionizes concrete waterproofing by integrating protection directly into the concrete mix.
Unlike traditional waterproofing methods like nylon Damp Proof Membranes (DPM), which only act as a temporary moisture barrier, KIM integrates directly into the concrete and forms insoluble crystals that block water pathways and self-seal small cracks over time. This means that while nylon membranes can tear, degrade, or be punctured, KIM provides lifetime waterproofing without the need for external layers or ongoing maintenance. By making the entire concrete structure inherently resistant to water, KIM ensures stronger, more durable, and leak-free buildings
Whether you’re building a home, basement, pool, foundation, bridge, or water tank, KIM helps keep water out and makes concrete last longer with less maintenance.
What is KIM?
Krystol Internal Membrane (KIM) is a hydrophilic crystalline admixture that is used to create permanently waterproof concrete.
KIM lowers the permeability of concrete and is used in place of externally applied
waterproofing membranes. By stopping the transmission of water through concrete, KIM
adds durability and longevity to concrete by protecting it against chemical attack and
corrosion of reinforcing steel.
Unlike surface-applied waterproofing products, KIM becomes a permanent part of the concrete, eliminating the risk of membrane failure.
How Does KIM Work?
KIM contains Krystol® technology, which consists of specialized chemicals that react with water and unhydrated cement particles to form insoluble needle-like crystals. These crystals grow within the concrete’s capillaries and micro-cracks, blocking water penetration permanently.
Even if cracks form later due to minor structural movements, KIM’s self-sealing properties allow it to reactivate and seal the cracks when exposed to moisture.
Advantages of Using KIM
1. Permanent Waterproofing
Unlike membranes that can wear out, KIM provides lifetime protection by integrating into the concrete.
2. Self-Sealing Ability
KIM reactivates when exposed to moisture, sealing cracks up to 0.5mm wide, reducing maintenance costs.
3. Reduces Construction Costs
No need for external membranes, saving on labor, material, and installation time.
4. Increases Durability
Prevents corrosion of reinforcement, freeze-thaw damage, and chemical attack, significantly extending the structure’s lifespan.
5. Improves Sustainability
KIM is a green building product, reducing environmental impact by eliminating the need for petroleum-based waterproofing membranes, NSF 61-certified for potable water applications
Applications of KIM
KIM is ideal for waterproofing and durability enhancement in:
Foundation Slabs & Basement – Prevents water ingress from groundwater pressure.
Tunnels & Underground Structures – Ensures long-term moisture protection.
Marine & Coastal Structures – Resists saltwater and chemical exposure.
High-Rise Buildings – Waterproof Below-Grade structures, pile caps and ground foundation slabs.
Water Containment & Treatment Plants – Ideal for reservoirs, dams, and pools.
Comparison: KIM vs. Traditional Waterproofing Methods
Feature | KIM (Integral Waterproofing) | External Membranes |
Durability | Permanent, self-sealing | Prone to wear and tear |
Crack Sealing | Self-sealing up to 0.5mm | Requires repairs |
Installation Cost | Lower (no membranes needed) | High (labor & materials) |
Maintenance | Minimal to none | Frequent replacements |
Environmental Impact | Eco-friendly, NSF 61-certified for portable water applications
| Uses petroleum-based materials |
Conclusion
Krystol Internal Membrane (KIM) is a game-changer in waterproofing technology. By transforming concrete into a self-sealing waterproof barrier, it eliminates the need for traditional membranes, reducing costs, increasing durability, and ensuring long-term protection.
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