Overview
Three component and water based polyurethane adhesive for stone is a high-strength, moisture-resistant bonding system formulated for natural stones, artificial stones, concrete blocks and mineral surfaces. The system typically contains Component A (polyol blend), Component B (isocyanate hardener) and Component C (water-based dispersion & functional additives). When mixed, they form a durable structural adhesive suitable for construction and industrial applications.
Key Features
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Excellent adhesion to marble, granite, composite stone, ceramic and concrete
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Water-based and low-VOC formulation
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High chemical and mechanical resistance
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Suitable for vertical and horizontal bonding
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Good workability and controlled curing time
Ingredients (General Composition)
Component A – Polyol Blend
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Polyester polyol or polyether polyol
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Chain extenders
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Fillers (calcium carbonate, silica)
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Plasticizers (optional)
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Defoamers
Component B – Isocyanate Hardener
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MDI-based prepolymer or polymeric MDI
Component C – Waterborne Additives
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Water-based polyurethane dispersion
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Thickener / rheology modifier
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Wetting agents
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Preservatives
Making Procedure
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Prepare Component A
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Charge polyols into the mixing vessel.
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Add fillers slowly under agitation.
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Introduce plasticizers, dispersants and defoamers.
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Mix until a smooth, homogeneous phase is obtained.
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Prepare Component C
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In a separate vessel, add water-based polyurethane dispersion.
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Add thickener, wetting agent and preservatives.
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Adjust viscosity according to the required application method.
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Combine Components A and C
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Slowly add Component C into Component A under medium–high shear.
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Continue mixing until uniform.
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Introduce Component B During Application
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Add Component B (isocyanate hardener) just before use.
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Mix thoroughly to initiate chemical crosslinking.
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Apply onto clean stone surfaces.
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Curing
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Allow adhesive to cure under ambient humidity.
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Full cure occurs within several hours depending on formulation.
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Applications
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Bonding natural stone panels
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Installation of stone tiles
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Repair of cracked or fractured stone
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Composite stone manufacturing
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Architectural and construction adhesives
Properties
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High tensile and shear strength
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Strong adhesion even on slightly damp surfaces
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Good chemical resistance
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Low odor and environmentally friendly
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Excellent sealing and gap-filling capability
Summary
Three component and water based polyurethane adhesive for stone is a durable, high-performance, environmentally friendly structural bonding system. Its formulation integrates polyols, waterborne polyurethane dispersion and isocyanate hardener to provide strong adhesion, efficient curing, and excellent resistance on stone-based materials. The making procedure involves preparing polyol and waterborne phases separately, combining them, and adding the isocyanate hardener prior to application to activate crosslinking.
