POLYURETHANE ADHESIVE PUTTY FOR CRACKED CONCRETE
What is Polyurethane Adhesive Putty for Cracked Concrete
Polyurethane adhesive putty for cracked concrete is a two-component, solvent-free repair material designed to fill, bond and reinforce cracks in concrete substrates. It offers strong adhesion, chemical resistance and long-term durability.
Description
This putty is based on a blend of polyols and isocyanates that cure to form a tough, flexible polyurethane matrix. It is suitable for horizontal, vertical and overhead crack repair.
Definition
A solvent-free polyurethane adhesive putty formulated to repair damaged concrete surfaces by providing structural bonding and gap-filling performance.
Overview
Two-component and solvent-free polyurethane putties are commonly used in industrial maintenance, building repair and civil engineering applications due to their fast curing and high bonding capacity.
Meaning
The term polyurethane adhesive putty for cracked concrete refers to a reactive, gap-filling adhesive designed to strengthen cracked areas and restore load-bearing performance.
Preparation
Mix Component A (polyol blend) and Component B (isocyanate hardener) at the specified ratio until a smooth, uniform putty is formed.
How to Prepare / How to Make
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Measure both components according to the formula.
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Mix mechanically or manually until homogeneous.
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Apply directly into cracks using a spatula.
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Allow curing at ambient temperature.
Manufacturing Process
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Blend polyols, fillers, thickeners, and additives → Component A
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Prepare isocyanate hardener → Component B
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Fill and pack the two components separately
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Product is mixed only at application stage
Formula (Example Structure)
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Polyol resin blend
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Modified isocyanate
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Mineral fillers
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Thixotropic agents
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Adhesion promoters
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Accelerators (if required)
Formulations
Multiple PU putty formulations can be created by adjusting filler ratio, viscosity modifiers, and curing speed regulators.
Production Process
Blend additives and fillers into polyol; adjust viscosity; degas; filter; fill into containers. Hardener is packed separately.
Properties
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Solvent-free
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High bonding strength
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Excellent chemical resistance
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Fast curing
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Strong adhesion to concrete, stone, metals
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Non-shrink and thixotropic
Applications
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Repair of cracked concrete floors
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Structural bonding and reinforcement
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Industrial maintenance
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Precast concrete restoration
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Anchor hole filling
Usage
Apply mixed putty directly into clean, dry cracks. Smooth the surface and allow curing for several hours.
Types
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Fast-curing PU putty
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High-viscosity structural PU putty
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Flexible PU crack-repair putty
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Heavy-duty load-bearing PU putty
Advantages
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Excellent adhesion even on difficult concrete
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Solvent-free and low-odor
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High mechanical strength
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Good flexibility and crack bridging
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Easy application
Summary
Polyurethane adhesive putty for cracked concrete is a solvent-free, two-component repair material used for filling and reinforcing concrete cracks. It provides strong adhesion, flexibility and durability. The product is easy to apply, cures quickly and is suitable for demanding industrial and construction repair tasks.
