POLYURETHANE ADHESIVE PUTTY FOR CRACKED CONCRETE
Overview
Polyurethane adhesive putty for cracked concrete is a high-strength, solvent-free, two-component repair material designed to fill, bond, and reinforce cracks on concrete floors, walls, and industrial structures. It provides excellent adhesion, chemical resistance, and long-term durability, making it suitable for both structural and non-structural repairs.
What Is Polyurethane Adhesive Putty for Cracked Concrete
A reactive polyurethane-based repair compound that cures to a tough, semi-rigid mass used for sealing and rebuilding cracked concrete.
Description
This putty is formulated with polyurethane prepolymers, fillers, plasticizers, and reactive hardeners. When mixed, it forms a dense, paste-like material that adheres strongly to concrete substrates.
Key Features
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Solvent-free, low-odor
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Excellent penetration into micro-cracks
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Flexible yet strong after curing
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Resistant to water, chemicals, vibration, and abrasion
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Suitable for vertical and horizontal applications
Meaning
“Polyurethane adhesive putty” refers to a polymer-rich, thixotropic repair mixture engineered to restore the mechanical strength of damaged concrete areas.
Preparation / How to Make
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Component A (polyurethane resin + fillers) is prepared by dispersing mineral fillers into the resin.
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Component B (hardener) is added right before application.
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The two components are mixed until a uniform paste is obtained.
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Apply immediately into cracks before curing begins.
(This is a simplified industrial overview, not a full formulation.)
Manufacturing Process
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Blend polyurethane prepolymer
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Add mineral fillers, thickeners, and plasticizers
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Deaerate mixture
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Fill into moisture-proof containers
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Pack hardener separately
Formula / Formulations
Formulations typically contain:
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Polyurethane prepolymer
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Reactive hardener
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Calcium carbonate or silica fillers
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Thixotropic agents
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Plasticizers
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Additives for adhesion and moisture resistance
Properties
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High adhesive strength
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Good flexibility
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Chemical and water resistance
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Fast curing
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Excellent gap-filling ability
Applications
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Repairing structural cracks in concrete
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Filling gaps in industrial floors
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Anchoring bolts and metal parts
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Leveling damaged edges and surfaces
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Sealing cracks prior to coating or painting
Usage
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Clean crack
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Mix Component A + B
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Press putty into crack
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Smooth surface
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Allow to cure
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Optional: sand or coat after full curing
Types
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Two-component solvent-free polyurethane putty
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Fast-curing polyurethane putty
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High-flexibility modified polyurethane putty
Advantages
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Stronger adhesion than cementitious fillers
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Better elasticity and crack-bridging
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Long-term durability
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Works on damp concrete
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Easy to apply manually
Summary
Polyurethane adhesive putty for cracked concrete is a high-performance, solvent-free repair solution used to bond, fill, and restore concrete surfaces. Its strong adhesion, flexibility, and chemical resistance make it ideal for industrial and construction repairs where long-lasting results are required.
