POLYESTER CONCRETE ADHESIVE

High-Strength Structural Polyester Adhesive for Concrete Bonding

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What Is Polyester Concrete Adhesive

Polyester concrete adhesive is a two-component, high-strength bonding system formulated with unsaturated polyester resin and mineral fillers. It is designed for anchoring, repairing, filling, and bonding concrete substrates. When cured, it forms a hard, durable polymer concrete layer with excellent mechanical properties.

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Description of Polyester Concrete Adhesive

Polyester concrete adhesive provides exceptional adhesion to cementitious surfaces due to its rapid polymerization mechanism and compatibility with mineral materials. It is widely used in construction, repair, infrastructure reinforcement and structural filling.

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Definition

A polyester concrete adhesive is defined as a resin-based structural adhesive composed of:

• Polyester resin (binder)

• Hardener (usually MEKP)

• Inorganic fillers

• Performance additives

The mixture cures quickly to form a hard, stone-like composite.

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Overview

This adhesive offers:

• Fast curing

• Strong bonding to concrete

• High compressive and tensile strength

• Excellent chemical resistance

• Easy application

• Non-shrinking, dense structure

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Meaning

The term refers to a polyester-resin-based composite adhesive used to bond, fill or structurally repair concrete surfaces.

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Preparation of Polyester Concrete Adhesive (General Principles)

• Keep all materials dry and clean

• Use high-quality unsaturated polyester resin

• Ensure correct MEKP ratio for controlled curing

• Mix fillers gradually to avoid air entrapment

• Maintain uniformity before packaging

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Prepare Polyester Concrete Adhesive (Steps)

1. Prepare the resin in a clean vessel.

2. Add mineral fillers under slow mixing.

3. Incorporate additives (thixotrope, wetting agents).

4. Adjust viscosity with reactive diluents if needed.

5. Package the resin mixture separately from the MEKP hardener.

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Making Polyester Concrete Adhesive

Manufacturing requires a controlled mixing procedure where fillers are dispersed into the resin. Degassing improves final strength and reduces shrinkage.

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Polyester Concrete Adhesive Manufacturing Process (Summary)

The adhesive is produced by blending polyester resin with mineral fillers, adding additives, and adjusting the rheology. It is then packaged as a two-component system (resin + hardener).

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Formula (General Guide)

Component A (Resin Part):

• Unsaturated polyester resin

• Calcium carbonate / silica fillers

• Thixotropic agent

• Wetting & dispersing agents

• Reactive diluent (styrene or low-VOC alternatives)

Component B (Hardener):

• MEKP catalyst

(Exact ratios vary based on curing speed, viscosity, and strength requirements.)

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Formulations 

FMs depend on:

• Required working time

• Viscosity (paste, mortar, fluid)

• Structural strength requirements

• Temperature resistance

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Production Process

1. Weigh all materials accurately.

2. Pre-mix resin and additives.

3. Add fillers under controlled agitation.

4. Homogenize mixture.

5. Remove air via vacuum (optional).

6. Package in sealed moisture-proof containers.

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Properties of Polyester Concrete Adhesive

• High bonding strength

• Excellent mechanical resistance

• Fast curing

• Good adhesion to concrete, stone, masonry

• Resistant to water, chemicals, and freeze–thaw cycles

• Non-shrinking

• High durability under load

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Applications of Polyester Concrete Adhesive

• Concrete repair and patching

• Structural anchoring

• Fixing bolts, dowels, and rebar

• Filling wide cracks and cavities

• Bonding precast concrete elements

• Masonry reinforcement

• Heavy-duty floor repairs

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Usage of Polyester Concrete Adhesive

• Mix resin and hardener in the correct ratio

• Apply to clean, dry, roughened concrete

• Allow curing at ambient temperature

• Avoid moisture during curing

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Cost Factors

• Resin grade

• Type and amount of fillers

• Packaging format

• Strength class

• Additive technology

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Types of Polyester Concrete Adhesive

• High-viscosity paste adhesives

• Flowable polyester mortar

• High-strength anchoring compounds

• Flexible-modified polyester adhesive

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Advantages

• Very strong adhesion

• Fast curing & quick return to service

• Good chemical resistance

• Easy to mix and apply

• Cost-effective compared to epoxy systems

• Excellent compatibility with concrete

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SUMMARY

Polyester concrete adhesive is a high-performance structural bonding compound formulated with polyester resin and mineral fillers. It cures rapidly to produce a stone-like composite with high mechanical strength, excellent adhesion, and strong durability. Ideal for concrete repair, anchoring, bonding, and filling applications, it offers a cost-effective, fast-curing alternative to epoxy adhesives while maintaining strong performance in construction and industrial environments.