1. What Is Polyester Concrete Adhesive
Polyester concrete adhesive is a fast-curing, high-strength bonding material produced by combining unsaturated polyester resins with mineral fillers and reactive additives. It is widely used for repairing cracks, anchoring bolts, bonding concrete pieces, stone fixing, and structural maintenance applications.
2. Description & Meaning
This adhesive forms a rigid, durable matrix after curing. Its dual nature—polymer resin + inorganic fillers—provides excellent adhesion to cementitious substrates, chemical resistance, and mechanical strength.
3. Ingredients of Polyester Concrete Adhesive
Typical raw materials include:
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Unsaturated Polyester Resin (ortho or iso type)
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Styrene Monomer (reactive diluent)
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Quartz Powder / Calcium Carbonate (fillers)
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Thixotropic Agents (fumed silica)
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Peroxide Catalyst (MEKP)
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Pigments (optional)
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Promoters (cobalt octoate, DMA)
4. Procedure for Making Polyester Concrete Adhesive
Step 1 — Resin Phase Preparation
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Charge the mixer with polyester resin.
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Add styrene monomer slowly under gentle mixing.
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Introduce promoters to adjust curing speed.
Step 2 — Add Fillers
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Add calcium carbonate or quartz powder gradually.
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Increase mixing speed to ensure homogeneity and eliminate agglomerates.
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Add thixotropic agents to achieve required viscosity.
Step 3 — Adjust Performance
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Add pigments if a colored adhesive is desired.
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Check viscosity and density; adjust filler ratio if necessary.
Step 4 — Packaging
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Fill into metal or plastic containers.
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MEKP catalyst is packed separately and mixed by the end user before application.
5. Production Process
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Resin + styrene mixing
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Add fillers & thickening agents
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Adjust rheology & color
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Quality control (gel time, viscosity, adhesion strength)
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Packaging + separate catalyst
6. Properties of Polyester Concrete Adhesive
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Fast curing at room temperature
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High adhesion to concrete, stone, ceramic, and metal
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Excellent compressive strength
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Chemical and moisture resistance
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Thixotropic (non-sag) consistency
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Suitable for vertical and horizontal use
7. Applications
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Concrete crack repair
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Anchoring bolts, rods, and dowels
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Fixing marble & granite pieces
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Structural bonding and patching
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Industrial and construction maintenance
8. Advantages
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Cost-effective vs epoxy systems
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Easy mixing and application
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Rapid strength development
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Good mechanical load capacity
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Adjustable curing time with catalysts
9. Summary
Polyester concrete adhesive is a mineral-reinforced polyester resin system offering strong bonding, rapid curing, and excellent durability for concrete and stone repair applications. It is simple to manufacture using fillers, resin, styrene, promoters, and peroxide catalysts. Its versatility makes it one of the most widely used structural repair adhesives in construction and industrial fields.
