Repair Systems — Concrete & Structural Defects
Epoxy laminating resins
Technical product reference for structural epoxy adhesives and impregnating resins used to bond CFRP strips and fabrics to concrete in externally bonded reinforcement (EBR) systems — Sikadur-30 for pultruded strips; Adesilex PG1 and Nitowrap EP for wet lay-up fabric systems.
Epoxy laminating and bonding resins for CFRP structural strengthening
Epoxy laminating and bonding resins are the adhesive medium in externally bonded (EB) CFRP strengthening systems. They bond pultruded CFRP strips to concrete using a paste adhesive (Sikadur-30), or saturate woven CFRP fabric in a wet lay-up technique using a low-viscosity liquid resin (Adesilex PG1, Nitowrap EP). The mechanical properties of the cured resin are critical to load transfer efficiency — an inadequate resin or incorrect application will result in premature debonding.
Product Reference
Individual products — one card each — scroll to view all
Sika Australia
Sika Sikadur-30
2-part thixotropic epoxy adhesive for bonding CFRP plates
Sika Sikadur-30 is a two-part, thixotropic epoxy adhesive for bonding Sika CarboDur CFRP plates to concrete, steel, masonry and timber as externally-bonded reinforcement. Non-sag for vertical/overhead work, high strength, cures without shrinkage and is unaffected by high humidity; application +8 to +35 °C (Sikadur-30 LP for elevated temperatures). CONFIRM pack size against the current Sika Australia TDS.
Mapei Australia
Mapei Adesilex PG1
2-part thixotropic epoxy structural-bonding adhesive
Mapei Adesilex PG1 is a two-part, thixotropic epoxy structural-bonding adhesive (epoxy resins + fine aggregate) for bonding CFRP and steel plates to concrete, bonding rigid precast elements, and sealing large cracks. Non-sag for vertical/overhead work. CONFIRM Australian availability, application temperature window and pack size against the current Mapei Australia TDS.
System Comparison
Epoxy laminating resins — confirm all selections against the current manufacturer TDS before specifying.
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Do not confuse epoxy laminating resins with:
- Epoxy anchoring adhesives (Hilti HIT-RE 500 V3, Sika AnchorFix-3+) — anchoring adhesives are injected into drilled holes for rebar dowelling; laminating resins are applied to the concrete surface for CFRP bonding — they are different products with different viscosities, mix ratios, and performance requirements
- Rebar primers (SikaTop Armatec 110 EpoCem, Fosroc Nitoprime Zincrich) — rebar primers are applied to cleaned reinforcing steel for corrosion protection before repair mortar; they are not laminating resins and must not be used for CFRP bonding
- General construction epoxies (Sikadur-32, Sikadur-31, Concresive) — general structural epoxy adhesives are used for concrete-to-concrete bonding, crack injection, and construction joints; they are not tested or approved for CFRP laminating applications and must not be substituted
- Bonding agents (SBR latex, acrylic bonding agents) — SBR and acrylic bonding agents improve adhesion between old and new concrete layers; they are not structural epoxy adhesives and are incompatible with CFRP bonding requirements
- Polyurethane or polyester resins — general polyurethane and polyester resins used in other industries are not suitable for structural CFRP EBR bonding — use only the tested epoxy product specified by the CFRP system supplier
Disclaimer
This page provides general technical information only. Final product selection must be confirmed against the current manufacturer TDS, CFRP system specification, and structural engineer's requirements. Do not substitute laminating resins between CFRP systems without engineer approval. Do not rely on this reference as a substitute for professional engineering advice.