Repair Systems — Concrete & Structural Defects
Epoxy anchoring adhesives
Technical product reference for epoxy and epoxy-acrylate anchoring adhesives used in structural crack stitching and crack-crossing dowel installation — covers AS 5216 compliance, hole condition suitability, and cartridge systems for Australian structural repair.
Crack stitching — when and how it works
Structural crack stitching installs steel bars at 45 degrees across the crack plane, anchored with chemical adhesive on each side. Under tension, the bars resist crack widening mechanically. Stitching is used where cracks are too wide or too numerous for epoxy injection alone, or where ongoing movement makes rigid epoxy injection inappropriate.
Product Reference
Individual products — one card each — scroll to view all
Hilti
Hilti HIT-RE 500 V3
Pure epoxy injection anchor — dry/damp/water-filled, seismic
Hilti HIT-RE 500 V3 is a pure-epoxy injection anchoring adhesive qualified for dry, damp and water-filled holes, with cracked-concrete (C2) and seismic approvals — for post-installed reinforcement and threaded rod. Design to AS 5216 via Hilti PROFIS. CONFIRM cartridge sizes and gel/cure times for the hole condition against the current Hilti AU documentation.
Sika Australia
Sika AnchorFix-3+
Epoxy-acrylate anchoring adhesive — dry/damp, cracked & uncracked
Sika AnchorFix-3+ is an epoxy-acrylate anchoring adhesive (AS 5216 / ETA) for rebar and threaded rod in dry and damp holes, approved for cracked and uncracked concrete, with a faster cure than a pure epoxy. CONFIRM cartridge sizes and gel/cure times against the current Sika Australia TDS.
Ramset
Ramset Chemset Epoxy 500+
Pure epoxy anchoring adhesive — dry/damp holes
Ramset Chemset Epoxy 500+ is a pure-epoxy anchoring adhesive (AS 5216 / ETA) for N12/N16 rebar and threaded rod in dry and damp holes, approved for cracked concrete. CONFIRM the cracked-concrete C-class, cartridge sizes and gel/cure times against the current Ramset AU documentation.
Mapei Australia
Mapei Mapefix EP 100
Pure epoxy chemical anchor — rebar / threaded rod
Mapei Mapefix EP 100 is a pure-epoxy chemical anchoring adhesive for post-installed rebar and threaded rod. CONFIRM the AS 5216 approval scope (cracked/seismic), hole moisture rating, cartridge size and gel/cure times against the current Mapei Australia TDS.
System Comparison
Epoxy anchoring & crack-stitching adhesives — confirm all selections against the current manufacturer TDS before specifying.
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Do not confuse epoxy anchoring adhesives with:
- Epoxy rigid injection resins — injection resins (Sika Injection-451, Fosroc Concresive 1414) are low-viscosity two-component epoxies pumped under low pressure through surface ports into crack traces; anchoring adhesives are high-viscosity pastes injected into drilled cylindrical holes to bond rebar or threaded rod — completely different viscosity, delivery method, and function
- Epoxy laminating resins — two-component epoxies used to saturate and bond CFRP strips (Sika CarboDur, MBrace) are formulated for wet lay-up and thin-film adhesive bond; anchoring adhesives are high-fill paste systems designed for in-hole resistance under tensile and shear load
- Rebar primers and corrosion inhibitors — cementitious rebar primers (Sika Armatec 110, Ardex BR 10 ZP) are brush-applied coatings to cleaned rebar surfaces to provide galvanic protection before mortar reinstatement; epoxy anchoring adhesives install new bars into drilled holes in sound concrete — different application in the repair sequence
- SBR and acrylic bonding agents — SBR latex (Sika Latex, Ardex B 14) and acrylic primer bonding agents are applied to the concrete substrate to improve mortar bond for patching and overlays; they are not anchoring systems and have no role in chemical anchor installation
- Mechanical expansion anchors — wedge and sleeve anchors (Hilti HSA, Ramset SupaBolt) achieve load capacity by mechanical expansion against the drill hole wall; chemical anchors achieve capacity by adhesive bond in the annular gap — different behaviour, design methods, and failure modes
Disclaimer
This page provides general technical information only. Final product selection must be confirmed against the current manufacturer TDS, project specification, substrate condition, and applicable standards. Do not rely on this reference as a substitute for professional engineering advice.