Repair Systems — 03 — Facade & External Envelope
Epoxy resin anchor cavity wall tie
Supplier reference for two-part epoxy resin anchor remedial cavity wall ties for masonry facade remediation on Class 2 strata buildings. Highest bond strength of all resin types — specified for dry masonry and the most demanding load cases. Compares Hilti HIT-RE 500, Fischer FIS EM, Sika AnchorFix-3+, and Helifix epoxy system by resin type, load data, and distribution.
What are epoxy resin anchor cavity wall tie systems?
Two-part epoxy adhesive anchor systems achieve the highest bond strengths of all resin anchor types — zero shrinkage on curing and maximum characteristic resistance values for engineer specification. Epoxy is suitable for dry masonry substrates and is specified for the most demanding load cases.
Product Reference
4 products — 4 brands — epoxy resin anchor cavity wall tie systems — scroll to view all
System Description
Hilti HIT-RE 500 V4 is a two-part epoxy adhesive anchor with very high bond strength for structural anchoring in concrete and masonry, widely specified for remedial cavity wall tie installation in heavy-load applications. ETA-approved with published characteristic resistance values — engineers can directly reference Profis Anchor software for AS 3700 compliant load calculations. Suitable for dry and damp substrates (not saturated); achieves full bond strength in a range of masonry and concrete types. Available nationally through Hilti direct and distributors with full technical support and on-site training.
Technical Properties
- Two-part epoxy resin — Grade 316 stainless steel tie rod — AS 3700 / ETA approved
- Very high load rating — ETA-approved with published characteristic resistance values
- PROFIS Anchor software for engineer AS 3700 compliant load calculations
Limitations
- Epoxy curing is inhibited in wet or saturated holes — use vinylester in persistently damp substrates
- Temperature-dependent cure time — pot life significantly shorter in Australian summer; confirm with TDS
- Hole must be cleaned per Hilti installation method — wire brush, compressed air, blow-out pump
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Description
Fischer FIS EM 390 S is a two-component epoxy mortar anchor system for high-load structural anchoring in solid masonry, hollow masonry, and concrete — suitable for remedial cavity wall tie installation. The thixotropic epoxy mortar provides good resistance to run-out in horizontal and overhead applications, and achieves high characteristic bond strengths in solid masonry substrates. ETA and ICC-ES approvals for a range of anchor configurations — load tables available for engineer calculation. Fischer provides technical software and specification support for anchoring calculations in compliance with AS 3700.
Technical Properties
- Epoxy mortar two-part anchor system — Grade 316 stainless steel — AS 3700 / ETA approved
- Thixotropic epoxy mortar — suitable for horizontal and overhead applications without run-out
- High characteristic bond strengths in solid masonry — ETA published load tables
Limitations
- Epoxy curing inhibited in wet substrates — confirm substrate moisture before specifying
- Hollow masonry requires mesh sleeve — confirm available anchor configuration for masonry type
- Minimum temperatures for curing — confirm with TDS for cold winter conditions
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Description
Sika AnchorFix-3+ is a styrene-free, two-part epoxy anchor adhesive for structural post-installed anchoring in concrete and masonry — suitable for remedial cavity wall tie installation. The styrene-free formulation reduces odour and volatile emissions compared to standard vinylester resins, making it preferable for occupied building work. Suitable for dry and water-saturated substrates (confirmed as a variant in the Sika range) — confirm with current TDS for the specific AnchorFix variant before specifying. Sika provides full technical support and specification assistance through its national network.
Technical Properties
- Styrene-free two-part epoxy anchor adhesive — Grade 316 stainless steel — AS 3700
- Styrene-free formulation — reduced odour and volatile emissions — preferred for occupied buildings
- Suitable for dry and water-saturated substrates — confirm variant suitability with Sika Australia
Limitations
- Confirm the specific AnchorFix variant is approved for the intended masonry substrate — range includes multiple variants
- Temperature-dependent pot life — confirm open time for Australian summer site conditions
- Hole cleaning per Sika installation method is required — contaminated holes reduce published bond strength
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Description
Helifix epoxy resin anchor system uses a Grade 316 stainless tie installed into pre-drilled holes with two-part epoxy resin for very high-load cavity wall tie replacement in demanding applications. Epoxy provides zero shrinkage on curing and very high ultimate bond strength in dry masonry — specified for the most demanding load cases where vinylester is insufficient. Helifix supplies the full system including tie rods, resin, and installation tooling, with technical support for engineer specification. Load data is published for engineer AS 3700 calculations.
Technical Properties
- Two-part epoxy resin — Grade 316 stainless steel tie rod — AS 3700 compliant
- Zero shrinkage on curing — very high ultimate bond strength in dry masonry
- Full system supply including tie rods, resin, and installation tooling
Limitations
- Epoxy curing inhibited in wet or saturated masonry — use vinylester in damp conditions
- Higher cost than vinylester — confirm with engineer whether epoxy load capacity is actually required
- Temperature-dependent pot life — significantly shorter in summer; check TDS before use
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Comparison
Side-by-side comparison of epoxy resin anchor systems. Confirm all selections against current manufacturer TDS before specifying.
| Supplier | Product | Resin Type | Wet OK | Load Rating | Load Data | Key Feature | Primary Use |
|---|---|---|---|---|---|---|---|
| Hilti Australia | HIT-RE 500 V4 | Two-part epoxy | Damp (not saturated) | Very high | ETA + PROFIS | ETA approval + design software | Engineer-specified high-load |
| Fischer Fixings | FIS EM 390 S | Epoxy mortar | Dry preferred | High | ETA published | Thixotropic — overhead OK | Solid and hollow masonry |
| Sika Australia | AnchorFix-3+ | Epoxy (styrene-free) | Yes (variant-dependent) | High | Supplier published | Styrene-free — occupied buildings | Occupied building remediation |
| Helifix Australia | Helifix Epoxy System | Two-part epoxy | Dry preferred | Very high | Helifix published | Full remedial tie system | Very high-load cavity tie |
Do not confuse epoxy resin anchor ties with:
- Vinylester resin anchor ties — vinylester achieves reliable cure in damp masonry where epoxy is inhibited; lower ultimate strength than epoxy but better moisture tolerance — listed on the vinylester resin anchor page
- Proprietary kit systems — complete pre-packaged remedial tie kits integrating tie and resin — listed on the proprietary kit system page
- Helical grout-in ties — cementitious grouted helical ties for standard applications — lower load capacity than epoxy but simpler and cheaper for standard residential work — listed on the cavity ties — helical page
- Polyester resin anchors — polyester has lower strength and chemical resistance than epoxy or vinylester — do not use polyester for remedial cavity wall tie applications
- General construction adhesives — construction adhesives (Liquid Nails, Sikabond) are not structural anchor resins and must not be used for cavity wall tie fixing
Disclaimer
This page provides general technical information only. Epoxy resin anchor type, diameter, embedment, and spacing must be confirmed by a structural engineer against project-specific masonry conditions and AS 3700. Do not use epoxy in wet or saturated masonry without technical confirmation. Hole cleaning is critical — follow manufacturer installation instructions.