Repair Systems — Concrete & Structural Defects
Structural anchors & dowels
Technical product reference for helical stainless steel crack stitching bars (Helifix, Thor Helical) for masonry, and epoxy chemical anchor dowels (Hilti HIT-RE 500 V3, Ramset Chemset) for concrete — settlement must be confirmed dormant and structural engineer assessment is required before stitching.
4
Products covered
Helical SS bar
Masonry system
Rebar + epoxy
Concrete system
Confirm dormant
Settlement status
Settlement Cracks — Product Categories
Product Reference
Individual products — one card each — scroll to view all
2 products — 3 visible, scroll for more
Hilti Australia — HIT-RE 500 V3 + N12 Bar
Hilti HIT-RE 500 V3 + N12 Bar — Structural Dowel Stitching in Concrete
Epoxy adhesive + rebar structural dowel system
AS 5216HIT-RE 500 V345° drilling
Best for
- AS 5216 compliant — Hilti HIT-RE 500 V3 epoxy + N12/N16 deformed rebar
- 16–20 mm drill hole — 30–45 degree angle through crack plane
- 3-stage hole cleaning mandatory (blow-brush-blow) before injection
- Structural engineer design required — bar spacing, angle, and embedment per AS 5216
Avoid where
- Do not install in PT (post-tensioned) concrete without a GPR scan confirming tendon positions…
- Settlement must be confirmed dormant before concrete stitch repair — engineer confirmation required
- Full cure required before loading — confirm cure time from Hilti TDS for ambient…
- Stitching alone does not address foundation movement — engineer must determine if underpinning or…
Key application info
- Thickness / layer
- 16–20 mm
- Application temp
- N/A
- Primer / bond coat
- N/A
- Pack size
- N/A
- Application method
- brush
- Vertical / overhead
- N/A
- Substrate
- N/A
- Setting
- N/A
Key warnings
Do not install in PT (post-tensioned)…Settlement must be confirmed dormant before…Full cure required before loading —…Stitching alone does not address foundation…
Ramset Australia — Chemset Reo 502 PLUS
Ramset Chemset Reo 502 PLUS — Chemical Anchor for Concrete Dowels
Pure epoxy anchoring adhesive — structural dowel — AS 5216
AS 5216600 mL cartridgeTrade availability
Best for
- AS 5216 compliant — 600 mL cartridge — cracked and uncracked concrete
- Suitable for dry, wet, and flooded holes in concrete
- Masonry block: mesh sock required to contain resin in hollow core cells
- Dispense waste shot before injection — first material from new nozzle is unmixed
Avoid where
- Hollow masonry block requires mesh sock or sleeve — without containment, resin runs into…
- Structural engineer design required — bar spacing, diameter, embedment, and loading per AS 5216
- Dispense waste shot before injecting — first material from a new static nozzle is…
- Confirm current product name and cartridge size with Ramset Australia before specifying — product…
Key application info
- Thickness / layer
- N/A
- Application temp
- N/A
- Primer / bond coat
- N/A
- Pack size
- N/A
- Application method
- N/A
- Vertical / overhead
- N/A
- Substrate
- N/A
- Setting
- N/A
Key warnings
Hollow masonry block requires mesh sock…Structural engineer design required — bar…Dispense waste shot before injecting —…Confirm current product name and cartridge…
System Comparison
Concrete cracking — confirm all selections against the current manufacturer TDS before specifying.
| Brand | Product | Type | Key specification |
|---|---|---|---|
| Hilti Australia — HIT-RE 500 V3 + N12 Bar | Hilti HIT-RE 500 V3 + N12 Bar — Structural Dowel Stitching in Concrete | Epoxy adhesive + rebar structural dowel system | AS 5216 compliant — Hilti HIT-RE 500 V3 epoxy + N12/N16 deformed rebar |
| Ramset Australia — Chemset Reo 502 PLUS | Ramset Chemset Reo 502 PLUS — Chemical Anchor for Concrete Dowels | Pure epoxy anchoring adhesive — structural dowel — AS 5216 | AS 5216 compliant — 600 mL cartridge — cracked and uncracked concrete |
Do not confuse structural anchors with:
- Mechanical expansion anchors (Ramset Dynabolt, Hilti HSA) — torque-set mechanical anchors are not suitable for structural crack stitching as they do not bond across the crack plane and cannot be installed at the 30–45 degree angle required for effective stitching; they are for anchorage of fixings into sound concrete, not for crack stitching
- Crack injection resins (PU or epoxy) — injection resins fill the crack from within and restore bond across the crack face; they are a separate treatment from mechanical stitching and may be used in combination (injection first, then stitching for the most severe cracks) or as the sole treatment in fine dormant cracks; a bar with epoxy adhesive is not the same as a pure epoxy crack injection
- Galvanised or mild steel fixings — galvanised and black mild steel ties corrode rapidly in masonry environments; the corrosion product (iron oxide) is significantly larger in volume than the original steel, causing expansion cracking in the masonry around the corroded tie; only 304 or 316 stainless steel is acceptable for masonry tie applications
- Underpinning — underpinning (mass concrete, screw piers, mini-piles, ground injection) addresses the foundation movement causing the settlement; crack stitching addresses the crack in the structure above the foundation; both may be required in a complete settlement repair, but they serve different functions and must both be addressed
- Resin injection grouting — pressure grouting of voids beneath footings or within masonry walls is a ground or structural stabilisation technique, distinct from crack injection for water-stop or structural bonding; specify with a geotechnical engineer for sub-footing void filling
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.
Concrete & Structural Defects
Browse all concrete and structural defect subcategories
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Settlement Cracks
Browse all product categories for settlement crack repair
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Epoxy Rigid Injection
Structural epoxy crack reinstatement before or after stitching
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Lime Repointing
Mortar joint reinstatement in masonry after helical bar installation
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