Fosroc Lokfix E45T
A styrene-free vinyl-ester injection anchor engineered for hot Indian job sites, holding rebar, studs and bolts firmly in cracked, wet or even flooded concrete.
What is it?
A two-part, styrene-free vinyl-ester resin cartridge that cures into a high-bond chemical anchor for post-installed rebar, threaded studs and bolts.
Where is it used?
Concrete and masonry fixings on sites where ambient and substrate temperatures run high, including cracked, damp and flooded holes.
Why use it?
It keeps a workable open time in the heat, seats fixings closer to slab edges than expansion anchors, and applies no bursting force to the concrete.
How is it applied?
Drill, clean the hole thoroughly, load the 300 ml cartridge into a skeleton gun, inject through the static mixer from the base of the hole, then insert the fixing before gel time expires.
About Fosroc Lokfix E45T
Lokfix E45T is Fosroc’s answer to a problem every North Indian contractor knows well: a chemical anchor that starts to gel before you can seat the bolt because the site is baking at 40-plus degrees. Built on a styrene-free vinyl-ester resin, the E45T grade is formulated with a deliberately extended open time so crews get a sensible working window even when substrate temperatures climb towards 45 C. It arrives as a 300 ml coaxial cartridge that fits any quality skeleton gun, dispensing both components through a static mixer nozzle in the correct ratio, so there is no site batching, no weighing and no guesswork about mix quality.
What makes the product genuinely useful on Indian jobs is its tolerance for less-than-ideal holes. E45T is accredited for dry, damp, wet and even water-filled (flooded) drilled holes, and it carries seismic C1 and C2 accreditation for cracked and un-cracked concrete. That means it holds up in the real conditions of retrofit and repair work: monsoon-soaked slabs, holes that will not stay dry, and older concrete that has already cracked. Because it bonds chemically to the wall of the hole rather than wedging against it, the resin transfers load without exerting the outward bursting force of a mechanical anchor, letting engineers place fixings closer to edges and at tighter spacings.
The technical insight
A chemical anchor works by filling the annular gap between a drilled hole and the inserted steel with a resin that grips both surfaces and transfers load through bond and mechanical keying, not through friction. The reason E45T is graded separately from cooler-climate resins comes down to reaction chemistry. Vinyl-ester cure is exothermic and temperature-driven, so the same formulation that gives a comfortable working time at 20 C will flash off in minutes at 45 C, leaving a crew with a half-inserted stud and a ruined fixing. E45T is catalysed to slow that reaction, stretching the gel window in the heat while still reaching full strength once cured. The styrene-free chemistry also matters on site: it cuts the sharp odour and VOC load associated with older polyester and styrenated resins, which is a real benefit in enclosed plant rooms, basements and occupied buildings. Crucially, because the resin shrinks negligibly and grips the full depth of the hole, it seals the annulus against water ingress, protecting the embedded steel from the corrosion that eventually loosens expansion anchors.
Where it is used
- Post-installed reinforcement (rebar) starter bars for slab and column extensions
- Holding-down bolts and base-plate fixings for steel columns and machinery
- Threaded studs and anchor rods into concrete, stone and solid masonry
- Handrail, balustrade and cladding-bracket anchoring near slab edges
- Structural retrofit and stitching connections in repair and strengthening work
- Fixings in cracked or seismically loaded concrete requiring C1/C2 performance
- Anchoring into damp, wet or water-filled holes on monsoon-affected sites
- Hot-weather anchoring where standard-grade resins gel too quickly
Key advantages
- Extended open time engineered for hot substrates up to around 45 C
- Styrene-free, low-VOC, low-odour resin suited to enclosed and occupied spaces
- Accredited for dry, wet and fully flooded drilled holes
- C1 and C2 seismic accreditation for cracked and un-cracked concrete
- Exerts no expansive force, so fixings can sit closer to edges than expansion anchors
- Injected through a static mixer for consistent, correctly proportioned mixing every shot
- Seals the hole against water ingress, protecting embedded steel from corrosion
- Backed by ETA-level accreditation and Fosroc anchor-design software for load verification
Limitations & considerations
- Hole cleaning is non-negotiable — dust, slurry or debris left in the hole will sharply reduce bond and pull-out capacity
- Optimised for hot conditions; in cool weather the extended set can slow productivity, where a standard grade like Lokfix E55S is more appropriate
- Working (gel) time shrinks as temperature rises, so the fixing must be inserted promptly
- A 300 ml cartridge is finite — large-diameter, deep-embedment anchors consume resin quickly, so estimate consumption per anchor before ordering
- Once mixed in the nozzle the resin cannot be reworked; a fresh nozzle is needed after any pause beyond the gel time
- Not a substitute for a specific engineering design — anchor loads, edge distances and embedment must be verified against the ETA data and project conditions
Selection & best practice
Getting full anchor capacity from E45T is almost entirely about hole preparation. Drill to the specified diameter and embedment, then clean rigorously: blow out the dust with oil-free compressed air, brush the bore with a correctly sized wire brush, and blow again — repeat until the hole runs clean. For deep or overhead holes, use a nozzle extension so resin is injected from the base of the hole upward, allowing air to escape and avoiding voids. Discard the first few pulls of resin until the two components emerge evenly coloured, confirming the mixer is working. Insert the fixing with a slow twisting motion to coat the full embedment, and do not disturb it until the resin has cured. In hot weather, mix only what can be placed within the gel window and keep cartridges shaded before use; in wet or flooded holes, follow the accredited procedure for that condition and confirm the load data being used matches it. Always cross-check anchor spacing, edge distance and embedment against the ETA and Fosroc design software before finalising the fixing.
Specifications
| Product type | Two-component vinyl-ester injection chemical anchor |
| Resin chemistry | Styrene-free vinyl-ester |
| Temperature suitability | Optimised for hot working conditions up to approx. 45 C substrate |
| Substrate conditions | Dry, wet and flooded holes; cracked and un-cracked concrete, masonry |
| Seismic accreditation | C1 and C2 |
| Cartridge size | 300 ml coaxial cartridge with static mixer nozzle |
| Application equipment | Standard skeleton / caulking gun; no separate mixing needed |
| Orientation | Horizontal, vertical and overhead fixings |
| VOC / odour | Low-VOC, low-odour (styrene-free) |
Industry use cases
Infrastructure & Metro
Post-installed rebar starter bars and base-plate anchors on outdoor structures where summer slab temperatures are high and pours are cast in stages.
Industrial & Plant
Machine holding-down bolts and equipment fixings in enclosed plant rooms where the low-odour, styrene-free resin is preferred over pungent alternatives.
Repair & Strengthening
Structural stitching and retrofit connections into aged, cracked concrete needing C1/C2 seismic-rated anchors.
Building & Façade
Handrail, balustrade and cladding-bracket fixings placed close to slab edges where expansion anchors risk spalling the concrete.
Monsoon-affected sites
Anchoring into damp, wet or water-filled holes on projects running through the rains, where a flooded-hole-accredited resin is essential.
Frequently asked questions
Is Lokfix E45T a polyester resin?
What makes E45T different from Lokfix E55S?
Can I use it in a hole full of water?
Will it work in cracked concrete?
How much does one cartridge fix?
Do I really need to clean the hole that thoroughly?
How we position Fosroc Lokfix E45T
Lokfix E45T is the hot-climate member of Fosroc’s chemical-anchor family. For standard ambient temperatures, its sister product Lokfix E55S offers the same styrene-free vinyl-ester bonding at a cooler-optimised set time, and for the highest-load or most demanding structural anchoring, Fosroc’s pure-epoxy Lokfix E-series (such as E75/E77 grades) delivers greater capacity where budget and cure time allow. Where the work shifts from anchoring to grouting a base plate or filling a void, we would point you to Fosroc’s Conbextra epoxy and cementitious grouts instead. Across our other brands, Hilti and Bosch injection systems cover comparable anchoring needs, but for projects already specified around Fosroc — or where you want a single accredited system with design-software backup — E45T is the natural hot-weather choice. Space Arc Engineering supplies and applies the full Fosroc anchoring range across Delhi NCR and pan-India.
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