About Fosroc Conbextra EP10TG

Fosroc Conbextra EP10TG belongs to the Conbextra EP10 family of epoxy grouts, where “EP10” denotes the thin-gap epoxy system and the product is engineered for free-flowing placement into narrow voids. It is a solvent-free epoxy resin grout supplied as a pre-weighed multi-component pack — a resin base and a hardener that are blended on site, with the formulation tuned so the mixed material remains low in viscosity and self-levelling. Unlike the heavily filled cementitious grouts (such as the Conbextra GP / HF range) that suit gaps of 10 mm and upward, EP10TG is built for the opposite end of the spectrum: gap widths from 0.25 mm up to about 10 mm, where a sand-bearing grout would simply bridge and leave voids. The cured material is a dense, low-permeability epoxy matrix that bonds tenaciously to clean concrete and steel. Because it is resin-based rather than hydraulic, it neither bleeds nor settles, gains strength independently of moisture, and reaches usable strength within 24 hours — a decisive advantage when a machine has to be re-commissioned quickly. For Indian contractors, consultants and plant engineers, this makes it the grout of choice wherever precision alignment, thin tolerances and fast turnaround coincide: think turbine soleplates, reciprocating compressors, press beds, rail fixing and the bedding of pre-aligned baseplates on shimmed foundations. Space Arc Engineering, as an authorised Fosroc distributor and applicator across Delhi NCR and Pan-India, supplies EP10TG together with the substrate-preparation and placement guidance needed to achieve the full bearing area the design relies on.

The technical insight

The defining property of EP10TG is the combination of very low mixed viscosity with high mechanical performance. Viscosity is strongly temperature-dependent — roughly 250–450 cps at 10°C, falling to 50–100 cps at 30°C — which is why placement temperature matters as much as the grout itself: in a cold North-Indian winter morning the material thickens and may not reach the far edge of a wide baseplate, whereas in peak summer it flows freely but the pot life shortens. Reported pot life is on the order of 90 minutes at 20°C, dropping to around 40 minutes at 35°C, so on a hot Indian site the working window is genuinely tight and the gap should be primed and dammed before mixing begins. Compressive strength develops fast — approximately 57 MPa at 1 day, 66 MPa at 3 days and 83 MPa at 7 days at 20°C — with the epoxy matrix also delivering flexural strength in the region of 30 MPa and tensile strength around 15 MPa, far higher in tension and flexure than any cementitious grout. The cured density is relatively low (around 1,060 kg/m³ for the resin system) because the thin-gap formulation carries little or no coarse aggregate. The two practical consequences engineers must respect: never place the resin against a wet or contaminated substrate (it will not bond), and never exceed the stated maximum gap in a single pour, because exothermic heat build-up in a thick section of neat epoxy can cause cracking and loss of strength.

Where it is used

• Grouting thin gaps (0.25–10 mm) beneath precision-aligned machine baseplates and soleplates
• Bedding of turbine, compressor and pump baseplates subject to vibration and repetitive dynamic loads
• Fixing and bedding of crane rails and craneway base channels
• Anchoring of holding-down bolts and starter bars in pre-drilled pockets where a free-flowing resin is required
• Grouting under press beds, rolling-mill housings and heavy reciprocating equipment
• Filling annular gaps and re-grouting where a previous cementitious bed has failed under dynamic load
• Repair and bedding in plant areas exposed to occasional oil, fuel or chemical spillage

Key advantages

• Flows into very thin gaps (down to 0.25 mm) that cementitious grouts cannot fill
• High early strength — usable load capacity within about 24 hours for fast machine commissioning
• Non-shrink, with no bleed or settlement, ensuring full effective bearing area under the baseplate
• High compressive, flexural and tensile strength for resistance to repetitive dynamic and impact loads
• Solvent-free formulation — low odour and no solvent flash-off in enclosed plant areas
• Pre-batched whole-pack mixing eliminates on-site weighing errors and ratio mistakes
• Good resistance to oils, fuels and occasional chemical spillage typical of industrial floors
• Cures independently of ambient moisture, unlike hydraulic cementitious grouts

Limitations & considerations

• Restricted to thin gaps — not suitable as a deep or large-pour grout above the stated maximum thickness in a single lift due to exotherm risk
• Pot life shortens sharply in heat (≈40 min at 35°C), demanding fast, well-rehearsed placement on Indian summer sites
• Viscosity rises in cold conditions, which can prevent full flow across wide baseplates if material or substrate is below recommended temperature
• Requires a scrupulously clean, dry, oil-free substrate; bond fails on damp or contaminated surfaces
• Higher unit cost than cementitious grouts, so reserved for thin-tolerance precision and dynamic-load duties rather than bulk gaps
• No coarse aggregate, so it is not an economical choice for large-volume or wide-gap base grouting (use a cementitious Conbextra grade instead)
• Not intended for continuous immersion in aggressive chemicals — designed for occasional spillage exposure

Selection & best practice

Specifications

Industry use cases

How we position Fosroc Conbextra EP10TG

Within the Fosroc Conbextra range, EP10TG sits at the thin-gap, high-precision end. It is closely related to Conbextra EP10 and the higher-flow Conbextra EP10(M) (already on our site), which share the same epoxy chemistry; the choice between them comes down to gap width, flow distance and pot-life needs. Where gaps are wider (10 mm and up) or volumes are large, a cementitious grout such as Conbextra GP or a high-flow Conbextra HF grade is more economical and avoids exotherm issues, while bolt-pocket anchoring is often better served by a dedicated anchor grout like Lokfix. Against competitor systems, EP10TG is comparable in role to Sika’s epoxy precision grouts (e.g. the SikaGrout epoxy / Sikadur bedding range), MBS Sealants’ epoxy grout offerings, and STP and Dr. Fixit products in the Indian market — though Dr. Fixit and several STP lines lean more toward cementitious and waterproofing grouts than thin-gap structural epoxies. The honest positioning is this: EP10TG is not a general-purpose or bulk grout and is priced accordingly; its value is specifically in thin tolerances, fast strength gain and dynamic-load durability. For consultants and procurement teams in India, specifying it is justified where precision alignment and rapid commissioning matter, and Space Arc can advise objectively on when a cementitious alternative would serve the application better at lower cost.

Related Grouts & Anchors products

View all Grouts & Anchors products →