Dr. Fixit Pidigrout EG-3 S
A three-part epoxy resin grout for machine foundations — mixes on site, sets in under two hours, and holds up under vibration and chemical exposure that cementitious grout can’t take.
What is it?
A three-component epoxy resin machine-foundation grout — resin, hardener and graded aggregate filler mixed on site into a pourable paste.
Where is it used?
Under compressors, pumps, turbines, precast bridge bearings and rail baseplates — any base plate with a 10-65 mm gap carrying dynamic load.
Why use it?
Cementitious grout takes days to reach strength and degrades under oil or chemical spillage near machinery; EG-3 S is walkable within hours and largely inert to plant fluids.
How is it applied?
Mixed with a slow-speed drill and paddle stirrer, then poured continuously from one end through a hopper into a boxed, oil-free gap within its ~30-40 minute pot life.
About Dr. Fixit Pidigrout EG-3 S
Dr. Fixit Pidigrout EG-3 S is Pidilite’s three-component epoxy resin grout for machinery foundations, sold under the Grouts & Anchors line of the Dr. Fixit range. Unlike the familiar cementitious non-shrink grouts (Pidigrout 10M is the in-house comparison), EG-3 S runs on epoxy chemistry — resin and hardener that cure through a chemical reaction rather than cement hydration, bulked with a graded aggregate filler mixed at site. That gives it two traits: strength in hours rather than days, and resistance to acids, alkalis, oils and solvents that eventually attack cement grout. The “S” matters — it’s dosed for 10-65 mm gaps; wider gaps call for sibling Pidigrout EG-3 L.
On Space Arc’s projects across Delhi NCR, this is the grout for jobs where a mechanical contractor specifies epoxy for a compressor, pump, turbine or DG-set foundation — where a few millimetres of movement under a running machine means vibration and unplanned shutdown. It isn’t our default for routine baseplate grouting; cementitious grout does that cheaper. EG-3 S earns its price where dynamic load or chemical exposure justify it.
The technical insight
EG-3 S cures by cross-linking liquid epoxy resin with its hardener — an exothermic reaction largely independent of ambient moisture, reaching a usable 90 N/mm² compressive strength (BS 6319-1983 Part 2, 7-day) far faster than a cementitious grout relying on cement hydration. The same matrix gives Shore D hardness of 80-85 (ASTM D2240) and flexural strength of 20-25 N/mm² (BS 6319-1983 Part 3) — behind its low creep, so a grouted machine holds alignment under vibration better than a cementitious system over years. The trade-off: pot life is only 30-40 minutes at 30°C, shorter in Delhi’s summer heat.
Where it is used
- Base plate grouting under large air and gas compressors
- Foundation grouting for industrial pumps and motors
- Turbine, generator and DG-set baseplate grouting
- Crane and gantry rail grouting, and keyway filling
- Anchoring embedded base plates and holding-down bolts
- Re-grouting machinery that has worked loose from vibration
Key advantages
- Sets in 1-2 hours, formwork strippable around 6 hours — cuts machine downtime versus cementitious grout
- High 7-day compressive strength (90 N/mm²), well ahead of typical non-shrink cementitious grouts
- Good resistance to mineral acids, alkalis, organic acids and solvents
- Excellent bond to both concrete and steel — matters under a vibrating baseplate
- Low creep under sustained load, keeping machine alignment stable for years
- Pourable across 10-65 mm gaps with no ramming or vibration compaction needed
Limitations & considerations
- Pot life is only 30-40 minutes at 30°C — shrinks further in Delhi’s summer heat, so batches must be sized tight
- Needs a trained applicator with a drill and paddle stirrer, not a general masonry crew
- Costs well above cementitious non-shrink grout, so only justified where the job genuinely needs epoxy
- Surface prep is unforgiving — residual oil, laitance or dampness causes debonding, with no fixing it after
- Sold only as a 7.5 kg kit, so a large pour means batching several kits in sequence
Selection & best practice
Treat pot life as the schedule, not a buffer — size batches to what a crew can place inside 30-40 minutes, smaller in summer heat. Get surface prep right first: concrete sound, dry, laitance-free and scabbled; steel abraded to bright metal; formwork sealed in polythene. Mix base and hardener to a uniform colour, then add filler gradually until free-flowing — rushing traps air and weakens the grout. Pour continuously from one end, leave air-relief points open, and if depth exceeds 80 mm, place it in layers about 6 hours apart.
Specifications
| Chemistry | Three-component epoxy resin, hardener & graded aggregate filler |
| Standards compliance | ASTM D 2240; BS 6319:1983 (Parts 2, 3, 7); BS 1881: Part 207 |
| Gap-fill range | 10-65 mm (EG-3 S); 65-120 mm covered by sibling EG-3 L |
| Pot life @ 30°C | 30-40 minutes |
| Setting time @ 30°C | 1-2 hours |
| Compressive strength, 7 days | 90 N/mm² (BS 6319-1983 Part 2) |
| Flexural strength, 7 days | 20-25 N/mm² (BS 6319-1983 Part 3) |
| Hardness, Shore D, 7 days | 80-85 (ASTM D2240) |
| Density / Pack size / Shelf life | 2000 ± 50 kg/m³; 7.5 kg three-component kit; 18 months unopened |
Industry use cases
Industrial & process plants
Grouting compressor and pump baseplates across the industrial belts around Faridabad, Bhiwadi and Manesar, where downtime means lost production.
Power & utility
DG-set and turbine/generator pad grouting for captive power installations, where vibration control over years is the point of epoxy.
Infrastructure & bridges
Precast bridge bearing plate grouting and holding-down bolt anchoring on flyover projects around Delhi NCR.
Warehousing & logistics
Crane rail and gantry keyway grouting in mechanised warehouses, where alignment has to hold for years.
Maintenance & re-grouting
Re-levelling machinery that has worked loose from years of vibration, where fast strength gain shortens the outage.
Frequently asked questions
What’s the difference between Pidigrout EG-3 S and EG-3 L?
Do I really need epoxy grout, or will Pidigrout 10M do the job?
How much working time do I get once it’s mixed?
Does the surface need special preparation?
What temperature does it need for a proper cure?
Can this be used inside a water tank or for potable water contact?
How we position Dr. Fixit Pidigrout EG-3 S
Inside Dr. Fixit’s Grouts & Anchors line, EG-3 S sits next to the cementitious Pidigrout 10M (also sold as Unigrout 505) for everyday non-shrink grouting up to about 75 mm, and its sibling Pidigrout EG-3 L, which carries the same chemistry into wider 65-120 mm gaps. The choice comes down to gap width and dynamic load, not brand preference. Where a specification allows an alternate brand, Fosroc’s Conbextra EP10 is a genuine equivalent in machine-foundation grouting, worth quoting alongside EG-3 S. As an authorised Dr. Fixit distributor and applicator, Space Arc can supply and apply either family depending on what the contractor specifies.
Fosroc Conbextra EP10 — Specifiers who prefer a two-component epoxy grout system over Pidigrout’s three-part site mix, or who are already standardised on Fosroc across a project, often choose Conbextra EP10 for the same machine-foundation grouting duty.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.