Epoxy Grouting & Injection Systems
Epoxy grouts, injection resins and anchoring adhesives for machine foundations, structural crack repair and anchor fixing — genuine Fosroc and Sika stock, specified by a concrete technologist.
Why Engineers Reach for Epoxy.
Epoxy is a thermosetting polymer created by reacting an epoxide resin with a curing agent. Once cured it is rigid, highly durable and bonds tenaciously to concrete, steel and most construction substrates — with exceptional strength plus chemical and water resistance.
That combination is why epoxy dominates four jobs on site: machine foundation grouting (dynamic loads, no shrinkage), structural crack injection (restoring monolithic strength to cracked RCC), anchor grouting (fixing rebar and bolts into hardened concrete) and protective coatings and flooring for floors and walls in industry.
- High adhesion and exceptional compressive strength
- Resists chemicals, water and heat after full cure
- Versatile: grout, injection resin, adhesive, coating
- Long service life with easy maintenance
Not All Epoxies Are the Same Resin.
The base resin decides temperature limits, chemical resistance and flexibility. Here is the family tree.
| Type | Character | Typical use |
|---|---|---|
| Bisphenol A (DGEBA) | General-purpose with good mechanical properties | Adhesives, coatings, insulation |
| Bisphenol F | Enhanced heat and chemical resistance | High-temperature applications |
| Epoxy Novolac | High durability, extreme chemical resistance | Industrial coatings, adhesives |
| Cycloaliphatic | UV resistant, lower viscosity | Coatings, automotive, electronics |
| Flexible epoxy | Impact-resistant, maintains flexibility | Coatings, laminates, adhesives |
Curing happens by homopolymerization (resin reacting with itself) or copolymerization with a hardener — common curing agents include amines, acids, phenols, thiols and alcohols. Practical takeaway: mix ratios and pot life are chemistry, not suggestions. Full cure typically takes 24–72 hours depending on the formulation and temperature.
Specification-Grade Epoxy Systems.
Genuine, batch-coded material from Fosroc and Sika — the names already written into most Indian project specifications.
Fosroc Conbextra EP
Epoxy precision grout from the Conbextra family for machine foundations, base plates and anchor grouting where dynamic loads and chemical exposure rule out cementitious grout.
Sikadur-52
Low-viscosity, solvent-free epoxy injection resin for structural crack repair — injected into cracked RCC members to restore monolithic strength.
Fosroc Lokfix
Anchor grouting system for fixing rebar, bolts and starter bars into hardened concrete — the standard answer for retrofit anchoring.
Sika AnchorFix
Chemical anchoring adhesive for rebar and anchor fixing, backed by Sika’s free anchor-calculation software for engineered fixings.
Respect the Resin.
Epoxy rewards discipline and punishes shortcuts. The essentials our applicators follow — and that we brief every buyer on:
- Wear PPE; avoid skin contact with uncured resin and hardener
- Ventilate enclosed work areas properly
- Mix full kits at the stated ratio — never split by eye
- Dispose of waste responsibly; prefer low-VOC formulations
- Mind temperature: cure behaviour changes with heat and cold
Machine foundation grouting or crack injection beyond your crew’s experience? Our own teams do it as a service — injection grouting, from diagnosis to pressure test.
Epoxy Grouting FAQs.
When should I use epoxy grout instead of cementitious grout?
Choose epoxy for machine bases with dynamic or vibrating loads, chemical-exposure areas, and anchor fixings that must reach high strength fast. Cementitious non-shrink grouts remain fine for static base plates on a budget — we stock both and will tell you honestly which the job needs.
Can epoxy injection repair a structural crack permanently?
Yes — a low-viscosity epoxy like Sikadur-52 penetrates the crack and cures rigid, restoring monolithic strength to the member. The condition: the crack should be dormant and reasonably dry. Live, leaking cracks are first sealed with PU resin.
How long does epoxy take to cure?
Typically 24–72 hours to full cure depending on formulation and temperature, with initial set much earlier. Pot life after mixing is short — plan quantities so each mixed kit is placed before it stiffens.
What is the right product for anchoring bolts and rebar?
Fosroc Lokfix or Sika AnchorFix, matched to hole size, load and substrate condition. For expansion joint cover fixing and facade work, see also our anchor fasteners range.
Is epoxy safe to handle on site?
Yes, with basic discipline: gloves and eye protection, no skin contact with uncured material, ventilation in enclosed areas and proper waste disposal. Cured epoxy is inert; it is the uncured components that demand care.