Back to Products
Injection Systems

PU Injection Grouting

Hydro-Active Polyurethane Resins for Live Leak Sealing

Rapidly expanding single & dual component hydrophobic polyurethane injection resins that react violently with ingress water to form a closed-cell elastomeric barrier.

Need mix design or on-site support? See our technical services

High-pressure PU injection grouting into wall crack forming waterproof expanding foam
IS & ASTM VerifiedChennai Manufacturing
What Engineering Problem It Solves

Instantly stops gushing water leaks under high hydrostatic pressure in concrete cracks, expansion joints, basement diaphragm walls, and tunnel segments.

Substrate Suitability: Poured concrete walls, construction joints, brick/stone masonry, and precast segment junctions.
Related Solution Protocol: Active Leak High-Pressure Injection

Key Performance Advantages

Expands up to 30x volume upon contact with water in under 40 seconds
Forms a tough, flexible foam that accommodates ongoing joint vibration
Solvent-free, environmentally safe, resistant to microbiological attack
Excellent adhesion to wet concrete, masonry, and steel surfaces
1Drill 45-degree angle injection holes intersecting the crack at midpoint.
2Fix high-pressure mechanical injection packers and tighten firmly.
3Flush crack with water to verify interconnection and remove debris.
4Inject hydro-active PU resin at 50–200 bar until foaming resin emerges from adjacent ports.

Technical Specifications

StandardASTM D1638 • EN 1504-5
Dosage / RateInjected via high-pressure mechanical packers at 50–250 bar
Packaging5kg & 20kg Metal Cans with separate catalyst bottles.
Expansion Ratio20x – 30x free rise
Reaction Induction Time15 – 30 seconds
Full Curing Time60 – 90 seconds
Tensile Strength> 1.8 N/mm²

Typical Site Applications

  • Active water leaking cracks in basement walls and tunnels
  • Expansion and cold construction joint sealing
  • Dam penstocks, underground metro stations, and retaining diaphragms
  • Void filling and soil stabilization around deep culverts

Need Material for Your Project?

Same-day dispatch available in Chennai & across Tamil Nadu. Direct factory pricing for bulk orders.

Get Instant Pricing

AUTHORIZED DEALER STOCK

Related Formulations from Fosroc

Certified dealer-stock formulations available for same-day dispatch to complement your pu injection grouting requirements.

5 Products Stocked
Fosroc Featured

Brushbond Roofguard Terracota

A weatherproof roof coating in terracotta finish, designed to protect concrete and masonry roof surfaces from water ingress, UV degradation, and thermal cracking while maintaining an aesthetic finish.

Available Pack Sizes / Variants:
20L

Equivalent formulations also available across our stocked brands — enquire for alternatives.

SKU: brushbond-roofguard-terracotaEnquire / Quote
Fosroc

Brushbond Roofguard White

The white-finish variant of Brushbond Roofguard — a reflective waterproof roof coating that helps reduce surface heat absorption in addition to protecting against water ingress, useful for terrace and flat-roof applications in hot climates.

Available Pack Sizes / Variants:
20L

Equivalent formulations also available across our stocked brands — enquire for alternatives.

SKU: brushbond-roofguard-whiteEnquire / Quote
Fosroc Featured

Conplast Crystalline

A crystalline waterproofing admixture that reacts with moisture within concrete to form insoluble crystals blocking capillary water paths, providing permanent, self-sealing waterproofing integral to the concrete mass.

Available Pack Sizes / Variants:
30KG

Equivalent formulations also available across our stocked brands — enquire for alternatives.

SKU: conplast-crystallineEnquire / Quote
Fosroc Featured

Nitocote CM210 White

A cementitious protective coating used to waterproof and protect concrete surfaces such as water tanks, terraces, and exposed structural elements, combining waterproofing performance with a durable finish.

Available Pack Sizes / Variants:
23KG

Equivalent formulations also available across our stocked brands — enquire for alternatives.

SKU: nitocote-cm210-whiteEnquire / Quote
Fosroc

Super Cast SW20

A pre-formed waterstop/joint sealing strip used at construction joints in concrete pours (e.g. basement walls, water-retaining structures) to prevent water migration through the joint.

Available Pack Sizes / Variants:
10m x 20mm x 5m

Equivalent formulations also available across our stocked brands — enquire for alternatives.

SKU: super-cast-sw20Enquire / Quote

TECHNICAL FAQS & FIELD GUIDELINES

Frequently Asked Questions: PU Injection Grouting

In-depth technical answers regarding site compatibility, storage requirements, and application procedures.

Reaction induction starts within 15–30 seconds upon contact with ingress water, expanding up to 30x in volume into a rigid-flexible closed-cell hydrophobic foam that instantly arrests high-pressure flowing leaks at 50–200 bar injection pressure.
Technical Documentation & Compliance

Request Technical Data Sheet (TDS) & Method Statement

Obtain full certified laboratory test reports, mix design guidelines, ASTM/IS compliance certificates, and formal method statements for PU Injection Grouting.

Authorized Distributor / Dealer

Fosroc Authorized Distributor Logo
BASF Construction Chemicals Logo
Master Builders Solutions Logo
Sika Building Trust Logo
Berger Home Shield Scientific Waterproofing Logo
Renacon AAC Blocks Logo
MYK Arment Construction Chemicals Logo
STP Limited Logo
Ardex Endura Logo
Fosroc Authorized Distributor Logo
BASF Construction Chemicals Logo
Master Builders Solutions Logo
Sika Building Trust Logo
Berger Home Shield Scientific Waterproofing Logo
Renacon AAC Blocks Logo
MYK Arment Construction Chemicals Logo
STP Limited Logo
Ardex Endura Logo