NJ PU Grouting India.

Polyurethane NJ PU Grouting India, also known as pressure concrete injection in a broader sense when applied to concrete structures, is an effective method for improving the mechanical and sealing properties of soil, rock, and various constructions, including concrete.

Established in , NJ PU Grouting India offers a wide range of waterproofing solutions specializing in PU Grouting with expertise and guaranteed services. Headquartered in Mumbai, we have committed to excellence and reliability in every project so far all over Maharashtra .

Where can you do NJ PU Grouting India.

Our NJ PU Grouting India. Grouting services provide effective solutions for a variety of structures and common problems:

Basements & Foundations

Addressing water seepage through cracks, leaking foundation walls, and dampness causing mold or structural issues.

Concrete Structures

(Walls, Slabs, Columns, Beams): Repairing cracks, voids, and honeycomb structures, restoring integrity, and preventing water ingress.

Underground Structures

(Tunnels, Metro Lines, Parking Garages): Sealing leaks in tunnel linings, controlling groundwater, waterproofing expansion joints, and reinforcing surrounding structures.

Water Retaining

Structures (Dams, Reservoirs, Tanks): Stopping water leakage through the concrete structure or joints and addressing cracks in these crucial elements.

Roofs, Balconies & Terraces:

Preventing water leaks caused by cracks and wear, especially in areas exposed to weather.

Industrial Floors & Walls

Repairing cracks, filling voids, and preventing moisture ingress in demanding industrial environments.

Soil Stabilization

Strengthening loose or weak soil around foundations and slopes to improve stability and prevent settlement.

Sewage & Water Treatment Plants:

Sealing leaks and cavities in the concrete structures to ensure proper containment and prevent environmental contamination.

Our Expertise

Waterproofing Services

Durable, multi‑system solutions for homes, terraces, basements, tanks, and structures.

1
Terrace Waterproofing

Advanced multi‑coat terrace systems using Triguard Chemical, MYK Right Coat, and other proven materials to resist leakage and weather.

2
Outer Wall Crack Filling & Waterproofing

Repairs external wall cracks with crack paste and PU sealants to prevent seepage during monsoons and extend building life.

3
Toilet & Bathroom Grouting

Injection grouting to seal voids and cracks in wet areas for 100% leakage prevention.

4
NJ PU Grouting India. Grouting

Polyurethane grout injected into cracks and voids in RCC structures to block seepage and improve structural integrity.

5
Cementitious Coating Waterproofing

Dense, durable cement‑based coatings ideal for basements, foundations, and retaining walls.

6
Brickbat Coba Waterproofing

Traditional system using brickbats and waterproof mortar to provide slope and protect terraces from seepage.

7
Swimming Tank Waterproofing

High‑performance cementitious or epoxy solutions to prevent leakage in pools and water tanks.

8
Injection Grouting – Kitchens & Balconies

Uses Dr. Fixit URP or MYK Aqua Arm Multicrete admixtures to seal seepage issues in kitchens and balconies.

9
Injection Grouting for Basements

Specialized grouting that blocks water ingress, strengthens structure, and withstands underground pressure.

10
Waterproof Plastering

Plastering with additives like ACC Leak Block LB 101 to keep walls free from dampness and moisture seepage.

11
Expansion Joint Waterproofing

PU sealants and flexible materials to waterproof expansion joints, allowing movement while preventing seepage.

NJ PU Grouting India.

The fundamental principle involves injecting liquid grouting material, such as PU resin, under pressure into the environment or structure. During this process, the grouting material fills fissures and pores. Subsequently, it hardens, thereby connecting disintegrated parts of the rock mass, grains of loose material, or, in the case of concrete, repairing cracks and sealing joints.

In essence, it's a technique that uses pressurised liquid PU resins to fill voids and cracks, solidifying to strengthen and seal the treated material or structure

NJ PU Grouting India. Chemicals

What Materials Do We Use

MC INJEKT GL 95, MC INJEKT 2300 TOP, MC INJEKT 2700, SIKA Injection 201, DE NEEF HA Cut AF, CYH 500, FOSROC Nitofill UR63

MC-Injekt GL-95 TX

MC-Injekt GL-95 TX is a multi-component, soft elastic sealing, polymer-modified, acrylic-based hydro-structural resin.

Elastic Sealing: Used for sealing joints, cracks, and cavities in masonry and concrete in permanent water contact, HDPE membrane bonding, exterior sealing, and creating barriers against rising moisture.

Reaction & Flexibility: Short controllable reaction time (14–125 seconds), highly flexible, reaction retardable with MC-Injekt Retarder GL.

Water Interaction: Swellable (20–30%), impermeable to water.

Properties: Low viscosity, freeze-thaw resistant, excellent bonding, drinking water safe.

Application: Applied with 2-component pump; tools cleanable with water.

MC-Injekt 2300 top

Two-component, very low-viscous, polyurethane-based elastomer resin for flexible sealing.

Sealing Applications: Flexible sealing of cracks, joints, and voids under various water conditions; also for potable water structures and moisture barriers.

Reactivity: High reactivity, controlled pores, reaction accelerable with MC-KAT 23.

Properties: Excellent injection properties, watertight, expansion in cracks >11–17%, max ~100%.

Application: Mix 100:111 by weight or 1:1 by volume; injectable via 1- or 2-component pumps; pre-injection may be needed in high-pressure water conditions.

MC-Injekt 2700 L IN

Two-component, low-viscosity, polyurethane-based duromer resin for force-transmitting sealing in concrete, masonry, and subsoil.

Sealing and Reinforcing: For cavities, cracks, rock consolidation, diaphragm walls, drinking water structures, and strong water ingress.

Water Reaction: Cures waterproof; limited foaming when in contact with water.

Controllable Reactivity: Adjustable with MC-KAT 27 catalyst; thixotropy increase possible with MC-Additive ST.

Properties: Low viscosity, long pot life, high compressive/tensile strength.

Application: Mix in 2-component pump head (1:1 by volume) or via 1-component pump without additives.

Sika Injection-201 IN

Very low viscous, elastic, solvent-free polyurethane injection resin for permanent watertight sealing.

Permanent Watertight Sealing: For cracks and joints in concrete, brickwork, natural stone; usable with Sika Fuko System.

Water Interaction: Creates closed watertight pore structure with elasticity.

Properties: Permanently elastic, no shrinkage, penetrates cracks >0.2mm, chemically resistant, environmentally friendly.

Application: Mix Part A:Part B at 2:1 by volume; injectable via single or two-component pumps.

DE NEEF HA Cut AF

Non-phthalate, single-component, rigid, hydrophobic polyurethane injection grout for high-pressure water leaks.

Water Reaction: Expands and cures quickly to rigid closed-cell foam; reaction controllable via catalyst.

Performance: Enhanced waterproofing, mechanical properties, and durability.

Versatility: For large voids, tunnels, gravel layers, cracks, honeycombs, pre-injections in tunneling.

Properties: High strength, non-flammable, solvent-free, potable water approved.

Application: 1-component; pre-flush cracks with water for better penetration.

MYK ArmGrout Inject PU1

Single-component, solvent-free polyurethane injection resin for waterproofing and stone compaction.

Reaction with Water: Forms semi-flexible foam with high volume increase; water aids reaction in dry areas.

Adaptable Reaction Time: 30 seconds–12 minutes via catalyst ratio.

Properties: Rapid, visco-plastic foam; resistant to acids/alkalis; compatible with bitumen.

Application: Ready-to-use; applied with single-component high-pressure pump.

CYH 500

Single-component hydrophobic PU grout.

Versatile Sealing: For defective concrete, tunnels, joints, soil stabilization.

Water Reaction & Expansion: Expands up to 27x volume; forms closed-cell rubber-like foam.

Properties: Good adhesion, movement tolerant, inert after curing.

Appearance: Dark brown liquid; cures light yellow foam.

FOSROC Nitofill UR63

Solvent-free, two-part polyurethane resin for sealing cracks.

Crack Sealing: Elastic seal for dry or damp cracks; for wet conditions, use with Nitofill WS60.

Properties: Low viscosity, good adhesion, flexible, withstands high hydrostatic pressure.

Application: Mix base and hardener until clear; inject at ≥0.4 N/mm²; seal surfaces with Nitomortar PE before injection if needed.

Contact

NJ PU Grouting India
Flat No. 1, Bhujbal Niwas, Bhujbal Wasti, Sade Satra Nali Road, beside Amanora Park Town, Malwadi, Hadapsar, India 411028
Mail: njconstructionindia@gmail.com
Contact: +91 7028064790

Types of NJ PU Grouting India. (For our chemistry Lovers-)

Understanding Polyurethane Grouting Resins: A Look at the Chemistry Behind the Fix

Polyurethane (PU) grouting has become a go-to solution for improving the mechanical and sealing properties of soil, rock, and various constructions, expanding from its origins in mining to widespread use in civil engineering and geotechnics. At the heart of this versatile technology lies the chemistry of the grouting resins. Let's delve into the three main types of PU grouting materials based on their chemical composition.

1. Two-Component Organic Resins: The Versatile Duo

This category involves a two-part system that cures into a solid PU resin or foam.

Component A typically consists of a polyol in mixture, which includes polyetherpolyol, catalysts, and various additives.

Component B is made up of isocyanates in mixture, such as methylene diphenyl diisocyanate (MDI), along with its homologues and isomers.

The defining characteristic of these resins is their reaction with moisture present in the environment or the construction they're injected into. What's more, the intensity of mixing does not fundamentally impact the reaction process because a homogeneous solution is formed, leading to consistent curing.

2. One-Component Organic Resins: The Moisture-Activated Solution

Simpler in application, one-component organic resins are designed to react directly with moisture present in the environment or the structure itself to form an organic resin. These materials are primarily based on prepolymer MDI.

3. Two-Component Organic-Mineral Resins (OMR): The Water-Inert Innovation

OMRs also comprise two components, but with a distinct chemical makeup:

Component A is a polysiliceous acid, such as sodium water glass, combined with a catalyst and additives.

Component B consists of isocyanates (MDI, its homologues, and isomers), similar to the other two-component system.

The main difference that sets OMRs apart is their inertness to moisture or water, unlike polyol-isocyanate based materials. This characteristic is crucial for applications where water is not desired for the reaction.

For OMR materials, the mixing of the components is particularly critical. Component A (inorganic water glass) and Component B (organic MDI) form an inhomogeneous system. The chemical reaction is significantly improved when the water glass (Component A) is disintegrated into smaller drops within the organic MDI phase, maximising contact between the components. Additives like silicones can assist by lowering the surface tension of the water glass, and optimal results are achieved through ultrasound mixing. The final hardened product is a resin with solid, closed pores of polysiliceous acid gel.

Understanding these chemical distinctions is key to selecting the appropriate PU grouting technology for various geotechnical challenges, ensuring effective strengthening, sealing, and stabilisation.

Feel free to contact us

njconstructionindia@gmail.com

+91 7028064790

NJ Waterproofing India, Building No. 1, Near Railway Level Crossing, Chembur Station Road, , Chembur (East), 36, Shell Colony Rd, Postal Colony, Chembur, Mumbai, Maharashtra 400071..