Water Proofing
Re-injectable Grouting Tube
PVC-nitrile re-injectable grouting tube enabling durable, maintainable leak repair with cement, epoxy, or polyurethane grout injection.
Download Technical DatasheetManufactured under ISO 9001:2015 certified quality systems, built to specification for OEM and infrastructure applications.
Overview
The Re-injectable Grouting Tube from Maruti Techno Rubber Pvt. Ltd. is an efficient solution for waterproofing and leak repair in concrete structures. Made of flexible PVC-Nitrile rubber with sponge strips reinforced by nylon braiding, it is installed in joints to seal cracks and voids, preventing future leakage. Its re-injectable design allows for the use of cement-based grouts, epoxy, or polyurethane, providing a durable, adaptable waterproofing solution and enabling future maintenance if needed.
Material Structure & Components
- Construction Material
• Solid PVC-Nitrile (TPR) core – flexible, chemical- and pressure-resistant.
• Sponge sealing strips, often reinforced with nylon braiding. - Core Design
• Central injection channel with staggered lateral ports for even distribution.
• Sponge strips act as valves, compressing to allow injection and resealing for watertightness.
Key Features & Benefits
- Future-Proof Waterproofing: Re-injectable design enables easy maintenance even after construction.
- Versatile Grouting: Compatible with cement, epoxy, and polyurethane for project-specific needs.
- Effective Leak Sealing: Ensures precise injection for a tight seal around cracks and joints.
- Cost-Effective: Minimizes long-term maintenance without demolition or replacement.
- Durable: Made from high-quality, weather-resistant materials.
- Easy Installation: Embedded in concrete during construction without special tools.
- Environmentally Safe: Non-toxic, safe for potable water systems.
- Flexible: Accommodates minor concrete movements from thermal or settling shifts.
Functional Design Concepts
- PVC / TPR Inner Core - Handles internal pressure during injection, prevents collapse
- Sponge Sealing Strip - Expands to seal and prevents leaks; allows reinjection by compressing
- Nylon Braiding - Structural integrity and reinforcement
- Discharge Ports (5φ @ 180°) - Ensures even material spread across the joint
- Vent Ends / Nipple - Allows injection access and air escape
- Shrink-on Sleeves - Prevent vent-end leakage and fouling
Installation
- Concrete surface where reinjectable hoses are to be installed are to be clean, dry, smooth and free from dirt
- The grouting tube must be located as close as possible to the centre line of the wall or slab, with only the vent end crossing the grouting tube.
- Initial injection pressure should be approximately 70-160 psi. Once the injection material has filled the joint area and is to 550-650 psi, maintain this pressure for 3-5 minutes, allowing for the injection material to thoroughly penetrate the weak area.
- Piston type pumps shall be used with hydrophilic resin injections.
Applications
- Basement Waterproofing: Prevents water ingress and allows future crack grouting.
- Tunnels & Underground Structures: Protects against leakage in tunnels, subways, and utilities.
- Sewer & Wastewater Systems: Seals joints in sewage lines and treatment plants.
- Dams & Reservoirs: Maintains water-retaining integrity and allows easy crack repair.
- Industrial Buildings: Provides long-term waterproofing for sensitive areas.
- Water Treatment Plants: Seals joints under high water pressure and chemical exposure.
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