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Prime Resins Prime Flex 900 XLV Cartridge
Prime Flex 900 XLV polyurethane resin is a low viscosity, hydrophilic resin that reacts with water and expands to form a closed cell, watertight foam. It is typically injected under pressure to seal actively leaking joints and cracks in concrete structures, including hairline cracks.
- Up to 600% expansion (unconfined)
- Low viscosity will penetrate tight cracks
- Extremely tough and flexible
$38.90
Availability:
In stock
( 54 Available )
SKU
PR 900 XLV-50-2:1
Prime Resins Prime Flex 900 XLV Cartridge
Prime Flex 900 XLV is a single-component, water-activated, hydrophilic polyurethane injection resin used to seal actively leaking joints and cracks in concrete, including tight and hairline cracks. It reacts with water and expands to form a closed cell, watertight foam. The extra low viscosity helps the resin penetrate fine cracks, and the cured foam is designed to remain tough and flexible for leak sealing in below-grade and water containment structures.
Key Features
- Water-activated polyurethane injection resin that expands to form a watertight foam.
- Extra low viscosity helps penetrate tight and hairline cracks.
- Up to 600% expansion (unconfined).
- Single-component installation; no catalyst or accelerators required.
- NSF/ANSI Standard 61 compliant for contact with potable water.
- Designed to remain tough and flexible after cure.
- Can be injected as a single component or as a twin stream with water.
Applications
- Actively leaking cracks and joints in concrete structures.
- Water treatment tanks and potable water structures.
- Dams and water-retaining concrete.
- Below-grade concrete walls.
- Tunnels, manholes, and utility structures.
- Elevator service pits and similar wet environments.
Technical Specifications:
| Property | Value |
|---|---|
| Resin Type | Single-component, water-activated, hydrophilic polyurethane injection resin |
| Solids Content | 88% |
| Viscosity (73°F / 23°C) | 250 to 350 centipoise |
| Expansion (Unconfined) | Up to 600% |
| Tensile Strength, Cured (ASTM D-3574) | 450 psi |
| Tensile Elongation, Cured (ASTM D-3574) | 350% |
| Tear Resistance, Cured (ASTM D-3574) | 21 lb/in |
| Shrinkage (ASTM D-1042 / D-756) | Less than 2% |
| Reaction Times at 73°F (23°C) | Initial reaction: 30 seconds; Full rise: 1 minute 50 seconds; Full cure: 24 hours |
| Mixing / Activation | Uses available water to initiate reaction; inject as a single component or twin stream 2 parts resin to 1 or 2 parts water |
| Storage Conditions | Store dry between 40°F and 80°F (4°C to 27°C) |
| Shelf Life | 18 months from date of manufacture in unopened containers properly stored |
| Cleanup | Flush injection equipment with Prime Flex Eco Flush |
Frequently Asked Questions
How does Prime Flex 900 XLV react and seal leaks?
The resin reacts with water and expands to form a closed cell, watertight foam inside the crack or joint.
What types of cracks is it designed for?
It is used for actively leaking joints and cracks in concrete structures, particularly tight and hairline cracks.
Does it require mixing before use?
No. It is a single-component resin. It uses available water to initiate the reaction.
Can it be used in potable water structures?
Yes. It is NSF/ANSI Standard 61 compliant for contact with potable water.
What is the best way to handle cold temperature conditions?
Cold temperatures will slow reaction time and increase viscosity. Condition material to 70 to 80°F (21 to 27°C) prior to use.
How should injection equipment be cleaned?
Flush injection equipment with Prime Flex Eco Flush. Clean cured material by mechanical removal.
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