English
An Injectable Sealant is a specialized, high-performance material designed to penetrate, fill, and permanently seal cracks, voids, and leaks in various substrates. Unlike surface-applied coatings, these sealants are injected under pressure directly into the defect, ensuring the repair reaches the deepest point of the problem. They are engineered to cure or harden into a durable, flexible, and often waterproof barrier, restoring structural integrity and preventing further damage. Commonly used in construction, civil engineering, automotive, and manufacturing, injectable sealants are the go-to solution for long-lasting, reliable repairs where access is limited or surface treatments are insufficient.
The versatility of injectable sealants makes them indispensable across multiple sectors. Here are their primary applications:
Our advanced injectable sealant is formulated for maximum performance and reliability. The following tables detail its key properties and application specifications.
| Property | Value/Description | Test Standard |
|---|---|---|
| Base Chemistry | High-strength, flexible polyurethane hybrid | - |
| Consistency (Mixed) | Low viscosity liquid, thixotropic | ASTM D2196 |
| Color | Light Gray | Visual |
| Density (Mixed) | 1.15 g/cm³ | ASTM D1475 |
| Mix Ratio (by volume) | 1:1 | - |
| Pot Life @ 25°C (77°F) | 45 minutes | ASTM D2471 |
| Cure Time to Tack-Free | 4-6 hours | ASTM D2377 |
| Full Cure Time | 24 hours | - |
| Shore A Hardness (Cured) | 65 ± 5 | ASTM D2240 |
| Tensile Strength | 4.8 MPa (700 psi) | ASTM D412 |
| Elongation at Break | >350% | ASTM D412 |
| Adhesion to Concrete (Pull-off) | >2.0 MPa (290 psi) - Concrete substrate failure | ASTM D4541 |
| Water Absorption (7 days) | < 3% by weight | ASTM D570 |
| Service Temperature Range (Cured) | -40°C to 80°C (-40°F to 176°F) | - |
| Parameter | Specification |
|---|---|
| Crack Width Capability | 0.1 mm (0.004 in) to 25 mm (1 in) and wider voids |
| Injection Pressure Range | Recommended 50 - 200 psi (3.5 - 14 bar) |
| Packaging | 600ml Dual-Cartridge, 5-gallon Pail Kit, 55-gallon Drum Kit |
| Coverage (Approx. per 600ml Cartridge) | Linear: ~15-20m in a 3mm crack. Volume: Depends on void size. |
| Suitable Substrates | Concrete, masonry, stone, wood, most metals, GRP, many plastics |
| Chemical Resistance (Cured) | Excellent resistance to water, dilute acids, alkalis, salts, oils, and fuels. |
| UV Resistance | Good; for constant exterior exposure, a protective coating is recommended. |
| Shelf Life (Unopened, in original packaging) | 12 months from date of manufacture when stored at 10-25°C (50-77°F) |
Q: What is the main advantage of using an injectable sealant over a standard surface crack filler?
A: The primary advantage is depth and completeness of repair. Surface fillers only address the top of a crack, leaving the underlying void prone to water movement and further cracking. An injectable sealant is forced deep into the crack, filling it from the bottom up, creating a full-depth, monolithic seal that blocks water migration and restores structural continuity.
Q: Can your injectable sealant be used on active leaks, or does the area need to be completely dry?
A: Yes, our specific formulation is hydrophobic and can actively displace water. It is designed for use on actively leaking cracks, making it ideal for emergency repairs or situations where dewatering is impossible. It cures in the presence of moisture, forming a tight seal.
Q: How flexible is the cured sealant? Will it handle structural movement or thermal expansion?
A: Flexibility is a key feature. With an elongation at break exceeding 350%, the cured sealant is highly elastic. It can accommodate normal thermal expansion/contraction cycles, live loads, and minor structural movements (up to +/- 25% joint movement) without losing adhesion or integrity, preventing the crack from re-opening.
Q: What injection equipment do I need to apply this sealant?
A: For cartridge sizes, a standard caulking gun works for small jobs. For professional or larger-scale applications, we recommend a dedicated diaphragm pump or piston pump capable of delivering between 50-200 psi. Proper equipment ensures consistent material flow and complete void filling.
Q: Is the sealant safe to use indoors or in confined spaces?
A: During application, ensure adequate ventilation. While the mixed product has a low odor and contains no volatile organic compounds (VOCs) above regulated limits, we recommend using standard personal protective equipment (PPE) such as safety glasses, gloves, and long sleeves. Refer to the Safety Data Sheet (SDS) for complete handling instructions.
Q: How long does the repair last?
A: When applied correctly to a prepared substrate, an injectable sealant repair is designed to be permanent, lasting the lifetime of the surrounding structure. Its superior adhesion, flexibility, and resistance to environmental factors prevent the common failure modes of brittle, surface-level patches.
Q: Can it be painted over or coated after curing?
A: Absolutely. Once fully cured (after 24 hours), the sealant provides an excellent substrate for most industrial and architectural coatings, including epoxy, urethane, and acrylic paints. A light sanding can improve mechanical adhesion for the topcoat.
Q: What is the difference between polyurethane, epoxy, and acrylic injectable sealants?
A: Polyurethane (like ours) is highly flexible, hydrophobic, and excellent for moving cracks and wet conditions. Epoxy sealants are very rigid and high-strength, best for static, structural bonding but less tolerant of movement. Acrylics are typically water-based, less durable, and used for non-critical, cosmetic fills. Our hybrid polyurethane offers the ideal balance of strength and flexibility.
