Description
Chem-Set H2O Glue Underwater Epoxy is a two-part, room-temperature curing epoxy designed for bonding gunite, concrete, stone, and other porous surfaces. It is formulated to cure in wet conditions, including fully submerged applications, making it suitable for pool and marine repairs where draining is not practical.
With a 45-55 minute working time at 25°C, this epoxy allows for careful placement and larger repair areas. The paste is thixotropic and will not sag up to 10 mm, making it reliable for vertical and overhead repairs.
Key Features
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Designed for gunite, concrete, masonry, and stone
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Cures underwater and in damp environments
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45 to 55 minute working time at 25°C
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Non-sagging up to 10 mm
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Toughened epoxy paste for durable, long-term repairs
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Resistant to moisture and weather exposure
Common Applications
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Repairing cracks in gunite pools without draining
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Concrete patching in pools and spas
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Bonding stone or masonry in damp or submerged areas
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Replacing tiles in concrete pools
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Installing non-slip safety strips on pool steps
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Repairs in fountains, docks, and other water features
Technical Specifications
| Property | Value | Test Method |
|---|---|---|
| Color (Mixed) | Gray Paste | Visual |
| Specific Gravity | 1.4 | ASTM D-1475 |
| Viscosity | Thixotropic | ASTM D-2196 |
| Pot Life (100 g @ 25°C) | 45–55 minutes | — |
| Mix Ratio | 1:1 by weight or volume | — |
| Flexural Strength | 43 MPa | ISO 178 |
| Flexural Modulus | 1800 MPa | ISO 178 |
| Tensile Strength | 31 MPa | ISO 527 |
| Tensile Modulus | 1600 MPa | ISO 527 |
| Elongation at Break | 4.2% | ISO 527 |
Substrate Compatibility
| Material | H2O Glue Aquabonder | H2O Epoxy | H2O Glue Fast-Set |
|---|---|---|---|
| Fiberglass | ✅ Excellent | ✅ Excellent | ✅ Excellent |
| Vinyl Liner | ✅ Good | ❌ Not Recommended | ✅ Good |
| Gunite / Concrete | ❌ Not Recommended | ✅ Excellent | ❌ Not Recommended |
| Glass, Porcelain, Ceramic Tile | ✅ Good | ❌ Not Recommended | ✅ Excellent |
| Metal | ✅ Good | ❌ Not Recommended | ✅ Good |
| Acrylic | ✅ Excellent | ❌ Not Recommended | ✅ Excellent |
| PVC | ✅ Excellent | ✅ Excellent | ✅ Excellent |
| Stone | ✅ Good | ✅ Excellent | ✅ Good |
| Painted Surfaces* | ✅ Good | ✅ Good | ✅ Good |
| Epoxy-Coated* | ✅ Good | ✅ Good | ✅ Good |
| Polyethylene / Polypropylene** | ❌ Not Recommended | ❌ Not Recommended | ❌ Not Recommended |
* Bond strength depends on coating condition
** Surface treatment required and not possible underwater
Packaging and Handling
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Supplied in dual cartridges for controlled dispensing
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1:1 mix ratio by weight or volume
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Store sealed at room temperature
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Shelf life is listed on packaging
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Available in cartridge and bulk sizes
H2O Product Family
The H2O line offers tailored underwater bonding solutions:
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H2O Glue Aquabonder Structural Adhesive – best for metals, plastics, and tile
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H2O Glue Fast-Set Underwater Structural Adhesive – rapid-cure for emergency repairs
- H2O Non-Slip Treads – durable, safety enhancing streads for pool stairs
See the complete H2O Adhesives & Accessories Collection for the full family.
Why Chemical Concepts?
For decades, Chemical Concepts has provided advanced adhesives for pool, spa, and marine industries. Our H2O family delivers specialized performance for underwater bonding challenges.
📞 Call 800-220-1966 or request a quote online today.
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