BOSTIK 920
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- Flexible Cured Adhesive
- Above- and Below-the-Waterline Sealing and Bonding
- Plastic, Wood, and FRP Bonding
Product Description
Bostik Marine 920 Urethane Adhesive/Sealant is a one-component, moisture-curing, gun-grade polyurethane adhesive and sealant formulated for above- and below-the-waterline marine sealing and bonding applications. The cured elastomeric seal provides excellent tear and abrasion resistance while maintaining permanent flexibility and strong adhesion to common marine substrates including wood, metals, fiberglass-reinforced plastic (FRP), and most plastics. It can be used as either an adhesive or a sealant for a wide range of marine assembly and maintenance applications.
Key Features
- One-component moisture-curing polyurethane forms a tough, resilient elastomeric seal.
- Excellent adhesion to wood, metals, fiberglass-reinforced plastic (FRP), and most plastics.
- Excellent tear and abrasion resistance while maintaining permanent flexibility.
- Suitable above and below the waterline for marine sealing and bonding applications.
Applications / Suitable For
- Above- and below-waterline marine sealing
- Deck-to-hull assembly
- Hull seams
- Keel joints
- Sealing around marine windows and doors
- Under moldings
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Process MethodProcess Method
Moisture curingProduct TypeProduct Type
Polyurethane adhesive/sealantThermal Properties
Operating TemperatureOperating Temperature
-40°F to +180°F (intermittent) °CAdditional Information
Technical Properties
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Method / Condition |
|---|---|---|---|
| Technology | One-component polyurethane adhesive/sealant | — | Moisture curing |
| Tool / work life | 70 | minutes | Typical uncured property |
| Tack-free time | 6 | hours | Typical uncured property |
| Curing time | 3–6 | days | 77°F (25°C) |
| Flow, sag or slump | 0.1 | inch | Typical uncured property |
| Staining | None | — | Typical uncured property |
| Shelf life | 12 months | — | Stored at or below 80°F (27°C) |
Technical Properties
After-Processing / Final-State Properties
| Property | Value | Unit | Method / Condition |
|---|---|---|---|
| Shore A hardness | 38 | Shore A | After 14 days at 77°F and 50% RH |
| Modulus @ 100% elongation | 70 | psi | Typical cured property |
| Tensile strength | 180 | psi | Typical cured property |
| Elongation | 950 | % | Typical cured property |
| Adhesion in peel | >35 | piw | Typical cured property |
| Joint movement capability | ±25 | % | Typical cured property |
| Ozone resistance | Excellent | — | Typical cured property |
| UV resistance | Good | — | Typical cured property |
| Temperature resistance | -40 to 180 | °F | Intermittent contact |
