Description
Sikaflex 291 Fast Cure Adhesive Sealant White | Boat Supply Store
For urgent marine repairs or construction where rapid strength gain is paramount, this 1-component, marine-grade polyurethane elastomeric adhesive and sealant provides a solution. It exhibits excellent adhesion to common marine substrates including gelcoat, fiberglass, metal, and wood, building strength quickly for time-sensitive applications. Furthermore, its durability extends to resistance against saltwater and UV exposure, and it is NSF approved for potable water applications (black and white only) and USDA approved for incidental food contact.
Key Features
- Rapid Strength Gain for time-critical applications
- Superior Adhesion to gelcoat, fiberglass, metal, and wood
- Marine-Grade Polyurethane for robust, flexible bonds
- Versatile Use above and below the waterline
- Saltwater Resistant for harsh marine environments
- Paintable & Sandable post-application for finishing
- NSF Approved for potable water systems (black & white only)
- USDA Approved for incidental food contact scenarios
Specifications
| Product Specifications | |
|---|---|
| Cure Type | Polyurethane |
| Waterline Use | Above and below |
| Paintable | Yes |
| Sandable | Yes |
| NSF Approved for Potable Water | Yes (black and white only) |
| USDA Approved for Incidental Food Contact | Yes |
| Volume | 10.3oz (300ml) |
| Color | White |
| Form | 1-component elastomeric adhesive and sealant |
Who This Is For
Marine professionals and DIY boat owners requiring a fast-curing, highly versatile, and exceptionally durable adhesive and sealant for a broad spectrum of marine applications.
How It Compares
| Feature | Sikaflex 291 Fast Cure Adhesive Sealant White | Competitor |
|---|---|---|
| Cure Type | Polyurethane | Polyurethane |
| Waterline Use | Above and below | Above and below |
| Paintable | Yes | Yes |
| Sandable | Yes | Yes |
| NSF Approved for Potable Water | Yes (black and white only) | No |
Common Concerns Answered
What if I need to remove the sealant later and it's fully cured?
Once fully cured, Sikaflex® 291 can be challenging to remove if a permanent bond is not desired. It is engineered for long-term adhesion, so careful consideration of its permanent nature is advised before application. For temporary or removable bonds, alternative products might be more suitable.
Do I need a special tool to apply this sealant?
Application requires a standard caulking gun, which is sold separately. Ensuring you have the correct applicator tool prior to starting your project will facilitate a smooth and efficient installation process.
What about the smell during application?
As with many polyurethane-based products, Sikaflex® 291 may have a noticeable odor during application. Ensuring adequate ventilation in the work area is recommended to mitigate this during use.
Frequently Asked Questions
Can Sikaflex 291 be used above and below the waterline?
Yes, Sikaflex® 291 is specifically designed for use both above and below the waterline in marine environments.
Is Sikaflex 291 paintable and sandable?
Yes, Sikaflex® 291 is both paintable and sandable after it has cured, allowing for seamless finishing.
What surfaces does Sikaflex 291 adhere to?
Sikaflex® 291 exhibits excellent adhesion to a wide range of common marine substrates including gelcoat, fiberglass, metal, and wood.
Is Sikaflex 291 NSF approved for potable water?
Yes, Sikaflex® 291 is NSF approved for potable water applications, but this approval is specifically for the black and white color formulations only.
What is the cure time for Sikaflex 291?
Sikaflex® 291 offers a fast cure time with rapid strength build-up. Specific cure times will vary based on ambient temperature, humidity, and bead size.
