Description
SikaBiresin CR72 Epoxy System | Boat Supply Store
Address critical structural and fabrication needs with this advanced epoxy lamination system, engineered for superior adhesion and performance in challenging marine environments. Its low viscosity ensures excellent fiber wet-out, crucial for achieving dense laminates, while its UV resistance permits application both above and below the waterline. Designed for versatility, it supports wet layup, vacuum-bagging, and infusion processes, making it ideal for constructing high-stress components like hull reinforcements or bulkheads on high-performance craft.
Key Features
- High performance epoxy lamination system for demanding applications
- Low viscosity for superior fiber impregnation and reduced voids
- Versatile cure control with three hardener options (Fast, Medium, Slow)
- UV resistant for long-term durability in exposed marine conditions
- Above and below waterline suitability for comprehensive project coverage
- Environmentally compliant with RoHS and REACH standards
- Exceptional adhesion to all composite fabrics, including aramid fibers
- Optimized for advanced techniques like vacuum-bagging and infusion
Specifications
| Product Specifications | |
|---|---|
| Product | SikaBiresin® CR72 - Pale Amber - 1 Gallon |
| Brand | Sika |
| SKU | CWR83597 |
| Category | Boat Outfitting | Adhesives/Sealants/Tapes |
| MPN | 607393 |
| Color | Pale Amber |
| Size | 1 Gallon |
| Viscosity | Low |
| Hardener Options | CH72-1 Fast, CH72-2 Medium, CH72-3 Slow |
| UV Resistance | Yes |
| Waterline Application | Above and Below |
| Compliance | RoHS and REACH |
| Formulation | Non-styrene |
Who This Is For
Marine boat builders and repair technicians requiring a high-performance, versatile epoxy lamination system for demanding boat parts, tooling, and structural applications. DIY enthusiasts undertaking complex projects involving wet layup, vacuum bagging, or infusion will also find its properties highly beneficial.
How It Compares
| Feature | SikaBiresin CR72 Epoxy System | Medium |
|---|---|---|
| Viscosity | Low | — |
| Hardener Options | 3 (Fast, Medium, Slow) | 1 |
| UV Resistance | Yes | Good |
| Aramid Fiber Compatibility | Yes | Yes |
| Application Methods | Wet layup, Vacuum-bagging, Infusion | Laminating, Bonding, Coating, Fairing |
Common Concerns Answered
What are the potential limitations of SikaBiresin CR72?
While generally praised, availability of specific hardener types can be variable. Precise mixing ratios are critical for optimal performance, and like all epoxies, proper safety precautions, including ventilation and PPE, are essential during application.
Is SikaBiresin CR72 difficult to use?
Its primary buying objection might stem from a perception of complexity over simpler adhesives, or the initial cost. Novice users may also need to familiarize themselves with specific hardener selection and working time considerations.
What safety certifications does this product hold?
SikaBiresin CR72 is compliant with both RoHS (Restriction of Hazardous Substances) and REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) regulations, indicating adherence to environmental and safety standards.
Frequently Asked Questions
What is SikaBiresin® CR72 used for in marine applications?
SikaBiresin® CR72 is used for high-performance epoxy lamination in demanding marine structural applications, including hull components, bulkheads, and tooling, especially when using wet layup, vacuum-bagging, or infusion processes.
What are the benefits of using SikaBiresin® CR72 for boat building and repair?
Benefits include excellent wet-out due to low viscosity, strong bond formation to all fabrics (including aramid fiber), UV resistance, suitability for above and below waterline use, and compliance with environmental regulations, ensuring durable and reliable results.
Can SikaBiresin® CR72 be used for both above and below waterline applications?
Yes, SikaBiresin® CR72 is explicitly suitable for applications both above and below the waterline, providing a durable and water-resistant bond in diverse marine environments.
What hardener options are available for SikaBiresin® CR72?
Three hardener options are available: CH72-1 Fast for rapid cure, CH72-2 Medium for a balanced cure, and CH72-3 Slow for extended working times, allowing for precise control over the lamination process.
Is SikaBiresin® CR72 suitable for vacuum bagging and infusion processes?
Yes, SikaBiresin® CR72 is specifically designed and ideal for use in vacuum-bagging and infusion processes, thanks to its low viscosity which ensures excellent fiber saturation and reduced void content.
