Sea Hawk Hawk Epoxy C1 Ultra Slow Catalyst is part of the Hawk Epoxy system and is formulated for use with Hawk Epoxy R1 Resin.
C1 is designed for construction and repair applications requiring a very slow cure speed. Its extended working time makes it particularly suitable for use at higher temperatures or when additional application time is required.
When combined with R1 Resin, C1 provides excellent adhesion, strength, bonding, filling, and moisture-barrier properties for a wide variety of marine construction and repair applications.
The Hawk Epoxy system can be used for bonding, fairing, coating, waterproofing, fiberglass construction, and repair. Hawk Epoxy fillers can also be incorporated into the resin and catalyst mixture to modify the system for specific bonding, filling, or fairing applications.
C1 Ultra Slow Catalyst mixes with R1 Resin at a 3:1 ratio by volume.
| Specification | C1 Ultra Slow Catalyst |
|---|---|
| Product Type | Epoxy Catalyst |
| Compatible Resin | Hawk Epoxy R1 Resin |
| Cure Speed | Ultra Slow |
| Mix Ratio by Volume | 3:1 – R1 Resin : C1 Catalyst |
| Mix Ratio by Weight | 3.6:1 |
| Viscosity at 77°F | 65–75 KU |
| Pot Life | 40–50 minutes |
| Pot Life Test | 4 oz. mixture at 77°F |
| Primary Application | Higher temperatures / extended working time |
Technical values are from Sea Hawk's Hawk Epoxy TDS.
C1 Ultra Slow Catalyst is intended for applications where a long working time is needed. Sea Hawk identifies C1 for use in the warmest conditions or when more application time is required.
At the manufacturer's reference conditions, the R1/C1 system provides approximately:
| Property | R1 + C1 |
|---|---|
| Pot Life | 40–50 minutes |
| Working Time | 3–4 hours |
| Cure Time | 20–24 hours |
| Cure to Working Strength | 4–9 days |
| Resin/Catalyst Ratio | 3:1 |
These times are manufacturer reference values and vary with temperature and application conditions.
Important: Sea Hawk specifies that the R1/C1 combination should not be used under Sea Hawk marine wood varnish.
Sea Hawk Hawk Epoxy R1 Resin
Sea Hawk Hawk Epoxy Fillers F1–F6
Sea Hawk Hawk Epoxy Pump Kit – uses the dedicated C1/C5 Catalyst Pump for C1.
| Size | C1 Catalyst |
|---|---|
| Size 1 | 0.66 Pint |
| Size 2 | 0.33 Gallon |
| Size 3 | 1.45 Gallon |
