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+1 (561) 757-5620
DESCRIPTION AND RECOMMENDED USES: 100% solids, Dura-Coat Rebuid Underwater 121 is a surface tolerant two component ambient-temperature curing epoxy putty. It is designed particularly as a rebuilding material for metals in wet or underwater application. Dura-Coat Rebuid Underwater 121 is convenient-to-use, non-sagging with good chemical resistance and high mechanical strength.
| Maximum Temperature (Dependent on service) | Wet Service | Dry Service | 90°C | 160°C | 194°F | 320°F |
|---|---|---|---|
| Chemical Resistance | Water | Alkalis | Inorganic Acids | Organic Acids | Organic Solvents | Excellent | Excellent | Good | Good | Good | |
| Solids by Volume | 100% | ||
| Viscosity | Paste | ||
| Mixed Density | 1.8 | ||
| Shore D Durometer Hardness | (ASTM D 2240) | 85 | |
| Pot life | 25 MIN / KG at 72ºF | ||
| Vertical SAG Resistance at 21ºC (70ºF) and 12.7mm (500mils) | No sag | ||
| Coverage for 10Kg kit | 60sf @40mils | 5.6m2 @1mm | |
| Mix Ratio | 2:1 by weight | Base: Activator | |
| Color | Grey as standard. Blue and Red optional. Other colors contact the manufacture | ||
| Shelf life (unopened containers) | 3 years at 55-95ºF (13-35ºC) | ||
Surface Preparation
Dura-Coat Rebuild Underwater 121 is a surface tolerant coating for easier application, however, proper surface preparation is critical to the long-term performance of this product, so the best possible surface preparation should be done. As minimum, the substrate must be firm and free of loose corroded material, mill scale, dust, and any other loose debris. Power tool clean preparation, SSPC- SP11 is the minimum recommended surface preparation.
Mixing
Thoroughly mix Activator into Base with mixing stick or drill with low-speed mixing blade scraping sides and bottom of container or mixing board. Mix by weight 2-parts Base to 1-part Activator. Mix thoroughly to produce an even colored and streak-free material. THINNING: Never thin.
Application
Use heavy plastic squeegee or putty knife. Work material into profile of substrate to achieve maximum adhesion and to remove any entrapped air. Contour to correct form with putty knife or plastic applicator. If mold or form is used, coat its surface with a release agent to prevent adhesion of the material. Machining is possible using carbide tipped tools. Grinding is possible if done within 14 hours of application at 77ºF, 25ºC (add 1-1/2 hour for each 10ºF below 77º, subtract 1 hour for each 10º above 77ºF). Large holes and cracks can be bridged with glass or metal cloth.
| 16°C (60°F) | 25°C (77°F) | 32°C (90°F) | |
|---|---|---|---|
| Tack Free | 4 hours | 2 hours | 1 hour |
| Light Load | 12 hours | 6 hours | 3 hours |
| Overcoat End | 16 hours | 10 hours | 5 hours |
| Full Load | 24 hours | 12 hours | 6 hours |
| Full Chemical | 48 hours | 24 hours | 12 hours |
Clean Up
Tools must be immediately cleaned after usage by using industrial alkaline detergent.
Safety
Before using any products, review the appropriate Safety Data Sheet (SDS) or Safety Sheet for your area. Follow standard confined space entry and work procedures, if appropriate.