USC - Duraglas

For rotted-out metal, dents, cracks or holes:

1. Securely fasten, anchor or weld all parts or panels to be filled to prevent separation and cracking. Sand or grind damaged area to bare metal or through fiberglass gel coat (24 or 36 grit recommended).

2. Neutralize any flux remains and thoroughly clean surface of any dirt, oil, grease, wax, paint, rust, silicone or any other contaminants.

3. Dry the entire area completely with a clean, dry and lint-free cloth.
For broken fiberglass: Cut out all damaged fiberglass and “V” groove the sides to be repaired.
For large holes: Cut enough fiberglass cloth or screen to cover hole and extend well back into the side.
For small holes, cracks and dents: Fiberglass backing is not needed.

For best results, bring filler and provided hardener to room temperature (minimum temperature 65ºF). Before removing filler from container, thoroughly mix from bottom to top. Knead hardener tube. Place desired amount of filler on USC nonabsorbent plastic mixing board. To a golf ball size of filler, add 1½” ribbon of hardener or 2% by weight. Blend hardener and filler completely using a folding action forcing air out.

NOTE: The use of too much or too little hardener may cause pinholes, poor adhesion, soft cure or poor workability, etc.

For larger holes, cracks and dents:

1. Apply only on properly prepared surfaces (see SURFACE PREPARATION). Before filling, the surface must be a minimum temperature of 65º F.

2. Coat one side of fiberglass cloth or screen generously with mixture and place over hole, wet side against repair. Flatten and smooth around edges using spreader to squeegee any air bubbles and to assure adhesion.

3. Gently press the center of cloth/screen to create a slight dip, leaving room for the next coat(s) of mixture. Allow ample time to cure (10-15 minutes).

4. Mix additional filler and apply to repaired area, building up to the original contour.

5. IMPORTANT! DO NOT RETURN UNUSED MIXTURE TO CAN AS IT WILL HARDEN THE REMAINING CONTENTS.

When material has hardened (approximately 15-20 minutes), sand, then featheredge repaired area to desired contour.