902-046 Duratec Black Hi-Gloss Topcoat - 1 Gal

Description

Duratec® Pigmented Hi-Gloss Topcoat is a self-leveling, air-cured polyester coating designed for patterns and molds. It cures rapidly to a hard, glossy surface that sands and polishes easily, achieving a final gloss over 90%. The finish will not dull during mold making, helping you produce a high-gloss tooling surface.

Catalyst (MEKP-925) is not included and must be purchased separately.

Typical Uses

Composite plugs, patterns, wood surfaces, and other applications where an air-cured, thin-film finish is desired (including mold resurfacing).

Features & Benefits

• Labor savings: Smooth, self-leveling surface minimizes sanding; patterns can often be finished the day after application. High gloss also shortens mold prep.
• Superior finish: Porosity-free coating produces glossy patterns that retain up to 98% of initial gloss after the mold-making process.
• Resists fisheyes: Additive package reduces fisheyes and pinholes during spray application.
• Air-cure chemistry: Achieves a complete cure even at 10 mils (≈250 microns) film build.

Usage & Safety Guidelines

• Review the relevant Duratec product SDS/TDS before use.
• Machine-agitate or mix for 5 minutes prior to application.
• Do not apply below 64 °F (18 °C). Maintain a clean, dust-controlled area.

Recommended Application Procedure

• Catalyst (MEKP): Syrgis 925 used for QC. Other 9%-oxygen MEKP-type catalysts are acceptable. Add at 2% by volume (≈1.8% by weight). Adjust for conditions: hot → 1.5%, cold → 2.25%. Mix thoroughly.
• Pot Life Extender: Add Duratec Pot Life Extender after catalyzation to double pot life. Use 2% for polyester primers (7## codes) and 0.5% for vinyl ester primers (17## codes).
• Thinner: Usually not required. If needed, use Duratec LAC-39. Do not use acetone or generic lacquer thinners (may contain incompatible solvents or excess water).
• Spray Equipment: HVLP spray gun recommended. Use a 1.8 mm tip for pattern coatings (primers may require larger). Set needle and fan for a wide, even fan. Use the lowest pressure that provides proper atomization to reduce turbulence, overspray, and orange peel.
• Surface Prep: Sand to 220-grit. Wipe with a rag wetted with acetone. Do not use tack rags that can transfer contaminants.
• Spray Technique: Apply a fine mist coat first (not a continuous film). Allow ~2 minutes flash. Apply build coats of 4–5 mils, working in opposing directions, with 2–15 minutes between coats for solvent evaporation. Hold the gun at ~90° to the surface and ~18 in away.
• Recoat/Cure: Apply subsequent coats before the previous coat has fully tacked off (wet enough to transfer to a fingertip). If it has cured and will not transfer, allow full cure and sand before continuing.
• Film Build & Finish: Build to at least 10 mils. Allow full cure, then sand. Wait at least 8 hours before polishing.

Refer to the Technical Data Sheet (TDS) and Application Guide for complete instructions, cure schedules, and equipment recommendations.