Tooling Gelcoat (Gray, Dimensionally Stable)
Key Features
- Low shrinkage for dimensional accuracy in precision molds
- Barcol 50–56 hardness for long production life
- Medium gray for easy surface defect inspection
- Pre-accelerated with cobalt for convenient MEKP cure
- Compatible with polyester and vinyl ester tooling laminates
This gray dimensionally stable tooling gelcoat is formulated on a modified isophthalic resin with low shrinkage and high thermal stability for mold construction where surface accuracy and long-term dimensional stability are paramount. The medium gray color provides an ideal inspection surface. Barcol hardness after post-cure (60°C/8 h) reaches 50–56. HDT is 75–90°C. Gel time at 20°C with 1.5% MEKP is 35–60 min. Apply at 0.5–0.8 mm in 2–3 passes. Pre-accelerated with cobalt. Compatible with all polyester and vinyl ester tooling laminates. Suitable for marine, automotive, and wind energy tooling where repeatable part geometry is critical.
Specifications
| Parameter | Value |
|---|---|
| HDT | 75–90°C |
| Appearance | Gray thixotropic paste |
| Resin Base | Modified Isophthalic UPR |
| Shelf Life | 6 months at 18–22°C |
| Gel Time (20°C, 1.5% MEKP) | 35–60 min |
| Film Thickness (recommended) | 0.5–0.8 mm |
| Barcol Hardness (post-cure 60°C/8 h) | 50–56 |
Applications
FAQ
Post-cure at 60°C for 8 hours after at least 24 hours ambient cure. This achieves Barcol 50–56 and HDT 75–90°C. For molds requiring higher temperature service, use the high-temp black tooling gelcoat with 80°C post-cure.
Direct Contact
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