PRO-SET High Temperature Surface Coat Hardener HTP-288
Description
PRO‑SET® HTP‑288 High‑Temp Surface Coat Epoxy Hardener ONLY
PRO‑SET® HTP‑288 is a high‑temperature epoxy hardener formulated for use with PRO‑SET® HTP‑187 High‑Temp Surface Coat Epoxy Resin in composite tooling and part manufacturing applications. Together, this system produces durable, high‑quality surface coats with excellent thermal stability and cosmetic finish.
When properly post‑cured with HTP‑187 resin, the system can achieve a glass transition temperature (Tg) up to 270°F (132°C). The cure profile is designed to provide practical working time for brush application while supporting strong adhesion to subsequent laminate back‑up layers.
This product includes the hardener only. Must be mixed with PRO‑SET® HTP‑187 surface coat resin at the specified mix ratio to achieve proper cure and performance.
Key Features
- High‑temperature epoxy hardener for surface coat systems
- Designed specifically for HTP‑187 surface coat resin
- Supports smooth, cosmetic mold and part surfaces
- Balanced working time for brush application
- Strong adhesion to laminate layers
- High thermal stability after post cure
Processing Notes
- For composite tooling and mold surface coats
- Typical working time approximately 2–3 hours at room temperature
- Additional coats may be applied during the tacky window
- Laminating steps typically begin after initial room‑temperature cure
- Elevated temperature post cure required for full heat resistance
Typical Applications
- Composite mold surface coats
- High‑temperature tooling faces
- Cosmetic composite part surfaces
- Brush‑applied epoxy surface systems
Specifications
Surface Coat Hardener Comparison (Verified)
| Speed | Typical Working/Open Time* | Initial Gel / “Green” | Best For | Notes |
|---|---|---|---|---|
| Slow (HTP-288) | ~2-3 hr | ~6-8 hr | Large layups, complex schedules | Longer wet-out window at room temp. |
*Times are approximate; actual values vary with temperature, batch size, and layup. †Published at ~29 °C / 85 F; at ~25 °C / 77 °F expect slightly longer.
Use only with PRO-SET Surface Coat Resin (Z-1805).