Air-Dry Two-Component Chemical-Resistant Coating
Key specifications
| Property | Value |
|---|---|
| Dry film thickness | 20–40 μm (0.8–1.6 mil) |
| Mix ratio | 10 : 1 |
| Cure | Touch-dry 4 h; full cure 72 h ambient, or 170 °C (338 °F) / 30 min |
| Neutral salt spray | > 1,200 h |
| Pencil hardness | 2H–4H |
| Chemical resistance | Acid and alkali resistant |
| Application | Spray |
| Substrates | Aluminium, copper, stainless steel |
Laboratory values from the coating data sheet.
Suitable for
- Suitable: Complete outdoor units that cannot enter an oven
- Suitable: Wastewater plants, H₂S and chemical exposure
- Suitable: Fertilizer, livestock and ammonia environments
- Suitable: Site application and repair of installed equipment
Not suitable for
- Not suitable: High-density fins where heat transfer must be preserved — use PG-S1
- Not suitable: Dip coating; PG-C is applied by spray
- Not suitable: Air freight without dangerous-goods handling
- Not suitable: Parts that must be packed the same day — full cure takes 72 hours ambient
Matches these environments
Compare with other systems
| System | Film thickness | Cure | Best for |
|---|---|---|---|
| PG-S1 Waterborne polysiloxane (sol-gel) | 5–15 μm | Thermal or ambient | New coils before shipment, OEM dip lines |
| PG-S2 Polysiloxane-urethane clearcoat | 5–10 μm | 160 °C / 60 min | Aluminium radiators, bakeable heat exchangers |
| PG-W Waterborne two-component | 5–10 g/m² per side | 80 °C touch-dry | Coil lines, mild coastal and humid sites |
| PG-CThis system Air-dry two-component, chemical-resistant | 20–40 μm | Ambient 72 h | Complete units, chemical and wastewater sites |
Where PG-C fits
PG-C covers the jobs thin films cannot: complete units that must not be baked, installations near wastewater and chemical plants, and coating on site. It is sprayed at 20–40 μm, touch-dry in four hours and fully cured after 72 hours at ambient temperature.
Film thickness and fins
The thicker film is what gives PG-C its chemical resistance, but it also narrows the gap between fins. On high-density coils, spray technique and a bridging check after coating matter more than with thin films.
Related
- ServiceFull-Unit Corrosion Protection for Outdoor Units
- ComparisonsAir-Dry vs Baked Coil Coatings
- ServiceSpray Coating for HVAC Coils
- ComparisonsThin-Film vs Thick-Film Coil Coatings
- ServiceCoil Coating Repair Kits for Field Application
- ComparisonsEpoxy vs Polyurethane Coil Coatings
Also see
- ComparisonsPhenolic vs Epoxy Coatings
Can PG-C be baked to speed up the cure?
Yes. It cures in 30 minutes at 170 °C, but complete units cannot be baked, so ambient cure is the usual route.
Does the thicker film reduce heat transfer?
A 20–40 μm film has more effect than a 5–15 μm film, especially where it bridges fins. PG-C is chosen when chemical resistance matters more than a small efficiency loss.
Is PG-C shipped as dangerous goods?
It is solvent-based and is expected to ship as dangerous goods. The safety data sheet with the transport classification is supplied with the quote.
Tell us the equipment, the site and the destination port. We reply within 24 hours.