PPG PR-1770 A-2 is a two-part, high-temperature-resistant, Class A (brushable) polysulphide fuel tank sealant for use from −55 °C to +180 °C. Based on Permapol® P-5 polymers and manganese dioxide cured, it resists aircraft fuels and lubricating oils as well as degradation by phosphate ester hydraulic fluids. The A-2 grade has a 2-hour application life.
Application Properties (25 °C, 50% RH)
- Colour: Part A black, Part B white, mixed dark grey
- Mix ratio by weight: Part B : Part A = 10 : 1; base viscosity 22 Pa·s (220 P)
- Application life: 2 hours; tack-free time: <24 hours; cure to 35 Shore A: 36 hours
- Applied by brush or roller; non-volatile content 95% by weight
Performance Properties (cured 14 days at 25 °C)
- Hardness: 55 Shore A; mixed specific gravity 1.6
- Peel strength (dry, 100% cohesive): stainless steel 204 N/25 mm (46 pli), titanium 177 (40), epoxy primer 186 (42)
- After Type III fuel, 168 h at 60 °C: stainless steel 204 N/25 mm, titanium and epoxy primer 195 N/25 mm
- Tensile strength 3.38 MPa (522 psi); elongation 413%
Storage
- 3 months at 5–25 °C in original unopened containers (SP-J-513-M0020)
| Packing | 6 OZ / 100 ML or 500 ML |
| Specifications & Approvals | |
|---|---|
| NSN · P/N · CAGE |
8030-01-406-0446
· PR-1770 A-2
· CAGE 83574
|
| CAGE (Manufacturer) | 83574 |