PPG PR-1771 Class B is a non-chromate, low density, corrosion inhibitive sealant. Service temperature is −54 to 121 °C, with intermittent excursions up to 135 °C. It is designed for fuselage applications such as exterior butt joints and aerodynamic smoothing, where a flexible elastomeric seal is needed to keep out moisture; it offers up to 40% weight savings over traditional sealants. It is a two-part, manganese dioxide cured Permapol® P-5 modified polysulfide that resists aircraft fuels, petroleum based oils and intermittent contact with diphosphate ester hydraulic fluids.
Application Properties (B-2)
- Colour: A black, B beige, mixed black; mix ratio by weight 10:100
- Base viscosity 1100 Pa·s (11,000 P); slump 2 mm
- At 23 °C application life 2 hours; tack free 16 hours; 30 Shore A in 24 hours
Performance
- Specific gravity 1.14; non-volatile content 92.5%; hardness 45 Shore A
- Peel (aluminium, stainless steel, titanium, PAC 33, PU 66) 4.2–7.3 N/mm, 100% cohesive
- Tensile strength 1.28 MPa; elongation 395%; weight loss 3.3%
- No corrosion in salt spray and galvanic cell tests
Storage
- 6 months at 4–27 °C in unopened containers
| Packing | 6 OZ / 100 ML |