PRC-DESOTO PR 1775
Harmonization Code : 3506.10.00.00 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg
Main features
- Non-Chromate Corrosion Barrier
- Selectable Class B Work Life
- Fuel-Exposed Elastomeric Seal
Product Description
PPG PR-1775 Class B Non-Chromate Corrosion-Inhibitive Sealant is a two-part, manganese-dioxide-cured polysulfide sealant for corrosion-barrier sealing of aluminum alloys and dissimilar-metal aerospace joints. The uncured material is a low-sag, thixotropic paste applied by extrusion gun or spatula and cured at room temperature. Class B-1/2 and B-2 variants provide 0.5- and 2-hour application lives at 25 deg C and 50% RH. The cured sealant has a typical Shore A hardness of 51, 420% elongation, and a service range from -54 to 121 deg C, with recurring short exposures to 182 deg C. It retains elastomeric properties after exposure to jet fuel and aviation gasoline.
Key features
- Non-chromate corrosion barrier: The sealant forms a corrosion-inhibitive barrier on aluminum alloys and between dissimilar metals.
- Selectable Class B work life: B-1/2 and B-2 grades provide 0.5- and 2-hour application lives at 25 deg C and 50% RH.
- Fuel-exposed elastomeric seal: The cured material retains elastomeric properties after exposure to jet fuel and aviation gasoline.
Applications / Suitable for
- Corrosion-barrier sealing of aluminum aerospace assemblies.
- Sealing between dissimilar metals in aerospace assemblies.
- Aerospace joints exposed to jet fuel or aviation gasoline.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Other Properties
Mechanical Properties
Additional Information
As supplied / before processing
Class B-1/2 and B-2 values are typical at 25 deg C and 50% RH.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Part A / Part B color | Black / White | - | As supplied |
| Mixed color | Gray | - | After mixing |
| Mix ratio by weight | 12:100 / 10:100 | - | B-1/2 / B-2; Part A to Part B |
| Base viscosity | 11,000 (1,100) | Poise (Pa-s) | Brookfield #7 at 2 rpm |
| Application life | 0.5 / 2 | h | B-1/2 / B-2 at 25 deg C, 50% RH |
| Tack-free time | <4 / <6 | h | B-1/2 / B-2 at 25 deg C, 50% RH |
| Cure to 30 Shore A | 16 / 24 | h | B-1/2 / B-2 at 25 deg C, 50% RH |
After processing / final state
Values are typical after 14 days at 25 deg C and 50% RH unless otherwise stated.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Cured specific gravity | 1.59 | - | Cured 14 days at 25 deg C, 50% RH |
| Nonvolatile content | 94 | % | Typical cured material |
| Ultimate cure hardness | 51 | Shore A | Cured 14 days at 25 deg C, 50% RH |
| Tensile strength | 495 (3,413) | psi (kPa) | Cured 14 days at 25 deg C, 50% RH |
| Elongation | 420 | % | Cured 14 days at 25 deg C, 50% RH |
| Low-temperature flexibility | No cracking | - | At -54 deg C |
| Service temperature range | -54 to 121 | deg C | Short recurring exposures up to 182 deg C |
