PRC-DESOTO PR 870B1/2
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
- Class B-1/2 Processing Window
- Corrosion-Inhibitive Dissimilar-Metal Seal
- High-Elongation Cured Seal
Product Description
PPG P/S 870 Class B-1/2 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 Class B-1/2 grade is a low-sag, thixotropic paste applied by extrusion gun or spatula and cured at room temperature. At 25 deg C and 50% RH, it provides a typical 0.5-hour application life, less than 4 hours to tack-free, and 9 hours to 30 Shore A hardness. The cured material has a typical Shore A hardness of 50, 358 psi tensile strength, and 400% elongation. Its service range is -54 to 121 deg C, with intermittent excursions to 135 deg C.
Key features
- Class B-1/2 processing: A 0.5-hour application life is paired with less than 4 hours to tack-free at 25 deg C and 50% RH.
- Corrosion-inhibitive joint seal: The polysulfide sealant forms a barrier on aluminum alloys and between dissimilar metals.
- High-elongation cured seal: Typical cured elongation is 400% with 358 psi tensile strength.
Applications / Suitable for
- Corrosion-barrier sealing of aluminum aerospace assemblies.
- Sealing between dissimilar metals in aerospace assemblies.
- Aerospace joints exposed to fuels and oils.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Mechanical Properties
Additional Information
As supplied / before processing
Values apply to the Class B-1/2 grade unless otherwise stated.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Part A / Part B color | Black / White | - | As supplied |
| Mixed color | Gray | - | After mixing |
| Mix ratio by weight | 17:100 | - | Part A to Part B |
| Base viscosity | 11,000 (1,100) | Poise (Pa-s) | Brookfield #7 at 2 rpm |
| Application life | 0.5 | h | Class B-1/2 at 25 deg C, 50% RH |
| Tack-free time | <4 | h | Class B-1/2 at 25 deg C, 50% RH |
| Cure to 30 Shore A | 9 | h | Class B-1/2 at 25 deg C, 50% RH |
| Storage life | At least 9 | months | Below 27 deg C in original unopened containers |
After processing / final state
Values are typical and apply to the stated cure and test conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Cured specific gravity | 1.48 | - | Cured 14 days at 25 deg C, 50% RH |
| Nonvolatile content | 95 | % | Typical cured material |
| Ultimate cure hardness | 50 | Shore A | Cured 14 days at 25 deg C, 50% RH |
| Tensile strength | 358 (2,470) | psi (kPa) | Cured 14 days at 25 deg C, 50% RH |
| Elongation | 400 | % | 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 | Intermittent excursions up to 135 deg C |
