PR-705 is a non-curing fuel tank channel sealant. It has a service temperature range from -65°F (-54°C) to 220°F (104°C). The material is designed for sealing aircraft fuel tanks utilizing a channel/groove design with gaps up to 5 mils wide. The material offers excellent resistance to water and hydrocarbon aircraft fuels like JP-4 or JP-8.
PR-705 is a one-part polysulfide compound. The material is a heavy, putty-like compound suitable for application by a high-pressure injection gun. The following tests follow MIL-S-85334 (AS) specification test methods.
PR-705 exhibits positive adhesion to most metal and coated metal surfaces. Therefore, substrates should be cleaned with solvents to remove contamination such as dirt, grease, or other processing lubricants.
PR-705 is supplied in 6 oz. Semco® cartridges. Maximum pressure of 2800 lbs (12,455 Newtons) is used at an air pressure of approximately 40 psi (276 K-Pa) using a model 223 Grover-Smith injection gun with a Semco® cartridge adapter kit #226358. This material is compatible with polyfluoro and polycyanosiloxane-based channel sealants and polysulfides.
Technical Data Sheet for PR-705 (pdf)
PR-705 comes in the following packaged configuration:
- 4-1/2 fl. oz. of Sealant in a 6 oz. Cartridge
- Other packaging configurations may be available.
Specification information provided for reference purpose only. Review specification QPL for verification or consult with engineering services.