Features of Pro-Seal 875
Extrusion grade - Low specific
gravity - Low sag - 3-7% soluble chromates -
Fillet sealing
P/S 875 Class B is a low weight corrosion inhibitive
sealant. It has a service temperature range from -65°F (-54°C) to 250°F (121°C), with
intermittent excursions up to 275°F (135°C). This material acts as an effective barrier
against the common causes of corrosion on aluminum alloys or between dissimilar metals. It
offers as much as a twenty percent weight savings, per unit volume, over traditional
sealants used for these purposes The cured sealant maintains excellent elastomeric
properties after limited exposure to both jet fuel and aviation gas.
P/S 875 Class B is a two part, chemically curing,
Permapol® P-5 polysulfide compound. The uncured material is a low sag, thixotropic paste
suitable for application by extrusion gun or spatula. It cures at room temperature to form
a resilient sealant having excellent adhesion to common aircraft substrates.
OEM specification: BMS 5-142, STM 40-107
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