PR-1772 Class B is a low weight sealant. It has a service temperature range -65°F (-54°C) to 250°F (121°C), with intermittent excursions up to 275°F (135°C).
It offers as much as a thirty 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.
