Country of Origin
United States
Shipping Weight
0.75 pounds
Manufacturer P/N
PR-1776M B-2
Schedule B Code
3214.10.0010
Ship Dimensions
18 x 5 x 2 inches
This 6 oz SemKit of PPG Aerospace PRC-Desoto PR-1776M Class B is a low density, high temperature aircraft integral fuel tank sealant with a 2 hour application life. It has a service temperature range from -65°F (-54°C) to 250°F (121°C), with very limited excursions up to 360°F (182°C). This material is designed for fillet sealing of fuel tanks and other aircraft fuselage sealing applications. 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 prolonged exposure to aircraft fuels both jet fuel and aviation gas, and will resist limited contact to diphosphate ester based hydraulic fluids.
PR-1776M Class B is a two-part, manganese dioxide cured Permapol® P-5 modified polysulfide. 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.
PR-1776M Class B is designed to be a direct replacement for PR-1776 Class B.
Approvals/References/Specification
Boeing Specification: BMS 5-45 CL B2
Application Properties (typical) | | Color | Part A - Black Part B - Off White Mixed - Dark Brown | Mixing ratio | Part A:Part B - 10:100 | Base Viscosity | (Brookfield #7 @ 2 rpm), Poise (Pa-s) - 11000(1100) | Application Life and Cure Time (B-2) @77° F (25°C), 50% RH | Application life - 2 hour Tack free time - < 16 hours Cure time to 30 A Durometer - < 24 hours | |
For specific details, application data, and more about PRC-Desoto PR-1776MB-2 Class B Low Weight Fuel Tank Sealant please download and view this PDF, click here.
Safety Data Sheet