PPG PR1772B2-B1001 (100-ml-Semkit)

Additional Product Information

Overview

The PR-1772 Class B is a low-weight, two-part polysulfide sealant designed for aerospace and MRO applications. It provides exceptional adhesion, flexibility, and chemical resistance, making it ideal for fuselage and structural sealing tasks. Maintenance teams rely on it for rapid, reliable sealing solutions that perform under extreme temperatures and exposure to aviation fuels.

Key Technical Specs for PR-1772 Class B

• Type: Two-part chemically curing polysulfide sealant
• Size / Volume: Supplied in kits with Part A and Part B components
• Color: Part A Black, Part B Off White, Mixed Dark Brown
• Viscosity / Consistency: Low sag, thixotropic paste; Base viscosity 9,000 Poise (900 Pa s)
• Cure / Working Time: Tack-free in <8 hours, full cure 24 hours at 77 F (25 C), 50% RH
• Tensile / Peel Strength: Tensile 190 psi (1311 kPa) cured 14 days; Peel strength 35 38 pli (151 169 N/25 mm) depending on substrate
• Shore Hardness: Durometer A 45 (ultimate cure)
• Service Temperature: -65 F to 250 F (-54 C to 121 C), intermittent excursions up to 275 F (135 C)
• Typical Uses: Aircraft fuselage sealing, structural joints, fuel tank seams
• Shelf Life: At least 9 months when stored at 40 90 F (4 32 C) in unopened containers

Approvals & Specifications

• Boeing BMS 5-142 Class B
• MIL-C-5541 (Alodine aluminum)
• MIL-A-8625 Type I CAA (Anodized aluminum)
• AMS 5901 (Stainless steel)
• AMS-T-9046 (Titanium comp. B)
• BMS 5-89, BMS 10-11, BMS 10-20, BMS 10-60 (various primers/topcoats)
• AMS-QQ-A-250/12, AMS-QQ-A-250/13

Typical Aircraft MRO / AOG Applications

• Fuselage and structural sealing for commercial and military aircraft
• Fuel tank seams and integral fuel structures
• Aircraft joints requiring chemical and temperature resistance
• Repair and overhaul of existing sealant applications

Compatibility & Safety Notes

• Compatible substrates: Aluminum, anodized aluminum, stainless steel, titanium, epoxy primers, polyurethane topcoats
• Surface preparation: Clean with appropriate solvents, use lint-free cloth per AMS 3819
• PPE: Gloves and eye protection recommended; follow MSDS instructions
• Safe handling: Avoid ingestion, inhalation, and prolonged skin contact

Packaging & Procurement

• Supplied in two-part kits
• Storage: 40 90 F (4 32 C), unopened containers
• Application: Extrusion gun or spatula
• Easy-to-mix formula ensures minimal waste and consistent results

Why PR-1772 Class B is Chosen for AOG / MRO

• Rapid cure and tack-free performance accelerate turnaround times
• Lightweight formulation reduces aircraft weight without compromising performance
• High adhesion and flexibility reduce risk of sealant failure
• Versatile across multiple substrates and environmental conditions

Practical Suggestions for Your Team (AOG Mindset)

• Keep a stocked supply of PR-1772 Class B kits for emergency repairs
• Ensure proper training on mixing and surface prep for consistent results
• Use clean, lint-free cloths to prepare substrates and avoid contamination
• Store in temperature-controlled environments to preserve shelf life

Manufacture / Aviation Spec Codes

• Manufacturer: Bergdahl Associates, Inc.
• Product ID: PR-1772 Class B
• MIL / OEM Codes: BMS 5-142 Class B, MIL-C-5541, MIL-A-8625, AMS 5901, AMS-T-9046, BMS 5-89, BMS 10-11, BMS 10-20, BMS 10-60, AMS-QQ-A-250/12, AMS-QQ-A-250/13