PPG PR1772B1-B1001 (100-ml-Semkit)

Additional Product Information

Overview

A low-weight, two-part polysulfide aircraft sealant designed for fuselage and fuel-resistant sealing applications in aviation and MRO environments. This sealant cures at room temperature to form a resilient, elastomeric seal that maintains adhesion and flexibility after exposure to jet fuel, aviation gasoline, saltwater, and harsh environmental conditions. Maintenance teams rely on this material for weight reduction, long-term durability, and dependable sealing performance in critical aircraft structures.

Key Technical Specs for PR-1772 Class B

• Type: Two-part chemically curing polysulfide sealant
• Size/Volume: Supplied as a two-part kit (various aerospace packaging formats)
• Color: Part A Black; Part B Off-white; Mixed Dark Brown
• Consistency: Low-sag, thixotropic paste suitable for extrusion gun or spatula
• Mix Ratio (by weight): 10:100 (Part A : Part B)
• Application Life: 2 hours at 77 F (25 C)
• Tack-Free Time: < 8 hours
• Full Cure: 24 hours to functional hardness at 77 F (25 C)
• Tensile Strength: 190 psi (1311 kPa) cured; 220 psi (1518 kPa) after fuel immersion
• Peel Strength: Up to 38 pli (169 N/25 mm) depending on substrate
• Ultimate Hardness: Shore A 45
• Elongation: Up to 280%
• Service Temperature: 65 F to 250 F ( 54 C to 121 C), intermittent to 275 F (135 C)
• Typical Uses: Aircraft fuselage sealing, fuel-resistant sealing, structural seam sealing
• Shelf Life: Minimum 9 months at 40 F 90 F (4 C 32 C) unopened

Approvals & Specifications

• Boeing BMS 5-142 Class B testing compliance
• Compatible with MIL-C-5541 (Alodine aluminum)
• Compatible with MIL-A-8625 Type I CAA (Anodized aluminum)
• Compatible with AMS 5901 (Stainless steel)
• Compatible with AMS-T-9046 (Titanium)
• Tested with BMS epoxy primers and polyurethane topcoats
• Corrosion resistance verified in AMS 2629 JRF immersion

Typical Aircraft MRO / AOG Applications

• Aircraft fuselage sealing and structural joints
• Fuel tank sealing and repair
• Seam sealing in aluminum, titanium, and stainless steel structures
• Corrosion-resistant sealing in high-exposure areas
• Maintenance, repair, and overhaul (MRO) operations

Compatibility & Safety Notes

• Adheres to aluminum, titanium, stainless steel, epoxy primers, and polyurethane topcoats
• Surface must be cleaned with approved solvents prior to application
• Use lint-free cloths conforming to AMS 3819
• Follow MSDS guidance and use appropriate PPE during handling
• For industrial and professional aerospace use only

Packaging & Procurement

• Supplied in convenient two-part kits for accurate mixing
• Designed for extrusion gun or spatula application
• Store unopened containers at 40 F 90 F (4 C 32 C)
• Available through authorized aerospace distributors

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

• Up to 30% weight savings compared to traditional sealants
• Excellent resistance to fuels, hydrocarbons, and corrosion
• Fast room-temperature curing for reduced downtime
• Flexible and repairable after curing or fuel exposure
• Reliable adhesion across multiple aircraft substrates

Practical Suggestions for Your Team (AOG Mindset)

• Stock two-part kits for rapid deployment during unscheduled maintenance
• Train technicians on proper surface preparation and mixing procedures
• Maintain solvent cleaning supplies and lint-free cloths in sealant kits
• Rotate inventory to ensure use within shelf life

Manufacture / Aviation Spec Codes

• Product ID: PR-1772 Class B
• Specification Reference: Boeing BMS 5-142 Class B
• Authorized Distributor: Bergdahl Associates, Inc.
• Application Category: Low-weight fuselage sealant