PPG PR 2007 B 1/2 (1-ea-654)

PR-2007 Class B Lightweight Aircraft Fuel Tank Sealant

Overview

PR-2007 Class B is a lightweight, fast-curing, two-component polysulfide aircraft fuel tank sealant developed for integral fuel tanks, fillet sealing and aircraft fuselage sealing applications. Offering approximately 30% weight savings compared with conventional fuel tank sealants, it cures at room temperature to form a resilient, highly flexible seal with excellent adhesion to common aerospace substrates. The cured sealant provides long-term resistance to jet fuel, aviation gasoline and limited exposure to phosphate ester hydraulic fluids, making it ideal for both OEM production and MRO fuel tank repairs.

Key Technical Specs

• Product Type: Two-component lightweight polysulfide fuel tank sealant
• Product Name: PR-2007 Class B
• Curing System: Manganese dioxide cured polysulfide
• Appearance: Low-sag thixotropic paste
• Cured Specific Gravity: 1.1
• Non-Volatile Content: 97%
• Ultimate Hardness: 45 Shore A
• Service Temperature: -54°C to +121°C
• Intermittent Temperature Limit: 182°C
• Base Viscosity: Approximately 10,000 poise (Brookfield #7 @ 2 rpm)

Approvals & Specifications

• Qualified to AMS 3281 Type II
• Performance testing conducted to AMS 2629
• Compatible with aircraft substrates prepared to MIL-C-5541, AMS 2471, AMS 5516 and AMS 4911
• Surface preparation guidance references SAE AIR 4069

Performance Highlights

• Approximately 30% lighter than traditional aircraft fuel tank sealants
• Excellent resistance to jet fuel and aviation gasoline
• Resists limited exposure to phosphate ester hydraulic fluids
• Excellent adhesion to aluminium, stainless steel, titanium and composite substrates
• High flexibility with 418% elongation after standard cure
• Excellent repairability to freshly cured and fuel-aged sealant
• Can be shaved and sanded without tearing or rolling
• Outstanding resistance to water, alcohols, lubricating oils and petroleum-based hydraulic fluids

Typical Applications

• Aircraft integral fuel tanks
• Fuel tank fillet sealing
• Aircraft fuselage sealing
• Aerospace structural sealing applications
• Fuel tank maintenance and overhaul (MRO)
• OEM aircraft fuel system assembly

Compatibility & Safety Notes

• Suitable for aluminium, stainless steel, titanium and composite aircraft substrates
• Surfaces should be thoroughly cleaned with approved solvents immediately before application
• Use clean lint-free cloths conforming to AMS 3819 during surface preparation
• Adhesion testing on production substrates is recommended before large-scale application
• Refer to the Safety Data Sheet (SDS) before handling
• For industrial use only

Application & Curing

• Application Method: Extrusion gun or spatula
• Class B-1/2 Mix Ratio (Weight): 12 parts Part A to 100 parts Part B
• Class B-2 Mix Ratio (Weight): 10 parts Part A to 100 parts Part B
• Class B-1/2 Application Life: 30 minutes
• Class B-2 Application Life: 2 hours
• Class B-1/2 Tack-Free Time: 4 hours
• Class B-2 Tack-Free Time: Less than 6 hours
• Class B-1/2 Cure to 35 Shore A: 6 hours
• Class B-2 Cure to 35 Shore A: 8 hours
• Cures at room temperature to a resilient elastomeric seal

Packaging & Procurement

• Available in two-part Semkit® packages
• Available as pre-mixed frozen cartridges
• Semkit® shelf life: Minimum 9 months below 27°C
• Pre-mixed frozen shelf life: 28 days at -40°C or below

Why This Product is Chosen for AOG / MRO

• Lightweight formulation helps reduce aircraft operating weight
• Excellent long-term fuel resistance for aircraft fuel systems
• Fast curing minimises maintenance downtime
• Outstanding adhesion to common aerospace substrates
• Easy repairability simplifies ongoing fuel tank maintenance

Practical Suggestions for Your Team

• Always clean substrates immediately before sealant application.
• Use fresh lint-free cloths and approved solvents during surface preparation.
• Determine adhesion on production substrates before commencing large-scale sealing operations.
• Observe the appropriate application life for the selected Class B grade.
• Store Semkit® packages below 27°C to maximise shelf life.

Manufacturer / Aviation Spec Codes

• Product Name: PR-2007 Class B
• Manufacturer: PPG Aerospace (PRC-DeSoto)
• Product Type: Lightweight aircraft fuel tank sealant
• Technology: Two-component manganese dioxide cured polysulfide
• Primary Application: Aircraft integral fuel tank and fuselage sealing
• Specification: AMS 3281 Type II