This two-part fuel tank sealant is designed for aircraft applications, providing effective sealing for fuel tanks and fuselage. It features a low-sag, thixotropic paste that cures quickly, even in low temperatures and varying humidity. The sealant adheres well to common aircraft materials when properly primed.This two-part fuel tank sealant is designed for aircraft applications
Buy now from
Boeing Distribution (formerly Aviall)
This product has been replaced by new Part # PR1826B1-4=5N
PR-1826 Class B is a rapid cure, aircraft integral fuel tank sealant. This material is designed for fillet sealing of fuel tanks and other aircraft fuselage sealing applications. The cured sealant maintains excellent elastomeric properties after prolonged exposure to both jet fuel and aviation gas. PR-1826 Class B is a two-part, epoxy cured Permapol® P-3 polythioether compound. The uncured material is a low sag, thixotropic paste, suitable for application by extrusion gun or spatula. Unlike standard polysulfide fuel tank sealants, it can cure at low-temperatures and is unaffected by changes in relative humidity. This sealant has excellent adhesion to common aircraft substrates when correctly primed with PR-1826AP adhesion promoter.
Features & Benefits
Thermal rupture resistance for reliable performance
Low temperature flexibility at -65°F (-54°C) with no cracking, checking, or loss of adhesion
Corrosion resistance to protect against environmental factors
Resistance to hydrocarbons for enhanced durability
Flexibility with no cracks after bending 180 degrees over a 0.125 inch (3.18 mm) mandrel
Repairable to itself, excellent for both freshly cured and fuel-aged fillets
Outstanding resistance to water, alcohols, petroleum-based and synthetic lubricating oils, and petroleum-based hydraulic fluids
Fungus resistant and non-nutrient
Shaving and sanding without rolling or tearing
Specifications
Series: PR-1826
Container Size: 6 oz
Base Type: Petroleum
Form: Liquid (Part A), Solid (Part B)
Color: Black/White (Part A/B)
Composition: >=20 to <=50% Bis-[4-(2, 3-epoxipropoxi)phenyl]propane, >=20 to <=50% Phenol, Polymer with Formaldehyde, Glycidyl Ether (Mw<=700), >=20 to <=31% Calcium Carbonate, >=5 to <=10% Carbon Black, >=1 to <3% [3-(2, 3-epoxypropoxy)propyl]trimethoxysilane (Part A), >=10 to <=25% Calcium Carbonate, >=10 to <=25% Aluminum Hydroxide, >=1 to <=5% Titanium Dioxide, >=1 to <=5% Butanone, <=1% 2, 2'-thiodiethanethiol (Part B)
Application Time: 1/4 hr
Curing Time: 1-1/2 hr
Density: 11.35 lb/gal (Part A)
Specific Gravity: 1.47
Viscosity: >21 cSt
Tack-Free Time: 1 hr
VOC Content: 1 g/L
Application Method: Extrusion Gun and Spatula
Shelf Life: 274 Days
Storage Temperature: 60 to 80 deg F
Relative density: 1.36 lb/gal (Part A), 1.45 lb/gal (Part B)
Flash Point: 150 deg F
Boiling point: >100 deg F
Temperature Rating: -80 to 320 deg F
Suitable for Use With: Aircraft Integral Fuel Tank
Product information provided "as is", and Boeing may add, change, discontinue or remove product information at any time. Product photos may not be exact match to product delivered. Seeterms & conditions.
