This rapid curing sealant is designed for aircraft fuel tanks and fuselage applications, with a service temperature range of -80 to 320°F. It features excellent adhesion to aircraft substrates, low sag properties, and can cure at low temperatures, making it suitable for various environmental conditions.
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WARNING: This product can expose you to chemicals including CARBON BLACK (AIRBORNE, UNBOUND PARTICLES OF RESPIRABLE SIZE [= 10 MICROMETERS]) and TITANIUM DIOXIDE (AIRBORNE, UNBOUND PARTICLES OF RESPIRABLE SIZE) which is [are] known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
Overview
PR-1826 Class B is a rapid cure, aircraft integral fuel tank sealant. It as a service temperature range from -80 to 320 deg F, with intermittent excursions up to 420 deg F. 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: 2.5 oz
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), >=20 to <=34% Calcium Carbonate, >=10 to <=20% Aluminum Hydroxide, >=1 to <=5% Titanium Dioxide, >=1 to <=5% Butanone, <1% 2, 2'-Thiodiethanethiol (Part B)
Curing Time: 7 Days
Specific Gravity: 1.36 (Part A), 1.45 (Part B)
Viscosity: >21 cSt (Part A)
VOC Content: 1 g/L (Part A), 22 g/L (Part B)
Shelf Life: 9 Months
Tensile Strength: 350 psi
Flash Point: 65.56 deg C (Part B)
Boiling point: >37.78 deg C (Part A)
Mixing Ratio: 8.5:100
Application Time: 1/2 hr
Domestic/Import: Domestic
Technical Information
AMS 3277 - Type 1 Class B-1/2, -1/4, -2 Grade 1, FMS-3055 - Class B-1/2, -2 LOCKHEED MARTIN, MS-3064 - FORM I Class B-1/2, -1/4, -2 LOCKHEED - FORT WORTH
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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.
