This rapid curing sealant is designed for aircraft fuel tanks, offering a service temperature range from -80 to 320°F, with intermittent use up to 420°F. It features excellent adhesion to aircraft substrates, low sag properties, and is effective in low temperatures and varying humidity, making it suitable for various sealing applications.
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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.
Specifications
Series: PR-1826
Container Size: 6 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 <=35% 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), 33 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: 1/4 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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DISCLAIMER: Product information provided “as is.” Boeing may add, change, discontinue or remove this information at any time. Product photos may not be exact match to product delivered. Seeterms & conditions.
