Another product option:
TECHNICAL DATA
PR-1425 Class B Windshield And Canopy Sealant
Description
PR-1425 Class B is an aircraft windshield and canopy sealant. It has a service temperature range from -65°F (-54°C) to 250°F (121°C), with intermittent excursions up to 275°F (135°C). This material is designed for fillet sealing of properly prepared glass, polycarbonate, acrylic and other aircraft sealing appli- cations. This product is specifically formulated not to craze substrates. The cured sealant exhibits excellent resistance to UV and weather exposure.
PR-1425 Class B is a two-part, dichromate cured poly- sulfide compound. The uncured material is a low sag, thixotropic paste, suitable for application by extrusion gun or spatula. This sealant has excellent adhesion to common aircraft substrates.
The following tests are in accordance with PRC- DeSoto International and other OEM specification test methods.
Application Properties (Typical)
Performance Properties (Typical)
Cured 7 days @ 77°F (25°C), 50% RH
Cured specific gravity 1.49
Nonvolatile content, % 93
Ultimate cure hardness,
Durometer A 55
Peel strength, pli (N/25 mm), 100% cohesion Dry, 14 days at 77°F (25°C)
Color Part A
Part B Mixed
Mixing ratio By weight
Base viscosity
(Brookfield #7 @ 2 rpm), Poise (Pa-s)
Black Black Black
Part A
art B 10:100
16,000 (1600)
*Primed with PR-142 Adhesion Promoter
Thermal rupture resistance - Retains pressure of 10 psi with only negligible deformation, both before and after immersion in JRF.
Low temperature flexibility @ -65°F (-54°C) - No cracking, checking or loss of adhesion.
Corrosion resistance - No corrosion, adhesion loss, softening, or blistering after 20-day immersion in 2- layer salt water/JRF @ 140°F (60°C).
Resistance to fluids - Excellent resistance to water, alcohols, petroleum-base and synthetic lubricating oils, and petroleum-base hydraulic fluids.
Flexibility - No cracks after bending 180 degrees over 0.125 inch (3.18 mm) mandrel.
Repairability to itself - Excellent to both freshly cured as well as fuel aged and abraded fillets.
Fungus resistance Non-nutrient
Note: The application and performance property val- ues above are typical for the material, but not intend- ed for use in specifications or for acceptance inspec- tion criteria because of variations in testing methods, conditions and configurations.
Slump, inches (mm) Initial
B-1/2 0.20 (5.08)
B-1 0.15 (3.81)
B-2 0.20 (5.08)
50 Minutes 90 Minutes —— ——
—— ——
0.25 (6.35) 0.25 (6.35)
MIL-G-25667 (Glass)
MIL-P-8184 (Acrylic)* MIL-P-83310 (Polycarbonate)* MIL-S-5059 (Stainless steel)* AMS-T-9046 (Titanium comp. C)* AMS-QQ-A-250/12 (Aluminum)
50 (222) 48 (214) 46 (205) 46 (205) 46 (205) 46 (205)
Application life and cure time @ 77°F (25°C), 50% RH
Cure time
Application Tack free
life time Durometer (hours) (hours) (hours)
B-1/2 1/2 <8
B-1 1 <24
B-2 2 <24
24 48 48
to 30 A
Where Smart Solutions Take Flight®