PPG Aerospace/PRC DeSoto® 654 Semkit Sealant PS890A2-60Z

This aircraft integral fuel tank sealant is suitable for brush and fay sealing applications. It operates effectively within a temperature range of -65°F to 250°F, with short-term exposure up to 275°F. The cured sealant retains excellent elastomeric properties even after extended contact with jet fuel and aviation gas.

WARNING: This product can expose you to chemicals including CARBON BLACK (AIRBORNE, UNBOUND PARTICLES OF RESPIRABLE SIZE [= 10 MICROMETERS]), TITANIUM DIOXIDE (AIRBORNE, UNBOUND PARTICLES OF RESPIRABLE SIZE) and TOLUENE, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov.

Overview

P/S 890 Class A is an aircraft integral fuel tank 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 brush and fay 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.

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 with no loss of adhesion or softening after immersion in salt water
• 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 and suitable for both freshly cured and fuel-aged fillets
• Outstanding resistance to water, alcohols, petroleum-based and synthetic lubricating oils
• Resistance to petroleum-based hydraulic fluids
• Fungus resistant and non-nutrient

Specifications

• Color: Part A – Black, Part B – White, Mixed – Gray
• Mixing Ratio by Weight: Part A : Part B – 10:100
• Base Viscosity: 250 (25) (Brookfield #6 @ 10 rpm), Poise (Pa-s)
• Application Life: 2 hours @ 77°F (25°C), 50% RH
• Cure Time: 14 days @ 77°F (25°C), 50% RH
• Cured Specific Gravity: 1.55
• Nonvolatile Content: 85%
• Tensile Strength: 350 psi (2413 kPa) – Standard cure, 14 days @ 77°F (25°C), 50% RH
• Elongation: 250% – Standard cure, 14 days @ 77°F (25°C), 50% RH