Usage

Typical Sealant Applications

Sealant Basics

Sealant Basics: Classes

Class A - Brush
Viscosity 150-500 P (chocolate syrup)
Brush sealing fasteners

Class B – Extrusion
Viscosity 9,000-14,000 P (peanut butter)
Low flow/sag applications
Fillet and butt joint sealing

Class C – Roller
Viscosity 1,500-4,000 P (mayonnaise)
Fay surface & wet installed fastener sealing

Class A (Typical for fuel tanks)

Class B (Typical for fuel tanks)

Class C (Typical for fuel tanks)

Sealant Application Jargon
Application Time (AT)
    Time to apply @ 77ºF

Assembly Time/Squeeze-out
    Time to clamp up parts

Tack Free Time (TFT)
    “Chip Free”
    Polyethylene film releases

Cure Rate
    Fly-away time/service cure ~ 30-35A