DAPCO® 18-4F Silicone Firewall Sealant
Made for use during aircraft construction, repair and maintenance, Cytec DAPCO® 18-4F silicone firewall sealant can be used for filleting, coating and sealing materials. This firewall sealant is made up of a two-part, solvent-free silicone compound. The uncured product is a thixotropic paste that can be applied using a spatula or an extrusion gun. DAPCO® 18-4F is free of lead, fire-retardant and resistant to weathering and harsh conditions. It also protects your aircraft with its resistance to most chemicals that are common to the aerospace industry and immunity to phosphate ester fluids. In addition to being repairable, this sealant provides excellent performance at extreme temperatures. It can withstand low temperatures down to -65 degrees Fahrenheit and high temperatures up to 400 degrees Fahrenheit.
Features
- Two-component, solvent-free, thixotropic silicone paste
- Free of lead
- Fire-retardant
- Resistant to weathering
- Great performance at low operating temperatures
- Resistant to chemicals common to aerospace industry
- Repairable
- Immune to phosphate ester fluids
- Temperature rating: -65 degrees Fahrenheit to 400 degrees Fahrenheit
- Adhesive to a variety of substrates when primed with DAPCO 1-100
- Compatible with DAPCO 2100
- Color: Part A - dark green, Part B - blue, Mixed - dark green
- Solids: 100 percent
- Consistency: Thixotropic paste, when mixed
- Density: 12.2 pounds per gallon, when mixed
- Shelf life at 77 degrees Fahrenheit: 12 months
Specifications
Typical properties
| PART A | PART B | MIXED |
| Color: | Dark Green | Blue | Dark Green |
| Solids, %: | 100 | 100 | 100 |
| Consistency: | Thixotropic Paste | Viscous Liquid | Thixotropic Paste |
| Density, lb./gal: | 12.5 | 9.0 | 12.2 |
| Shelf Life at 77°F: | 12 months | 12 months | |
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