As of April 4, 2020, we have fresh material and are shipping domestically and internationally.


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Dapco 18-4F

Dapco 18-4F: Firewall Sealant

Dapco 18-4F from D Aircraft is a two-component, firewall sealant intended for use as a coating, sealant or filleting material in the construction, repair and maintenance of aircraft and is especially useful where fire resistance, exposure to phosphate ester fluids, and/or exposure to extreme temperatures -65°F (-54°C) to 400°F (204°C) are major considerations.

The sealant adheres well to a variety of substrates when primed with Dapco 1-100. Learn more below or get a quote today.


Meets requirements of specification:  BMS 5-63 TY 1 B4

Packaging: Available in pints, quarts and gallons.

Technical Data:  *
  • Cure Profile:
  • Application Life (hrs): 4
  • Tack Free Time (hrs): 24
  • Cure Time (hrs): <7
Shelf Life: 12 Months | Consistency: Paste | Color: Dark Green

*Please consult the technical data sheet for specificities of environmental conditions that yielded the above data. Standard cure rates are based on industry curing standards. 
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Technical Data Sheets (TDS)

Safety Data Sheet (SDS)

NSL Product Guides

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