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Dapco 18-4F Silicone Firewall Sealant 1USP Kit *BMS5-63 Revision N Form K Class B4 Type I

Dapco 18-4F Silicone Firewall Sealant 1USP Kit *BMS5-63 Revision N Form K Class B4 Type I
DAPCO 18-4F is a two component, solvent-free, thixotropic silicone paste.
£338.97 excl VAT
£406.76 inc VAT
No stock - lead time 17 days
Bulk discounts
£338.97 + VAT
£322.02 + VAT
£313.55 + VAT
£305.07 + VAT


DAPCO 1804F is a two-component, solvent-free, thixotropic silicone paste. DAPCO 18-4F is most commonly used as a coating, sealant, or filleting material in the construction, repair and maintenance of all types of aircraft. The product can be applied using a variety of methods and is espcially useful where fire resitance, exposure to phosphate ester fluids, and/or exposer to extreme temperatures -65°F (-54°C) to 400°F (204°C) are major considerations.


  • Qualified to Boeing BMS 5-63
  • Compatible with DAPCO 2100
  • Lead frree
  • Good adhesion to a variety of substrates when primed with DAPCO 1-100
  • Excellent retardency
  • Weatherability
  • Performance at low operating temperatures
  • Good resistance to chemicals commonly used in aerospace applications
  • Repairability

Orders over £50 placed online will now qualify for FREE UK Mainland delivery*

Orders under £50 placed online for UK Mainland delivery is £6.95*

Orders requiring Pre 10.00am Next Day delivery has also been lowered from £35.00 to £19.50** 

International delivery (door to door delivery) is available for selected countries worldwide. Shipping will be automatically calculated based on the weight, location and hazardous nature of the goods. Customers can also choose ex works to arrange their own collection.
Please refer to our delivery page for more information.

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Sil-Mid Limited DO NOT GUARANTEE that the information on this page is the most up to date information available from the manufacturer, there are times when updated information is released and we are not made aware immediately.