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DOWSIL™ Q4-2805 Fluorosilicone Sealant 212gm Cartridge (Large End)

Silmid P/N: DC42085075
£255.21 (excl VAT) £306.25 (Inc VAT)
No stock - lead time 94 days
Please order in multiples of 12
Bulk discounts
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Dowsil Q4-2802 Fluorosilicone channel sealant is a one part, fuel and oil-resistant compound.

Technical Information

  • Commodity Code 32149000
  • Country of Origin United States

Product Properties

Pack Size
212gm Cartridge
Product Colour
Manufacturer Name
Dow Chemical Company
Also Known As
Dow Corning Q4-2805 Fluorosilicone Sealant 212gm Cartridge (Large End)

Product Information

Primarily used as groove injection sealants for aircraft fuel tanks. Also suitable for various sealing applications that require a non-curing sealant. The sealant is injected directly by air gun into the grooves of integral fuel tank systems during fabrication or maintenance.

Upon exposure to common fuels, this sealant will swell slightly, tightening the seal during service. This characteristic is especially beneficial when, as a result of aerodynamic heating, expansion of fuel and fuel vapours may cause internal tank pressure.


  • Superior sealing characteristics under exposure to fuels and oils
  • Easily injected and reinjected
  • Maintains consistency over wide temperature range from -55°C to +200°C
  • Non-curing
  • Good tack adhesion
  • Essentially unaffected by shock, vibration and thermal cycling
  • Contains no catalyst or curing agent Withstands immersion in fuels and exposure to fuel vapours in temperatures up to +200°C
  • Contains flow-control particles
  • Excellent flow characteristics provide faster injection at reduced pressures


  • Meets MIL-S-85334(AS)

Please note this product was previously known as Dow Corning.

Shipping information

Orders over £100 placed online will now qualify for FREE UK Mainland delivery*

Orders under £100 placed online for UK Mainland delivery is £12.00*

**Orders requiring Pre 10.00am Next Day delivery has also been lowered from £35.00 to £30.00, orders placed through the office will incur additional charges.** 

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.