DOWSIL Q4-2805 is a single component, non-curing, fuel and oil resistant fluorosilicone channel sealant
DOWSIL Q4-2805 is a single component, non-curing, fuel and oil resistant fluorosilicone channel sealant primarily used for aircraft fuel tanks. The innovative material provides good tack adhesive, is unaffected by shock, vibration and thermal cycling. It contains no catalyst or curing agent and the excellent flow characteristics provides faster injection at reduced pressures. DOWSIL Q4-2805 is also suitable for various sealing applications that require a non-curing sealant. This product meets MIL-S-85334(AS).
DOWSIL Sealant Q4-2805 is designed to be injected directly by air gun into grooves of integral fuel tank systems during fabrication or maintenance. The physical nature of the material is putty-like and it is white in color. Relative density at 25°C is 1.37 and extrusion force is 91 kg. This advance fluorosilicone channel sealant withstands immersion in fuels and exposure to fuel vapors in temperatures up to 200°C. It will also maintain its consistency over a wide temperature range from -55°C to +200°C.
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DOWSIL Q4-2805 Key Features:
- Good tack adhesion
- Easily injected and reinjected
- Contains flow-control particles
- Contains no catalyst of curing agent
- Maintains consistency over a wide temperature range from -55°C to 200°C
- Withstands immersion in fuels and exposure to fuel vapors in temperatures up to +200°C
Any high pressure sealant gun may be used when dispensing the product. DOWSIL Q4-2805 will be injected from the gun directly in the channel, port by port, so the channel is filled by each section. When injecting, the nozzle should be in direct contact with the port. There is no specific recommendation to the amount of pressure to move the sealant down the channel. If a leak needs to be repaired, it is strongly recommended to defuel the plane. A dry tank will promote adhesion. 7 day immersion at 80°C in Jet reference fuel swell 30%, JP-4 swell is 12% and JP-5 is 12%. 7 day immersion at 80°C, plus 24 hours dry at 90°C JP-4 weight loss is 1.0%. If you have any questions in regards to Dow Corning Q4-2805, contact Krayden and a technical representative will assist you.
Reading and understand the Dow Q4-2805 MSDS is strongly recommended before handling. When stored at or below 30°C in its unopened container it will have a usable life of 48 months from date of production. The material has not been tested nor deemed suitable for medical or pharmaceutical uses. Dow Corning offers the product in 213g containers, net weight. For more information on the handling or safety precautions, refer to the MSDS or contact Krayden, an authorized distributor of DOWSIL.
Dow Corning Q4-2805 Fluorosilicone Channel Sealant Typical Properties:
- White in Color
- Putty-like consistency
- Extrusion force is 91 kg
- Relative density at 25°C is 1.37
Dow is an innovator in manufacturing advance silicone adhesives, sealants and specialty chemicals. Countless hours of research and testing go into each state-of-the-art silicone products. DOWSIL Sealant Q4-2805 is a single component, non-curing, fuel and oil resistant fluorosilicone channel sealant. More product information can be found by visiting the DOWSIL Q4-2805 TDS or by contacting Krayden.