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Dowsi Q4-2805 one-part non-curing fluorosilicone channel sealant designed
Basic Properties
Dowsil™ Q4-2805 is a one-part, non-curing fluorosilicone channel sealant designed for extreme fuel and oil environments. Its white putty-like compound is directly injected via air gun into grooves, providing durable sealing in aircraft fuel systems while meeting MIL-S-85334(AS) military specifications.
Property
Test Method
Unit
Value
Physical Properties
Physical Nature
–
–
Putty-like
Color
–
–
White
Density @25°C
ASTM D792
–
1.37
Extrusion Force
CTM
kg
91
Fuel Resistance
Jet Fuel Swell (7d@80°C)
CTM
%
30
JP-4 Swell (7d@80°C)
CTM
%
12
JP-5 Swell (7d@80°C)
CTM
%
12
Jet Fuel Weight Loss*
CTM
%
2.5
Adhesion
2024 Clad Aluminum
CTM
–
Excellent adhesion
Product Description
This sealant maintains consistent performance from -55°C to +200°C, withstanding prolonged immersion in jet fuels (e.g., JP-4, JP-5). Its flow-control particles enable rapid injection at reduced pressures, while slight swelling upon fuel exposure actively tightens seals – a critical feature for pressure fluctuations caused by aerodynamic heating in fuel tanks.
Characteristics
Industry-leading fuel resistance: 30% swell in Jet reference fuel (7 days @80°C), 12% swell in JP-4/JP-5 fuels, with ≤2.5% weight loss. Its non-curing formulation ensures long-term flexibility, resists shock/vibration/thermal cycling, and contains no catalyst. Exhibits excellent adhesion to 2024 clad aluminum (adhesive strength > cohesion strength).
Application Scenarios
Primarily used in military/commercial aircraft fuel tank channels (e.g., F-4, A-6A), applied via Grover No.223 gun with Semco adapter.
Supports emergency repairs without defueling.
Extended applications include racing fuel systems and chemical plant oil-resistant piping (Note: Industry-specific data for this exact product is not publicly documented; based on sector practices).
Specification
Product Name
Q4-2805
Brand
Dowsil
Specifications
212g/tube
type of shipping
Refrigerated transportation
FAQ
1.How can l get the price? -We usually quote within 24 hours after we get your inquiry(Except weekend and holidays)
-lf you are very urgent to get the price, please email us or contact us in other ways so that we can offer you a quote.
2. Can i buy samples placing orders?
-Yes.Please feel free to contact us.
3.What is your lead time? -It depends on the order quantity and the season you place the order.
-Usually we can ship within 7-15 days for small quantity, and about 30 days for large quantity.
4.What is your payment term? T/TWestern UnionMoneyGramand Paypal.This is negotiable
5.What is the shipping method? -It could be shipped by seaby air or by express(EMSUPSDHLTNT,FEDEX and ect)
Please confirm with us before placing orders.
6. How do you make our business long-term and good relationship? -1. We keep good quality and competitive price to ensure our customers benefit -2. We respect every customer as our friend and we sincerely do business and make friends with them,no matter where they come from.
Shenzhen Huazhisheng New Materials Technology Co., Ltd. is a leading provider of environmentally friendly adhesives and technical solutions, specializing in the application of modified silicone rubber, epoxy adhesives, thermal materials, bonding adhesives, encapsulation adhesives, and UV adhesives a... Shenzhen Huazhisheng New Materials Technology Co., Ltd. is a leading provider of environmentally friendly adhesives and technical solutions, specializing in the application of modified silicone rubber, epoxy adhesives, thermal materials, bonding adhesives, encapsulation adhesives, and UV adhesives a...
