DOWSIL 94-003
Harmonization Code : 3909.20.00.90 | Amino-resins, phenolic resins and polyurethanes, in primary forms : Melamine resins : Other
Main features
- One-Part Moisture-Cure Adhesive
- Fuel, Oil, and Moisture Resistance
- Brush, Dip, or Spray Application
Product Description
DOWSIL™ 94-003 Dispersion Coating is a one-part, solvent-borne fluorosilicone elastomer coating supplied as 50% solids in methyl ethyl ketone. It cures at room temperature through atmospheric moisture to form a flexible rubber coating. The material is designed to protect substrates and parts, including silicone rubber insulation and ducting, from solvents, fuels and oils, and it has also been used for corrosion control in integral fuel tanks. The cured coating is described as flexible from -65°C to +260°C and resistant to weathering, moisture and ozone. It can be brushed or dipped as supplied, or thinned with methyl ethyl ketone for spray application. Primer-based surface preparation is documented for stronger and more uniform adhesion on metal and plastic surfaces.
Key features
- Fuel and oil exposure resistance: Retains properties and good bond strength when exposed to oils and fuels.
- Flexible moisture-cured elastomer: Cures at room temperature to a flexible rubber and is described as flexible from -65°C to +260°C.
- Flexible application options: Can be brushed or dipped as supplied, or thinned with methyl ethyl ketone for spray application.
Applications / Suitable for
- Protective coating for silicone rubber insulation exposed to solvents, fuels and oils
- Protective coating for ducting and other parts exposed to solvents, fuels and oils
- Corrosion-control coating for integral fuel tanks
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Additional Information
DOWSIL™ 94-003 Dispersion Coating
DOWSIL™ 94-003 Dispersion Coating is a one-part fluorosilicone elastomer coating supplied as a solvent-borne dispersion. It moisture-cures at room temperature to a flexible rubber film for protecting parts from fuels, oils and solvents. The product supports brush, dip and spray application and is documented for silicone rubber parts and corrosion control in integral fuel tanks.
DOWSIL™ 94-003 Dispersion Coating
As-supplied properties
Typical values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Physical nature, as supplied | 50% fluorosilicone solids dispersed in methyl ethyl ketone | — | As supplied |
| Color | Buff; transparent in thin sections | — | As supplied |
| Relative density at 25°C | 1.36 | — | CTM 0022 / ASTM D792 |
| Viscosity at 25°C | 6,500 | mPa·s | CTM 0050 / ASTM D1084 |
| Flash point, open cup | -1 | °C | Open-cup method |
Processing and application
Surface preparation, moisture control during mixing and the selected application method influence coating consistency and adhesion. Use the documented substrate, primer, thinning and drying conditions as the starting point for process evaluation.
Application stages
Store at or below 32°C in the original unopened container. Under these conditions, the usable life is 8 months from the date of production. Available package sizes are pint, gallon and 5-gallon containers with respective net weights of 0.45, 3.6 and 18.1 kg. Review the current safety data sheet and container label before handling. The product is not tested or represented as suitable for medical or pharmaceutical uses.
Cured properties and adhesion
Typical values and qualitative adhesion results apply only to the stated methods, substrates, preparation and exposure conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Physical nature, as cured | Elastomer | — | Moisture-cured material |
| Durometer hardness | 40 | Shore A | CTM 0099 / ASTM D2240; cured 7 days at 25°C and 50% relative humidity |
| Low-temperature flexibility | -65 | °C | Cured 7 days at 25°C and 50% relative humidity |
| Adhesion to 2024 clad aluminum | Excellent | — | DOWSIL™ 1200 OS Primer; cured 24 hours at 25°C and 50% relative humidity |
| Adhesion after jet-fuel exposure | Excellent | — | 2024 clad aluminum with DOWSIL™ 1200 OS Primer; after 7 days at 80°C in Jet Reference Fuel |
Applications
The coating is documented for protecting parts from solvents, fuels and oils and for corrosion control in integral fuel tanks. Application-specific evaluation should preserve the intended substrate preparation, coating build and cure conditions.
DOWSIL™ 94-003 coating support
Contact Krayden to discuss substrate preparation, primer use, brush, dip or spray processing, coating build, packaging availability or evaluation of DOWSIL™ 94-003 for fuel-, oil- or solvent-exposed parts. Product fit should be confirmed under the intended substrate, cure and service conditions.
