DOWSIL™ SE 9186 Sealant
DOWSIL™ SE 9186 is a one-part, moisture-cure silicone sealant developed by Dow for electronic, automotive, and general industrial sealing applications. It cures at room temperature to form a soft, flexible, and durable silicone rubber, offering excellent adhesion to a variety of substrates. Available in both Clear and White versions, it is ideal for applications requiring flowable, self-leveling material that can conform to intricate shapes and gaps.
Key Features
One-Part, Room-Temperature Cure : Cures upon exposure to atmospheric moisture without the need for heat.
Flowable and Self-Leveling : Perfect for filling narrow gaps and coating complex geometries.
Fast Tack-Free Time : Typically becomes tack-free in about 8 minutes at 25°C.
Excellent Dielectric Properties : Suitable for electrical insulation in electronics and automotive applications.
Low Volatility and No Added Solvents : Environmentally friendly and suitable for sensitive applications.
Primerless Adhesion : Bonds well to many substrates like metals, plastics, and glass without a primer.
Applications
Electronics
* Potting and coating of circuit boards
* Sealing of connectors and housings
* Moisture protection of electronic modules
Automotive
* Gasketing for electronic control units (ECUs)
* Sealing of sensors and headlamp assemblies
General Industrial Use
* Sealing and bonding of industrial devices
* Protective coating for mechanical assemblies
Typical Properties | |
| Property | Typical Value |
| Appearance | Clear or White |
| Viscosity | ~64,000–66,000 mPas |
| Shore A Hardness | 20–25 |
| Tensile Strength | 2.3 MPa (approx.) |
| Elongation at Break | 340–555% |
| Dielectric Strength | 23 kV/mm |
| Volume Resistivity | 2 × 10¹⁶ Ωcm |
| Specific Gravity | 1.02–1.03 |
Instructions for Use
Surface Preparation
* Clean all surfaces to remove dirt, oil, and moisture before application.
Application
* Apply directly from the container using a manual or pneumatic dispenser.
Curing
* Allow curing at ambient conditions; full cure typically occurs within 24–72 hours depending on thickness and environmental humidity.
Safety and Handling
* Use in a well-ventilated area.
* Avoid direct contact with eyes and skin; wear gloves and eye protection.
* During curing, oxime byproducts are released; ensure good ventilation.
* Store in a cool, dry place away from heat and open flames.
* Consult the Safety Data Sheet (SDS) for detailed handling and first aid measures.
