DOWSIL™ 738 Electrical Sealant is a one-part, room-temperature curing silicone adhesive/sealant designed for electrical and electronic applications. It cures upon exposure to moisture, forming a durable, flexible rubber that provides excellent protection against environmental factors.
Product Overview
Cure System : Acetoxy (releases acetic acid during curing)
Cure Time : Tack-free in approximately 89 minutes; full cure in 24 to 72 hours, depending on thickness and environmental conditions
Operating Temperature : -62°C to +180°C (intermittent peaks up to +205°C)
Color : White
Packaging Options : Available in 90 mL tubes, 300 mL cartridges, and 17.6 kg pails
Certifications : Complies with MIL-A-46146 Type I
Key Features
Non-Corrosive : Suitable for use on corrosion-sensitive components
Electrical Insulation : Dielectric strength of approximately 475 V/mil
Mechanical Properties:
* Hardness: Shore A 35
* Tensile Strength: 360 psi
* Elongation at Break: 500%
Adhesion: Good adhesion to a variety of substrates, including metals, glass, ceramics, and plastics
Weather Resistance: Resistant to ozone, UV radiation, and temperature extremes
Applications
Electrical Sealing : Sealing around wires, electrical connections, control boxes, conduit ends, printed circuit boards, motors, generators, terminals, leads, and splices
General Industrial Use : Bonding and sealing in appliances, automotive, aerospace, and electronic assemblies
Formed-in-Place Gaskets : Creating custom gaskets for compressors, gearboxes, and pumps
Safety and Handling
Ventilation : Use in well-ventilated areas to avoid inhalation of acetic acid vapors released during curing
Skin and Eye Contact : Avoid contact; use appropriate personal protective equipment
Storage : Store in a cool, dry place away from direct sunlight
Shelf Life : Up to 12 months when stored in unopened containers at or below 27°C