DOWSIL™ 744 RTV Adhesive Sealant is a one-part, white, non-flowing silicone elastomer designed for general-purpose bonding and sealing applications. It cures at room temperature upon exposure to moisture, forming a durable, flexible rubber with excellent dielectric properties.
Product Overview
Cure System : Moisture-cure, acetoxy-based
Cure Time : Tack-free in approximately 55 minutes; full cure in 24 to 72 hours, depending on thickness and environmental conditions
Operating Temperature : -50°C to +180°C (intermittent peaks up to +205°C)
Color : White
Packaging Options : Available in 90 mL tubes, 310 mL cartridges, and 20 L pails
Certifications : Complies with UL 94 HB flammability rating
Key Features
Non-Flowing Consistency : Ideal for applications requiring a non-sagging sealant
High Elongation : Elongation at break of approximately 590%, providing excellent stress relief
Mechanical Properties:
* Hardness: Shore A 37
* Tensile Strength: 395 psi
* Tear Strength: 30 ppi
Electrical Insulation : Dielectric strength of approximately 16 kV/mm
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
Bonding Large Components : Such as batteries or capacitors to circuit boards
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
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
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