500-452 Electronics-grade Alkoxy Silicone
(1-part sealant)
500-452 (previously marketed as 500-09x and 500-092) is a high performance UL-rated electronics adhesive. This one-part UL flame rated paste is for applications that require superior bond strength and flame/fire resistance.
As one of our 500 Series Electronics-grade silicones, 500-452 is a neutral cure (alkoxy), UL flame rated gray paste with a good balance of tensile strength and elongation. It’s a ready-to-use, room temperature moisture cured silicone that cures to a tough, resilient elastomer with no unreacted components remaining after cure. When a non-corrosive product is required, this is an alternate unprimed adhesive solution that:
- Delivers a more uniform bond
- Acts like a gasket to protect against moisture and dust
- Helps dampen vibrations
500-452 comes in paste form, skins over in less than 10 minutes, and is completely cured within 3 days. Specially formulated to retain its physical properties even during service in extreme environmental conditions, it is ideal for applications that require superior bond strength and a UL 94 V-0 rating. 500-452 offers excellent electrical insulation with arc-resistance properties.
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Applications
- Frame and junction box sealant in photovoltaic modules
- Sensitive electronic components and circuit boards
- General industrial sealing and bonding applications requiring a non-corrosive product
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Details
Novagard’s 500 series moisture-cure conformal coatings and sealants achieve primer-less adhesion to aluminum, polycarbonate, glass, and steel. The inside-out cure provides longer working times and low odor, and are free of solvents with no isocyanates. Designed for electronics and industrial applications, these materials are well suited to sealing and bonding applications to a wide variety of plastic and non-porous substrates.
Certain materials, chemicals, curing agents, and plasticizers may inhibit the cure. The most notable are organotin catalysts, amino compounds, polysulfide, and other sulfur-containing materials. Do not use in or around highly oxidative chemicals such as liquid oxygen, chlorine, or peroxides. Not recommended for surfaces that are to be painted.
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Packaging and Lead Times
This product is available in the following formats:
- 10 ounce cartridge
- 1 gallon pail
- 5 gallon pail
- 55 gallon drum
Lead times are:
- 10 business days
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Specifications
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Physical Properties
Form Cure Chemistry Electronics Grade Appearance Specific Gravity Viscosity (cPs) Extrusion Rate Skin-Over Time (min) Cure Time Durometer Shore A Tensile Strength (psi) Elongation (%) Paste 1 Component Alkoxy Moisture Yes Gray 1.40 250,000 (Brookfield HB #7 @ 10 rpm) 55 gm/min 8 3 days 42 400 185 -
Electrical Properties
Dielectric Strength Dielectric Constant at 100 Hz Dielectric Constant at 100 kHz Dissipation Factor at 100 Hz Dissipation Factor at 100 kHz Volume Resistivity (Ω cm) 17.7 kV/mm
732 V/mil2.95 2.85 0.0053 0.0054 2.50 x 10 14 -
Certifications
Flammability (UL-94) UL 94 V-O (pending)
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Physical Properties
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