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500-224 is an is an opaque, single-component silicone coating and encapsulating compound that cures at room temperature to form an extremely tough, strong, abrasion-resistant coating that completely hides your circuitry and components.

As one of our 500 Series Electronics-grade silicones, 500-224 is a neutral cure (alkoxy) sealant suitable for needle dispense or flow coating. It’s a ready-to-use, room temperature moisture cured silicone that cures to a tough resilient rubber and completely obscures the electronics components concealed beneath it. When a non-corrosive product is required, this is an alternate unprimed adhesive solution that:

  • Delivers a more uniform bond
  • Provides a barrier coating to protect moisture, dust, abrasion, and prying eyes
  • Helps dampen vibrations

A completely opaque/black liquid, 500-224 has a viscosity of ~ 4,000 cPs and begins to gel in less than 20 minutes.

How to Buy
  • Applications
    • Frame and junction box sealant in photovoltaic modules
    • Sensitive electronic components and circuit boards
    • Thin-section encapsulation
    • General electronics/industrial coating applications requiring a non- corrosive product
  • Details

    Novagard’s 500 series moisture-cure conformal coatings and sealants achieve primer-less adhesion to electronics substrates such as FR4, plastic, copper, and other metals. The inside-out cure provides longer working times and low odor, and are free of solvents with no isocyanates.

    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.

  • Packaging
    This product is available in the following formats:
    • 10 ounce cartridge
    • 1 gallon pail
    • 5 gallon pail
    • 55 gallon drum
  • Specifications
    • Physical Properties
      Form Cure Chemistry Electronics Grade Appearance UV Indicator Specific Gravity Viscosity (cPs) Gel Start Time (min) Durometer Shore A Tensile Strength (psi) Elongation (%)
      Conformal Coating and Encapsulant 1 Component Alkoxy Moisture Yes Opaque/Black Available 0.99 4,000 <20 60 700 180
    • Electrical Properties
      Dielectric Strength Dielectric Constant at 100 Hz Dielectric Constantat 100 kHz Dissipation Factor at 100 Hz Dissipation Factor at 100 kHz Volume Resistivity (Ω cm)
      15.1 kV/mm (383 V/mil) 1.72 1.72 0.0010 0.0010 1.83 x 1014
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