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500-211 is a compliant, optically clear coating.

Ideal for LED and other lighting applications, this non-hazardous elastomeric enhances reliability through vibration damping and stress relief. As one of our 500 Series Electronics-grade silicones, 500-211 is a neutral cure (alkoxy) sealant suitable for spraying coating, needle dispensing, dip coating, or flow coating. It’s a ready-to-use, room temperature moisture cured silicone that cures to a resilient rubber that is tough enough to resist abrasion, yet soft and compliant enough to reduce strain on electronics components. 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 against moisture and dust
  • Helps dampen vibrations

A translucent liquid, 500-211 has a viscosity of ~ 1,000 cPs and begins to gel in 5 minutes.

How to Buy
  • Applications
    • Coating of LED lighting assemblies
    • 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 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:
    • This product is temporarily unavailable. Please send any inquiries to [email protected].
  • Specifications
    • Physical Properties
      Form Cure Chemistry Electronics Grade Appearance UV Indicator Specific Gravity Viscosity (cPs) Gel Start Time (min) Durometer Shore A Durometer Shore 00 Tensile Strength (psi) Elongation (%)
      Conformal Coating and Encapsulant 1 Component Alkoxy Moisture Yes Optically Clear Available 0.98 1,000 5 30 80 150 160
    • 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)
      14.3 kV/mm (363 V/mil) 1.22 1.22 0.0099 0.000142 3.11 x 1013
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