High Solid Silicone

Last updated: October 23, 2017

What Does High Solid Silicone Mean?

High solid silicone is a roof coating developed to protect the sheet metal rooftops that cover manufacturing plants and similar structures from corrosion, the sun’s ultraviolet rays, cracks, dents, leaks and rusting. Once applied on the rooftop, this coating forms a waterproof, elastomeric white membrane that protects the material from harsh environmental conditions.


Corrosionpedia Explains High Solid Silicone

High solid silicone based coatings have many uses. Apart from rooftop coating, it is used to protect architectural surfaces such as vertical walls, masonry, concrete, metal, single ply membranes and sprayed-in-place urethane foam systems.

Some specifications of this coating material:

  • Flammable characteristics – This coating has Class “A” non-combustible and Class “B” combustible credentials as tested under UL 790 procedures over spray foam and single ply roofing systems.
  • Tensile strength – 331 psi at 23 °C (73.4 °F) and 432 psi at -17 °C (1.4 °F).
  • Elongation (break) – 192% at 23 °C (73.4 °F) and 216% at -17 °C (1.4 °F).
  • Viscosity – 8000 to 12000 centipoise.
  • Weathering / UV protection – up to 5000 hours.
  • Temperature stability range – 177 °C (350 °F) to -37 °C (-34.6 °F).
  • Flash point – 143 °C (289 °F).

This coating is not recommended for structures that continuously remain below 10 °C (50 °F). A coating application must be applied to a dry surface that remains dry for at least one hour after the application.

Benefits of using high solid silicone:

  • Requires less material to achieve desired film thickness.
  • Removes parapet, stack, vent and pitch pocket leaks.
  • Has better sealing properties for cracks and cervices than normal coatings.
  • Easy to recoat.
  • Reflects solar radiation, which keeps the surroundings cool and reduces the building’s cooling costs.

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