Higher thermal resistance will result in lower thermal conductivity from one side to the other.
Thermal conductivity of ceramic insulation paint.
By painting your interior ceilings with insulating paint the heat transfer from the saturated fiberglass insulation in your attic can no longer be transferred to the inside of your home.
If you only consider the thermal differential between the unpainted side of the metal and the other side where the paint is exposed the total thermal between those 2 surfaces is the summation of the two thermal resistance.
By applying reflective ceramic paint to your buildings walls or roof you reduce the heat before it even gets to your insulation by reflecting it away.
Other manufacturers have since begun producing their own brands of insulating paint that contain either ceramic or glass microspheres either as an additive or as a premixed paint product both.
The thermal conductivity appears to be low enough to act as an insulation material with sufficient thickness.
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It bonds with the surface of the metal to prevent corrosion and cui.
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Still the thermal conductivity could certainly meet the definition proposed above for a thermal insulating coating particularly if it were applied in several coats.
Thermal conductivity is a material property that describes ability to conduct heat thermal conductivity can be defined as the quantity of heat transmitted through a unit thickness of a material in a direction normal to a surface of unit area due to a unit temperature gradient under steady state conditions.