this is not on conformal coating but all kinda of industrial and food grade polymers

RTV food grade

medical epoxy

glass transition - pdf

polycarbonate

“Polycarbonate has a glass transition temperature of about 147 °C”
"dont do it!"

datahseet for example

stores to check

דבקים מוליכי חום וחשמל לאלקטרוניקה