Have you had any issue with chemicals from the heated plastic or any melting? i would think the plate wouldn't be hot enough to melt anything more just keep things warm.
Have any of you used the metal heating plates to keep 5 gallon buckets unfrozen? I want to take a 5 gallon lowes bucket and put some nipple on it but need a way to keep it from freezing and came across heating plates that you just set the bucket on. My only concern is the plastic melting in some...