The THG heat tape can be run with either side up.
You should not be applying liquid to the open end of this electrical product.
Your delaminating pic is the result of your free heat sample being, in your words, "mangled" during shipping to Canada, where the corner was creased and damaged. This should be trimmed before using. Better yet, it should be replaced, which we offered to do, you declined.
As for hotter, heat tape of any brand should always be controlled with a thermostat. Resulting temps in your cage or setup are affected by a number of variables including racking, tub style, substrate depth, ambient room temps and more.
We see very consistent and even heating results with the THG heat tape, and that is a primary goal.
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