... 2mmHeat sealingheat sealing evenly, level off, without apparent ruffle, become warped edge, Stick label and 5 Gallon caps heat sealing are ... .Thermal stabilityA, resistance to low temperature,the label not appear warped edge,roll edge and loose.B. resistance to high-temperature ... ,the label not appear warped edge,roll edge and loose. New PE 5 Gallon water ...