This is foam tape and it is usually used in conjunction with your range, specifically on the cooktop. Its purpose is to help seal the edges of the cook top to the counter top. Another of its functions arises is if your cooktop does not sit properly. This tape can give it a better fit by adding additional stability. It is black in color an...Read mored can be used for gasketing, sealing, and stopping vibration. Before making this repair, make sure to shut off the circuit breaker for your appliance in order to disconnect electrical power.