3M(TM) Urethane Foam Tape 4108 Natural, 2 in x 36 yd 30.0 mil, 6 per case 3M(TM) Urethane Foam Tape 4108, 3.2mm thick, high density open cell urethane foam, acrylic adhesive one side 3M(TM) Urethane Foam Tape 4108, excellent cushioning characteristics. The absorbent property of open cell foam traps moisture, certain dust and contaminants. high initial stick to many surfaces. High shear strength and temperature performance. The adhesive is protected by a 0.08mm thick white, silicone treated paper liner. Total density in lb/cu ft (kg/cu m) of the foam with adhesive is 16 (256)