3M(TM) Urethane Foam Tape 4104 white, 3/4 in x 18 yd 64.0 mil, 2 per box 6 boxes per case 3M(TM) Urethane Foam Tape 4104 white, 6.4mm thick, High density open cell foam, acrylic adhesive one side 3M(TM) Urethane Foam Tape 4104, 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 12 (192)