Silicone pressure-sensitive adhesives and tapes

A pressure-sensitive tape comprising a coherent unitary backing and a pressure-sensitive adhesive applied to a surface of said backing, said adhesive comprising the siloxane product of heat intercondensation of a silicone resin, a silicone gum and a catalytic amount of a curing agent therefore, said curing agent comprising before curing from about 10 to about 90% by weight of 2, 4, - dichlorobenzoyl peroxide, from about 2 to about 30% by weight of a plasticizer therefore, said plasticizer being a high boiling ester of low volatility, and for the balance an extender therefore, said extender comprising an alkylaryl or an alkylaralkyl siloxane fluid containing at least about 3% of aryl-silicon or aralkyl-silicon bonds out of the total carbon-silicon linkages.