A tackified composition comprising (a) a polydiorgannosiloxane polyurea
segmented copolymer comprising the reaction product of (i) at least one
polyaminie, wherein the polyamine comprises at least one
polydiorganosiloxane diamine, or a mixture of at least one
polydiorganosiloxane diamine and at least one organic polyamine, and (ii)
at least one polyisocyanate, wherein the mol ratio of isocyanate to amined
is between 0.9:1 and 0.95:1 or between 1.05:1 and about 1.3:1, and (b)
silicate resins. The tackified compositions are useful as pressure
sensitive adhesives, particularly for foamed backing tapes, medical tapes
and the like, hot melt adhesives, vibration dampers, anti-corrosive
materials.