equal to 1 to 2 and a is defined as with respect to formula 1 and 2 there may be also incorporated into such base polymer of formula 4 in any porportion an alkoxy terminated polymer which may have one or more alkoxy groups in the terminal silicon atom and which has the formula str9 where r r 1 r 2 are each individually selected from c 1 13 monovalent hydrocarbon radicals b is a whole number equal to 0 or 1 e is a whole number which equals to 0 or 1 inclusive the sum of b e is equal to 0 to 1 and x is a hydrolyzable leaving group selected from the class consisting of amino siloxane amido siloxane silazanyl amino carbamato enoxy imidato isocyanato oximato thioisocyanato ureido radicals and radicals of the formula str10 and radicals of the formula str11 where y is a radical of the formula str12 where r 5 r 6 are individually selected from the class consisting of hydrogen a c 1 12 alkyl alkaryl alkylester alkylether aryl alkenyl and aralkyl radical v is a whole number that varies from 2 to 8 where r 3 is selected from the class consisting of.