A compound, which is an amine-terminated, substantially linear siloxane compound comprising a plurality of siloxane repeating units, wherein: (a) a portion of the siloxane repeating units are independently selected from units of formula: wherein R 1 is selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted; R 2 is selected from alkanediyl and alkenediyl; and R 3 is selected from aryl and heteroaryl, each optionally substituted; (b) a portion of the siloxane repeating units are independently selected from units of formula wherein R 5 and R 6 are independently selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted; (c) the average content of T units and Q units that constitute branch points in the compound is < 3 mol-% per molecule; and (d) the compound comprises terminal groups of formula and wherein R 10 is selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted, and hydrogen; R 11 is optionally substituted alkanediyl; R 12 and R 13 are independently selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted. (a) a portion of the siloxane repeating units are independently selected from units of formula: wherein R 1 is selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted; R 2 is selected from alkanediyl and alkenediyl; and R 3 is selected from aryl and heteroaryl, each optionally substituted; R 1 is selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted; R 2 is selected from alkanediyl and alkenediyl; and R 3 is selected from aryl and heteroaryl, each optionally substituted; (b) a portion of the siloxane repeating units are independently selected from units of formula wherein R 5 and R 6 are independently selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted; (c) the average content of T units and Q units that constitute branch points in the compound is < 3 mol-% per molecule; and (d) the compound comprises terminal groups of formula and wherein R 10 is selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted, and hydrogen; R 11 is optionally substituted alkanediyl; R 12 and R 13 are independently selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted. and wherein R 10 is selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted, and hydrogen; R 11 is optionally substituted alkanediyl; R 12 and R 13 are independently selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted. R 10 is selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted, and hydrogen; R 11 is optionally substituted alkanediyl; R 12 and R 13 are independently selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl, heterocyclyl, aryl and heteroaryl, each optionally substituted.