Room-temperature curable organopolysiloxane composition

A room-temperature curable organopolysiloxane composition comprising:

• (A) 100 parts by weight of a diorganopolysiloxane represented by a general formula (1) shown below:
• 12
• wherein, each R represents, independently, an unsubstituted or substituted monovalent hydrocarbon group, each A represents, independently, an oxygen atom or a bivalent hydrocarbon group of 1 to 8 carbon atoms, each Y represents, independently, a hydroxyl group or a hydrolysable group, m represents an integer from 0 to 2, and n represents a number which results in a viscosity at 25° C. for this diorganopolysiloxane within a range from 20 to 1,000,000 mm2/s;
• (B) 0.5 to 20 parts by weight of an organosilicon compound represented by a general formula (2) shown below, a partial hydrolysis-condensation product thereof, or a mixture of the two:
• R1aSiX4-a (2)
• wherein, each R1 represents, independently, an unsubstituted or substituted monovalent hydrocarbon group of 1 to 6 carbon atoms, each X represents, independently, a hydrolysable group, and a represents an integer from 0 to 2;
• and
• (C) 1 to 60 parts by weight of an oxyalkylene group-containing organopolysiloxane with at least one group represented by a general formula (3) shown below bonded to a silicon atom within each molecule:
• —R2—Si(R3)2—O—(R4O)b—R5 (3)
• wherein, R2 represents a bivalent hydrocarbon group of 1 to 6 carbon atoms, each R3 represents, independently, an unsubstituted or substituted monovalent hydrocarbon group of 1 to 6 carbon atoms, R4 is an alkylene group of 2 to 4 carbon atoms, R5 is an unsubstituted or substituted monovalent hydrocarbon group of 1 to 8 carbon atoms or a group represented by a formula —R6—SiX3 where, X is as defined above, and R6 is a bivalent hydrocarbon group of 1 to 6 carbon atoms, and b is an integer from 1 to 30.