| abstract |
A room temperature curable organopolysiloxane composition capable of visually recognizing a degree of curing by a change in color, a structure thereof, and a method for determining a cured state are provided. A room temperature curable organopolysiloxane composition containing the following components whose color changes from an uncured state to the progress of curing. (A) Organopolysiloxane represented by the following formula (1) and/or (2): 100 parts by mass (In the formula, R is an unsubstituted or halogen atom substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and n is an integer of 10 or more) (In the formula, R and n are as described above, X is an oxygen atom or an alkylene group having 2 to 5 carbon atoms, m is independently 0 or 1) (B) an organosilicon compound having at least three silicon atom-bonded hydrolyzable groups in one molecule other than components (A), (C) and (D) and/or a partial hydrolyzed condensate thereof: 0.1 to 50 parts by mass (C) Curing catalyst: 0.01 to 20 parts by mass (D) Silane coupling agent: 0.1 to 10 parts by mass (E) pH indicator: 0.01 to 10 parts by mass |