Disclosed is an ungelled partial hydrolysis product of an organosilicon-containing material, a method for preparing the partial hydrolysis product, and a composition such as a coating composition containing the partial hydrolysis product. The organosilicon-containing material for preparation of the ungelled partial hydrolysis product has an average functionality based on easily hydrolyzable Y groups attached to silicon atoms of greater than or equal to 2.4. The organosilicon-containing material for preparation of the ungelled partial hydrolysis product contains greater than or equal to 10 mole percent of at least one organosilane compound corresponding to the formula, R--Si--Y.sub.3. In the aforesaid formula, R represents hydrogen or a C.sub.1 -C.sub.10 group joined to Si through an Si--C linkage. Each Y in the aforesaid formula represents an easily hydrolyzable group. The partial hydrolysis product is prepared by hydrolyzing a portion of the easily hydrolyzable groups of the organosilane compound with a controlled amount of water. The amount of water employed in the controlled hydrolysis is determined according to the following formula,(E.sub.1,2 .times.0.5)+(E.sub.3,4 .times.Z)=W,whereinW represents the total moles H.sub.2 O employed calculated based on the total equivalents of the easily hydrolyzable groups employed,E.sub.1,2 represents the total number of equivalents of Y employed from organosilane compounds containing one or two Y groups,E.sub.3,4 represents the total number of equivalents of Y employed from organosilane compounds containing three or four Y groups, andZ is a number in the range of from 0.023 to 0.43.