Disclosed are dental varnishes comprising reaction products of rosins with
polyalcohols dissolved in mixtures of C.sub.2-C.sub.4 alcohols with
C.sub.5-C.sub.7 hydrocarbons or C.sub.5-C.sub.7 hydrocarbons alone which
have been found effective in preventing tooth decay and alleviating tooth
sensitivity. Such varnishes may, optionally, incorporate therapeutic,
antimicrobial and sensory enhancing ingredients.