The present invention relates to triorgano phosphites, triorgano amines, heteroaromatic nitrogen compounds, and carbodiimides used as stabilizers for hydrolyzable organic binders. The stabilizers help to prevent viscosity thickening of polymeric binders containing carboxylic ester groups. Without stabilization, the binders can rapidly thicken when exposed to moisture air. The stabilized organic binders of the invention are especially useful for formulating marine antifoulant coatings.