The viscoelastic behavior of three alkyd ceramers was studied using dynamic mechanical thermal analysis (DMTA). A commercial product was compared to model alkyds. The model alkyds were prepared from phthalic anhydride, glycerol, and linseed or sunflower seed oil. Three sol-gel precursors, titanium tetra-i-propoxide, titanium di-i-propoxide diacetylacetonate, and zirconium tera-n-propoxide were investigated. The alkyd ceramers were evaluated as a function of both alkyd type and a sol-gel precursor content. The viscoelastic data showed that both E＇ and T-g were affected by sol-gel precursor content. Both the crosslink density and T-g demonstrated a minimum at low sol-gel precursor contents. After this minimum, both the crosslink density and the T-g increased substantially.