The invention relates to heat-curing reactive compositions based on natural and/or synthetic liquid elastomers containing olefinic double bonds and on vulcanizing agents, where these comprise a quantity, relative to the entire composition, of from 1 to 25% by weight, preferably from 1 to 15% by weight, of at least one liquid polyisoprene, preferably at least one cis-1,4 polyisoprene a quantity, relative to the entire composition, of from 0.5 to 10% by weight, preferably from 0.5 to 5% by weight, of at least one functionalized liquid polybutadiene a quantity, relative to the entire composition, of up to 40% by weight, preferably from 1 to 25% by weight, of a triglyceride fraction, the distribution of fatty acid in which comprises a proportion of at least 5% by weight, more particularly at least 60% by weight, of one or more omega-3 fatty acids and/or one or more omega-6 fatty acids and at least one vulcanizing agent, where the proportion, relative to the entire composition, of synthetic polymers having at least one C═C double bond and/or at least one C≡C triple bond is at least 7.5% by weight, preferably 9% by weight. These have plastisol-like rheology and therefore can be applied at room temperature by conventional spray systems. The invention also relates to use of same as sealant composition or as coating composition, and to methods for bonding components and/or sealing joints between components and/or coating components with use of the compositions.
