Compounds comprising a peroxide and a curable blend by peroxidic way, consisting essentially of hydrocarbon elastomers containing at least an acrylic monomer, and of unsaturated fluorinated elastomers obtained by dehydro halogenation of fluorinated VDF-based elastomers, said fluorinated elastomers having in the polymer chain at least 5% by moles of hydrogenated C.sub.1 groups of the type ##STR1## --CH.sub.2 -- and/or --CH.sub.3, the amount of unsaturated fluorinated elastomer in the elastomeric blend being comprised from 1 to 99% by weight.