Abstract: The invention relates to a mixture for activation of polytetrafluoroethylene and other fluoroplastics for bonding by means of adhesives. The mixture contains an organometallic compound of an alkali metal stabilized against effects of atmospheric oxygen and humidity and is particularly suitable for the surface activation in a lot or continuous production or for spaceous articles, where the simple use without protective atmosphere is advantageous. It consists of 1-60 wt. % of an organic polymer (mol. wt. above 4000) obtained by polymerization of ethylene, C.sub.1 -C.sub.3 alkyl, phenyl, or C.sub.1 -C.sub.10 alkoxy substituted theylene, ethylene oxide or propylene oxide or a mixture of these polymers, 1 mol of Li, Na or K metal, 0.4-2 mol of a hydrocarbon containing 2-4 bonded, condensed or aneled aromatic nuclei, 500-5000 ml of a solvent from a group comprising aliphatic and cycloaliphatic ethers or polyethers, and, if it is required, up to 50 vol.