Special rubber protective primer

The invention relates to a special rubber protective primer, which is composed of a sealing varnish and a primer, and is characterized in that the sealing varnish is composed of chlorinated rubber, butanone, butyl acetate, xylene and the like; wherein the primer consists of a component A and a component B; the component A is prepared from hydroxy acrylic resin, iron oxide red, mica powder, aluminum triphosphate, zinc phosphate, a dispersing agent, a leveling agent, an antifoaming agent, a catalyst, a mixed solvent A and the like; and the component B is composed of mixed polyisocyanate and a mixed solvent B. The sealing varnish has good adhesion and low permeability between the sealing varnish and a special rubber base material, can effectively prevent water vapor, salt and other corrosivemedia from permeating and diffusing to a substrate under the synergistic protection effect of primer corrosion prevention, and has a good protection effect on special rubber, so that the special rubber can be used in salt mis