The invention relates to a paint used for reinforcing and resisting water for an EMAS foamed cement. The paint comprises the following components in parts by weight: 80-150 parts of alpha; omega-dihydroxy polydimethyl siloxane; 0.5-15 parts of linear polydimethylsiloxane, hydroxyl terminated; 3-20 parts of fumed silica; 10-70 parts of aluminium hydroxide; 0.1-5 parts of color masterbatch; 0.5-5 parts of a catalyst organo tin chelate; a cross-linking agent comprising 1-10 parts of methyl-tri-(butanone-oxime) silane, 1-10 parts of vinyltris(methylethylketoximino)silane, 1-7 parts of aminopropyl triethoxy silane hydrolysate, 0.5-7 parts of gamma-glycidyl ether oxygen propyl trimethoxy silane; and 200-800 parts of a solvent, preferably 300-500 parts of the solvent.