The Instant, convenient and safe way to disguise thinning areas Gentle action Couvre is a non-greasy creme that dispenses onto a sponge applicator before being applied to the scalp in areas of thinning hair. By selecting a colour slightly darker than the hair, the scalp is subtly darkened, thus neutralising the skins' reflection of light. Takes minutes to apply, 98% water and rub-proof, does not stain or discolour hair, ideal for men or women.