Angelus Leather Dye Angelus leather dye is a permanent liquid dye used for changing the color of all smooth leather articles. These dyes are guaranteed to penetrate the leather, and form a lasting color which will not peel or crack or wash off. They are excellent for re-coloring shoes, saddles, belts, purses, and much more. We strongly recommend preparing the leather with Preparer Deglazer. (The Preparer-Deglazer should never be used on vinyl.) Leather Dye can be thinned with the color Neutral. This dye has stronger pigment than all leather dyes on the market. It will not take much to dye your leather.