Profile: Ultimate Linings specializes in providing bed liners & industrial coating solutions. Polyurea coatings & linings are more commonly applied over concrete & steel for corrosion protection & abrasion resistance. Polyurea can be molded & shaped by spraying it into molds. UL 283 is a single component, liquid applied, aromatic urethane polyurea primer. It can be applied using an airless sprayer, brush, or phenolic resin core roller.