3M Scotchkote Liquid Epoxy Coating 327 is a two-part system designed to protect steel pipe and other metal surfaces from the harsh affects of corrosion. Scotchkote 327 is mixed in a 3A:1B volume ratio.Mix nozzles sold separately. For use with the 3M Scotchkote Liquid Epoxy Coating Manual 450 ml. Applicator OR 3M Scotchkote Liquid Epoxy Coating Spray System HSS 450 ml. Applicator.