Fibreglass Evercoat 421 EASY SAND Flowable Polyester Finishing and Blending Putty - 30 oz. Pumptainer Contains ZNX-7 for superior adhesion and feather-edging to galvanized steel and aluminum Smooth, self-leveling viscosity eliminates unwanted surface texture, which saves sanding time Contains Hattonite, a unique ingredient that acts as a dry lubricant to reduce heat and friction from aggressive sanding; sands easily without clogging sandpaper Formulated with a premium, stain resistant resin for use with Basecoat / Clearcoat paint systems Low porosity finish, reduces solvent swelling, shrinkage and repair mapping