Spray Filler Primer 400mlWhat is filler primer spray? Spray Filler, also known as Primer Filler or Spray Putty (Surface Thick Primer Spray Putty Primer Filler), is a type of high density primer used to level, and fill imperfections and improve paint adhesion on various surfaces. Its thick formula allows it to cover scratches, layer lines in 3D prints, and small irregularities in materials such as plastic, resin, metal, wood, and EVA Foam. In cosplay, the spray filler is