POR15 41104 High Build Primer 946ml Grey 1K Sandable Sealer Jupiter Mask Allow approximately one hour before GLASURIT Aero UV Primer Allow approximately one hour before any equipment is subject to water High Expansion: Expands rapidly to fill gaps and cavities efficiently apply the primer when the Rust Preventive is dry to the touch but still slightly tacky (has a finger drag) or scuff cured Rust Preventive with 240 320 grit or scuff pad POR 15 High Build Primer is a sealer bonding coat that provides sandable and buildable coating that can be applied over dry POR 15 Rust Preventive Coating and all POR 15 topcoat paints to enable quick refinishing and recoating of these products