Check the listing for details. POR 15 41018 Self-Etching Primer Flat Gray, 15 oz. Condition: New. Listed at 69.95 USD. SK Speed Part Number: POR41018This listing is for one 15oz can of Self-Etching Primer IN RESPONSE TO MANY CUSTOMER INQUIRIES REQUESTING A QUICK DRYING AND EASY-TO-APPLY COATING WHICH ENABLES A RESTORER TO QUICKLY TOPCOAT POR-15 RUST PREVENTIVE COATING AND OTHER BASE COATS, WE HAVE DEVELOPED POR-15 SELF ETCH PRIMER.With the POR-15 Self Etch Primer spray can, you can even topcoat POR-15 Rust Preventive Coating that's been in place for months or years.POR-15 Self Etch Primer is NOT a high-build primer like POR-15 High Build Primer, but it can be sprayed on almost any painted surface and can be top coated in 20 - 30 minutes. It bonds incredibly well to POR-15 Rust Preventive Coating, and all topcoats bond incredibly well to POR-15 Self Etch Primer. It can be sanded lightly, and if desired, multiple coats may be applied.In situations where you are topcoating a very old POR-15 Rust Preventive Coating finish, we first recommend a light sanding with any 280 to 320 grit paper.