3+1 High Build Primer Surfacer Spray–Medium Gray (15 oz)

Seymour Professional 3+1 High Build Primer Surfacer Spray Product Details

Seymour’s Medium Gray Professional 3+1 High Build Primer Surfacer Spray lets you prime, seal, and fill in one step. It’s a flexible acrylic auto body primer designed for professional collision repair and refinishing applications. With Seymour 3+1, technicians get a primer that helps them streamline their workflow without sacrificing quality or results.

Formulated for steel, aluminum, fiberglass, SMC, and properly prepared plastics, 3+1 High Build Primer Surfacer delivers superior adhesion and excellent filling performance. Hide scratches and imperfections and create a smooth, uniform surface that sands easily and is compatible with most automotive topcoats.

• Medium Gray Professional 3+1 Primer Surfacer Spray that primes, seals & fills in one step
• Easy-sanding acrylic primer surfacer for professional collision repair
• Works on bare steel, aluminum, plastics, fiberglass, SMC & previously painted surfaces

Primes, Seals & Fills in One Step

Our 3+1 High Build Primer Surfacer does three jobs in one step. It primes with excellent adhesion to common collision repair substrates. It seals by locking in lower layers so your topcoat stays smooth and consistent. It fills; the high-build formula smooths surface scratches and imperfections for a flawless finish. And since it’s Seymour, it does it all in just one step.

Spray, build, sand, and topcoat, knowing that you’re saving time and money without compromising on quality.

Superior Adhesion to a Variety of Substrates

Seymour Professional 3+1 High Build Primer Surfacer Spray is formulated for exceptional adhesion to the most common substrates used in collision repair and refinishing:

• Steel
• Aluminum
• Fiberglass
• SMC
• Sanded E-coat
• Sanded OEM finishes
• Properly prepared semi-rigid plastics

High Build, Easy Sanding & Outstanding Topcoat Compatibility

3+1 High Build Primer Surfacer fills scratches and surface flaws with a thick, uniform layer. Its excellent build and fill performance helps smooth out imperfections for an impeccable finish.

Once dry, our spray primer sands cleanly and easily. Now, you have the ideal surface for a topcoat. Seymour 3+1 is compatible with most automotive refinish materials and delivers outstanding results. You’ll get a dependable, exceptional finish and a streamlined process.

Fast-Drying & Flexible!

In a busy shop, you can’t afford to wait. Our Medium Gray Professional 3+1 High Build Primer Surfacer Spray dries quickly and is typically ready to sand in about 60 minutes at room temperature. Once cured, this flexible film moves with steel, aluminum, and plastic parts, helping reduce the risk of cracking or lifting. That quickness and flexibility make it the ideal choice.

Quick Facts

• Medium Gray high build, flexible acrylic primer surfacer spray
• Primes, seals & fills in one step
• For professional collision repair & refinish work
• Coverage approximately 10 square feet at 2 mils dry film thickness
• Fast-drying
• Easy-sanding
• Recommended substrate prep P180–P320 on metal & composites, P240–P320 on plastics
• Recommended sanding P320–P400 before topcoat
• Compatible with most automotive refinish materials
• MIR 0.94 meets California auto body primer MIR limit 0.95
• Ready-to-use aerosol, no mixing or spray gun cleanup
• Shelf life of 2 years when stored properly in a cool, dry, ventilated area away from heat, sparks & flames