The easiest way to get your car perfectly straight and ready for paint. No Paint Gun Needed!
The Eastwood Service PlanProtect your purchase with comprehensive coverage24/7 supportNo deductibles, no additional feesParts & labor costs includedTransferable coverage and more
90 day Warranty Included
90 Day Returns + 100% Satisfaction Guarantee
FREE Lifetime Tech Support
The Eastwood Company Warranty
100% Customer Satisfaction Guarantee
At Eastwood we care about your DIY automotive projects and want you to be 100% satisfied with our products. That’s how we’ve done business since 1978.
Warranty periods vary per product and manufacturer.
The warranty period begins on the date the product is delivered.
Warranty refunds and exchanges require proof of purchase.
To obtain warranty coverage, contact Eastwood at 1-800-343-9353 for an RMA number.
FREE Lifetime Tech Support
We're here to help you Do The Job Right.
This product includes FREE Lifetime Tech Support from our U.S.-Based Customer Solutions Team.
Looking for advice on your project or product recommendations? Our in-house Project Advisors have the same passion for DIY automotive restoration as you do. Get advice on your project, personalized product recommendations and answers to your questions. Give us a call or email [email protected].
OptiFlow Roll-On Urethane Primer is the easiest and most efficient way to get your car in a primer designed to fill imperfections, whether you're tackling the entire project or just doing one panel at a time! With excellent adhesion and corrosion resistance over bare steel as well as aluminum, fiberglass, body fillers and even existing finishes, it's the basis for a perfectly straight car with NO PAINT GUN NEEDED! Easily get your project perfectly straight with this urethane primer that sands and fills easily, saving you time and money. The finish will be so smooth everyone will think the great results came from an expensive HVLP spray gun.
To properly apply this product and get the best results, you will need the
OptiFlow Roller and Tray Kit which can be easily added to your cart in the Frequently Bought Together section of this page.
OptiFlow Advantages
Save THOUSANDS when you do it yourself, and that's money you can spend on an engine, wheels or more tools!
No overspray (in your garage or on the neighbor's car)
Minimal masking required
No airline contamination
Confidence to primer your project! Plus pride in knowing you did it yourself.
Fast and easy cleanup
OptiFlow Urethane Primer Details
Easy 4:1 mix ratio with separate activator (item 23133zp). Enough to cover most cars.
Sands easily 4 hours application.
DTM - Direct To Metal application for a strong bond. Even apply over existing coatings, fiberglass and fillers.
50 State Compliant.
Awesome results without overspray or professional spray equipment. Plus no gun to clean. Save Time & Money.
Nobody will know it was rolled on unless you tell them!
If you're sanding primer or body filler you have to check out the Eastwood Elite Contour DSB Dustless Sanding Block System that gives you laser straight panels while keeping you and your shop clean because it eliminates 95% of the sanding dust.
Rated 5 out of
5 by
Robert M from
Epoxy primer optifloweasy to use with great results, i feel much better having parts for a protected protect by this epoxy primer.. again no over spray issues if you don't have a both. covers very well but get the mix 4:1 correct and it harden quickly for first time user note your pace.
Date published: 2025-11-02
Rated 5 out of
5 by
Robert M from
new opportunity with optiflow primer.this product, produces excellent results as part of the optiflow line. i was not sure what to expect from a roll on primer but i was impressed with the results. I don't have a paint both so optiflow is a great opportunity, i did not have to worry about over spray and getting it on my other cars. very happy with results and it sands well.
Date published: 2025-11-02
Rated 5 out of
5 by
racer186 from
Great primer for DIY and hobbyist!I picked the epoxy kit up for an old Corvette racecar that has seen alot of body repairs over the years. I was excited to try the roll on product to save a large amount of cleanup and masking time. The primer seemed a little thin at first, but after the fist coat flashed for a few minutes, it really solidified when I went back over to "roll out" the air bubbles. This is similar to the "roll & tip" process used on some marine paints for boats. The second primer coat really started to build some film thickness. I applied the epoxy in cooler weather and gave extra time between coats to ensure the solvents had flashed. The application came out smoother than some sprayed polyester primer coats I have shot in the past. Just pay attention to the instructions, make sure everything is clean and be patient. It will work out great. when the epoxy starts to kick, resist the temptation to try to try to get the last bit applied or roll over a rough section, you will cause yourself issues, just like body filler. Based on the experience with the eopxy, I will try the urethane high build primer next.
Date published: 2025-10-28
Rated 5 out of
5 by
Larry S from
Made garage painting convenientWe followed directions to the letter and probably went beyond that with our cleaning directions to insure we were putting everything on a clean surface. We only ended up with a few minor runs (will sand off easily) and coverage after 2 coats was thorough. Took us a while to master the rolling skills but lightly rolling over the surface when done left us with a nice finish. Very happy with the results!!
Date published: 2025-10-23
Rated 5 out of
5 by
Jack Kiplinger from
Roll on primerWorked great after following directions. Great hard finish when cured.
Date published: 2025-09-12
Rated 5 out of
5 by
Doug C from
Very little mess. No overspray.Nice finish with roller. Easy to apply. Very thin liquid. Works great on flat horizontal surfaces. On vertical surfaces I had a few runs. Figured it out on the 3rd panel. Runs sanded easily.
Can this also be sprayed on with HTE or HVLP instead of rolled?
Asked by: Marv
No, Eastwood Opti-Flow Epoxy Primer is specifically designed as a roll-on primer system and is not intended for spray application with conventional spray guns or HVLP equipment. If you want to spray on a primer, you should use Eastwood’s standard sprayable epoxy primers, such as Item #51128ZP
Answered by: Bill G Tech Advisor
Date published: 2026-01-28
can this product be used over rust encapsulator pro?
Asked by: Rob78
Yes, Eastwood OptiFlow Primer can be applied over Rust Encapsulator Plus. However, it is essential to ensure that the Rust Encapsulator Plus is fully cured and properly prepared before applying the OptiFlow Primer. The surface should be clean, dry, and free of contaminants to ensure proper adhesion. Additionally, lightly scuffing the surface may help improve adhesion between the two products.
Answered by: Bill G Tech Advisor
Date published: 2025-11-25
2. Is it compatible with your Eastwood 2K AeroSpray Epoxy Primer
Asked by: Brian78
Yes, the Epoxy Primers are compatible. We actually sell the aerosols with one of the Opti-Flow kits.
Answered by: Bill G Tech Advisor
Date published: 2025-07-08
Can the optiflow roll on be applied and cure in temps above 77 degrees?
Asked by: Stephen
77 degrees is a good temperature for application. Just monitor that humidity is not to high and between 35% to 75%.
Answered by: Bill G Tech Advisor
Date published: 2025-07-02
What is the expected coverage of a gallon of primer?
Asked by: Stephen
Easy 1:1 mix ratio with separate catalyst (item 23131) to make two roll-able gallons. Enough to cover most cars.
Answered by: Bill G Tech Advisor
Date published: 2025-07-02
Can you also brush this on? What are the recommended bryshes
Asked by: Dave
Using brushes is not recommended as they are not suitable for achieving the desired smooth and even finish. 7” Foam Roller: Ideal for large, flat panels such as doors, hoods, and roofs. 6” Foam Roller: Best for roof edges, windshield pillars, body line contours, and tight spaces.
Answered by: Bill G Tech Advisor
Date published: 2025-07-02
If I do not want to strip the car, but I do end up with a mix of preped old finish, filler, feathered paint and bare metal. Can I just apply the epoxy primer? or should I use epoxy for a first coat, then urethane? Still need build as well.
Asked by: Alex69
You would want your first layer to surely be the Epoxy Primer. That is going to give the best corrosion resistance for your bare metal. Then follow with your Urethane Surfacer to seal everything up and provide you the layers to block sand. 2 to 3 coats will give you the foundation to block sand and prepare for your final paint.
Answered by: Bill G Tech Advisor
Date published: 2025-07-01
How do you Prep or prime or paint galvanized metal? Most of my replacement panels are galvanized. I was hoping to use roll on epoxy primer or a type of etching primer, but do not see mention of galvanized in descriptions. Thanks
Asked by: Dave
Thorough cleaning and surface preparation are essential to ensure good adhesion with galvanized. Wipe down with a good PRE cleaner. DA sand with 80-180 to rough the surface. Utilize a product like our Fast Etch to etch the metal next. The etching is important. Another final wipe down with a PRE cleaner and follow with the Epoxy Primer. If you choose to use a Self Etch Primer to etch, do NOT combine that with Epoxy. Instead seal off the Self Etch with a good Urethane Primer, no Epoxy.
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