Are you wondering what the best automotive filler primers are?
I once fixed a rusty spot on my old truck using a great filler primer, and now I can share my top picks to help you get that perfect smooth surface for painting.
Automotive filler primers fix dented or rusty car parts. They make surfaces smooth for painting. Pick the right one to save time and money.
I once saved my old truck from rust with a good filler primer. It turned a rough spot into a perfect base for paint.
Trust this guide to find the best options. Get ready to learn easy tips that work.
List of Top 10 Automotive Filler Primers
| Image | Title | Best For | Price |
|---|---|---|---|
![]() |
Rust-Oleum 260510 Stops Rust Automotive 2-in-1 Filler & Sandable Primer Spray, 12 oz, Gray |
This product is perfect for DIY auto enthusiasts and home mechanics who want to fix rust and smooth out scratches on their cars or trucks. It’s ideal for anyone working on metal, wood, or fiberglass surfaces to get a smooth, rust-resistant base for painting. |
|
![]() |
Rust-Oleum 260510-6PK Automotive 2-in-1 Filler & Sandable Primer Spray, Gray, 12 oz (Pack of 6) |
Looking to prep your ride for a fresh coat of paint? The Rust-Oleum 2-in-1 Filler & Sandable Primer Spray is perfect for car enthusiasts and DIYers! This easy-to-use spray fills minor imperfections and creates a smooth, rust-resistant base, so your top coat looks incredible. |
|
![]() |
Rust-Oleum 254863 Automotive Filler Primer Brush On, Quart, Gray 32 Fl Oz (Pack of 1) |
This Rust-Oleum Automotive Filler Primer is perfect for DIY auto enthusiasts who need to fix rust spots on cars, trucks, or boats. It covers metal, wood, and fiberglass with ease to make surfaces smooth and ready for paint. |
|
![]() |
Rust-Oleum 260737 Automotive Sandable Primer Spray, 12 oz, White |
This spray primer is perfect for car owners who want to stop rust and get a smooth surface fast. It works on all types of vehicles with an easy spray that dries quick and sands well. |
|
![]() |
6-Pack of 11 oz Rust-Oleum Brands 249279 Gray Automotive Filler Primer Spray |
Do you want a smooth finish on your car project? This 6-pack of primer is perfect for anyone fixing up a vehicle. It’s easy to use. |
|
![]() |
Dupli-Color FP101 Scratch Filler Primer, Gray – 11 oz. Aerosol Can |
This Dupli-Color Filler Primer is ideal for car lovers and DIY fans who need to fix deep scratches on cars, boats, or wood items. It helps anyone create a smooth surface for better paint work. |
|
![]() |
Rust-Oleum 249279-2PK Automotive Filler Primer Spray, 11 oz, Gray, 2 Pack |
This spray is perfect for car lovers who want to fix scratches and stop rust on their rides. It also suits DIY workers prepping metal, wood, or fiberglass for a smooth paint job. |
|
![]() |
Speedokote SS-2790G/SS-2790A Super Fill High Build Primer Gray gallon kit. |
Want smooth surfaces? This primer is perfect! It offers high build and filling power. It’s great for anyone who wants to fix tiny flaws on their car. |
|
![]() |
Rust-Oleum 249418 Automotive Sandable Primer Spray, 12 oz, Black |
This automotive sandable primer spray is perfect for car or truck owners who need to stop rust on metal parts. It’s also ideal for anyone fixing wood or fiberglass surfaces in their vehicles with a fast-drying, tough coat. |
|
![]() |
U-POL Expert Color Filler Primer, Automotive Primer, Professional Grade, Fills Imperfections, Easy-To-Use, Gray |
This U-POL Expert Color Filler Primer is perfect for anyone who wants a smooth car finish. It’s great for small fixes or big jobs. |
Detailed Reviews
Looking for the perfect auto finish? This guide reveals top filler primers for smooth results. We combined expert picks and user reviews just for you. Find your ideal primer and transform your ride today. Get ready for a flawless paint job every time!
1. Rust-Oleum 260510 Stops Rust Automotive 2-in-1 Filler & Sandable Primer Spray, 12 oz, Gray

Say goodbye to rust with the Rust-Oleum Stops Rust primer spray. This 2-in-1 filler works on wood, metal, and fiberglass. It fills imperfections and sands smooth for a perfect finish.
The oil-based formula dries fast in just 10 minutes. It covers up to 10 square feet per can.
Get superior adhesion with its flat finish. The advanced spray system lets you paint at any angle. Use the comfort spray tip for easy control.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This product is perfect for DIY auto enthusiasts and home mechanics who want to fix rust and smooth out scratches on their cars or trucks. It’s ideal for anyone working on metal, wood, or fiberglass surfaces to get a smooth, rust-resistant base for painting.
Ready to Purchase?
2. Rust-Oleum 260510-6PK Automotive 2-in-1 Filler & Sandable Primer Spray, Gray, 12 oz (Pack of 6)

Tired of rust ruining your ride? Get Rust-Oleum Automotive 2-in-1 Primer! It’s the easy way to prep your car or truck. Now you can protect your vehicle and make it look great.
This filler and primer fills in small dings fast. The sandable formula makes a smooth surface for paint.
| Pros | Cons |
|---|---|
|
|
Perfect For:
Looking to prep your ride for a fresh coat of paint? The Rust-Oleum 2-in-1 Filler & Sandable Primer Spray is perfect for car enthusiasts and DIYers! This easy-to-use spray fills minor imperfections and creates a smooth, rust-resistant base, so your top coat looks incredible.
Ready to Purchase?
3. Rust-Oleum 254863 Automotive Filler Primer Brush On, Quart, Gray 32 Fl Oz (Pack of 1)

This automotive filler primer works well on metal, wood, and fiberglass surfaces. It has an oil-based formula that stops rust, prevents corrosion, and helps paint stick better. It dries to the touch in 10 to 15 minutes and covers 40 to 50 square feet per quart.
The primer fills minor scratches and surface nicks for a smooth, paintable surface. Avoid heat over 350°F and start fixing your projects now.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Rust-Oleum Automotive Filler Primer is perfect for DIY auto enthusiasts who need to fix rust spots on cars, trucks, or boats. It covers metal, wood, and fiberglass with ease to make surfaces smooth and ready for paint.
Ready to Purchase?
4. Rust-Oleum 260737 Automotive Sandable Primer Spray, 12 oz, White

Rust-Oleum Automotive Sandable Primer Spray fights rust like a champ. It works on cars, trucks, and more for a strong base coat.
This primer dries fast so you can work quick. It stops rust dead in its tracks. Spray from any angle for an even coat.
It sands smooth to give your paint job a pro look. Trust this primer for top results every time.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This spray primer is perfect for car owners who want to stop rust and get a smooth surface fast. It works on all types of vehicles with an easy spray that dries quick and sands well.
Ready to Purchase?
5. 6-Pack of 11 oz Rust-Oleum Brands 249279 Gray Automotive Filler Primer Spray

Fix dents and bumps on your car with this hi-build formula. It fills in imperfections perfectly for a smooth surface. Stops rust so your vehicle looks great for years.
Spray easily in any direction thanks to the Any-Angle Spray with Comfort Tip. Grab a 6-pack of 11 oz cans today and get your car ready.
| Pros | Cons |
|---|---|
|
|
Perfect For:
Do you want a smooth finish on your car project? This 6-pack of primer is perfect for anyone fixing up a vehicle. It’s easy to use.
Ready to Purchase?
6. Dupli-Color FP101 Scratch Filler Primer, Gray – 11 oz. Aerosol Can

This is the Dupli-Color FP101 Scratch Filler Primer in gray. It comes in an 11 oz. aerosol can for easy use.
It fills deep scratches and minor imperfections on cars. Sand it easily for a smooth surface that resists rust. It also helps paint stick better on top.
Use it on metal, fiberglass, and wood surfaces inside or outside vehicles. The spray nozzle covers evenly for a lasting finish. Dupli-Color has been a trusted brand since 1938 for car products.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Dupli-Color Filler Primer is ideal for car lovers and DIY fans who need to fix deep scratches on cars, boats, or wood items. It helps anyone create a smooth surface for better paint work.
Ready to Purchase?
7. Rust-Oleum 249279-2PK Automotive Filler Primer Spray, 11 oz, Gray, 2 Pack

Get ready to transform your auto projects! This Rust-Oleum primer is your new best friend.
It’s perfect for metal, wood, and fiberglass. It also fights rust. Get ready for a smooth finish!
This primer fills in scratches and nicks fast. It also dries in just 10 minutes. Spray at any angle for easy use.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This spray is perfect for car lovers who want to fix scratches and stop rust on their rides. It also suits DIY workers prepping metal, wood, or fiberglass for a smooth paint job.
Ready to Purchase?
8. Speedokote SS-2790G/SS-2790A Super Fill High Build Primer Gray gallon kit.

Speedokote SS-2790G/SS-2790A is a super fill high build primer in a gray gallon kit. It creates a strong layer that fills rough surfaces fast.
This primer saves time on jobs. It covers well without bumps. Grab yours now for smooth results.
| Pros | Cons |
|---|---|
|
|
Perfect For:
Want smooth surfaces? This primer is perfect! It offers high build and filling power. It’s great for anyone who wants to fix tiny flaws on their car.
Ready to Purchase?
9. Rust-Oleum 249418 Automotive Sandable Primer Spray, 12 oz, Black

Rust-Oleum makes a sandable primer spray for cars and trucks. It stops rust and works on wood, metal, and fiberglass.
This oil-based paint dries in 10 minutes. It covers 15 square feet. You can sand it wet or dry.
It gives a smooth surface after sanding. The flat finish helps paint stick well.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This automotive sandable primer spray is perfect for car or truck owners who need to stop rust on metal parts. It’s also ideal for anyone fixing wood or fiberglass surfaces in their vehicles with a fast-drying, tough coat.
Ready to Purchase?
10. U-POL Expert Color Filler Primer, Automotive Primer, Professional Grade, Fills Imperfections, Easy-To-Use, Gray

Want a perfect paint job? The U-POL Expert Color Filler Primer is what you need. It makes surfaces smooth and ready for paint. Get a professional finish easily!
This automotive primer fills tiny flaws fast. It makes painting your car super easy.
Use this for a smooth base and great color. It’s the secret to amazing results!
| Pros | Cons |
|---|---|
|
|
Perfect For:
This U-POL Expert Color Filler Primer is perfect for anyone who wants a smooth car finish. It’s great for small fixes or big jobs.
Ready to Purchase?
Buying Guide
Automotive filler primers make fixing dents and rust easy. They create a smooth base for painting your car.
I saved my rusty truck by using a good filler primer. It turned rough spots into a perfect surface for paint.
- Surface Compatibility: Check if the primer works on metal, wood, or fiberglass. This ensures it sticks well to your car’s parts.
- Rust Protection: Choose a primer that stops rust and prevents corrosion. It keeps your vehicle safe for years.
- Filling Ability: Look for ones that fill scratches and dings. They make surfaces even for a smooth paint job.
- Drying Time: Pick products that dry fast, like in 10 minutes. This saves time on your projects.
- Application Type: Decide between spray or brush-on options. Spray lets you paint from any angle easily.
- Sandability: Get a sandable primer for wet or dry sanding. It gives a pro-like finish before painting.
- Coverage Area: Consider how much area one can covers, like 10 to 50 square feet. This helps plan how many you need to buy.