Will body filler stick to por 15?
Emma Payne
Published Jan 07, 2026
CAN I USE BODY FILLER OR PUTTY WITH POR-15? Yes. First paint both sides of the rusted area with POR-15; then use body filler or putty as soon as the POR-15 is dry to the touch.
What can I paint over POR15 with?
Yes! It is okay to paint over Por 15 as it accepts all paint formulas, including lacquer-based ones. In addition, we have the Por 15 Tie-Coat Primer that helps prepare the surface before you topcoat with the Por 15. Therefore, the paint job will be as easy as if you were using any regular paint.
Can I epoxy over POR15?
still gotta roughen up por15 no matter shooting their own tie coat or shooting it with epoxy primer. dont shoot anything over POR15 before it its already cured.
Can you put body filler on rust?
The mere application of body filler over a substrate won't stop rust, Miller said. Fillers might contain corrosion resistance and slow the process, “but they're not gonna stop it,” he said. Put filler on rust, and “(the rust) may continue to grow,” he said.
Will bondo stick to rust converter?
Rust converter converts the rust to primer. You can prime and paint over it. Clean the loose rust off first before converting of course tho. I re-read yes you can bondo over it.
29 related questions foundWill Bondo stick to?
Well-Known Member. Bondo or car body filler , will stick to almost anything as long as the surface is keyed and primed , so you have to seal the base layer first .
How do you treat rust before Bondo?
Using rust inhibiting primers that are zinc or phosphor rich will be the best bet for reducing rust recurrence. Bondo, or whatever else you use, should never be more than 1/8" thick. So at that thickness, it doesn't matter if you put it over primer or bare metal.
Is Bondo body filler waterproof?
Choose between Bondo Fiberglass Resins, Bondo Fiberglass Repair Kits or Bondo Body Fillers. Bondo Fiberglass Resins and Repair Kits are 100 percent waterproof. Because they do not shrink, they are excellent sealers.
How long does fiberglass body filler last?
In most cases, Bondo filler lasts for two to three years. There are car owners who have had Bondo hold on to their vehicle's bodies for even eight years.
What is the best body filler?
We have listed the top three rated car body fillers below;
- 3M Bondo 261 Lightweight Car Body Filler.
- Permatex 25909 Liquid Metal Filler.
- Evercoat 156 Lightweight Car Body Filler.
When can I top coat por15?
The product cures to touch in 30-60 minutes after being applied. A second coat can be applied in two to 72 hours, depending on the ambient temperature and humidity. In temperatures below 55F (15C), POR-15 Top Coat can take 3-4 days to reach maximum hardness.
How do you top coat a por15?
Application Stir POR-15 Top Coat before and during use, DO NOT SHAKE. Using a pouring spout, dispense a portion into a separate container and seal can at once, keeping lid and grooves clean. Do not paint out of can. Apply POR-15 Top Coat in two thin covering coats.
Can you spray on POR-15?
Most people brush it on, but many spray also. Proper equipment and organic vapor particulate respirators for solvents are essential for spraying. HOW DO I THIN POR-15 IF I WANT TO SPRAY IT? You should use only POR-15 Solvent for thinning.
How do you get POR-15 off your skin?
You can try all the toxic chemicals and solvents you want, Por15 will not come off your skin with those. What did work was vegetable oil. I soaked some into a paper towel, and then rubbed the towel over the stuck on Por15, waited 60 seconds, and rubbed it off with a dry paper towel.
Is fiberglass or Bondo better?
Fiberglass is More Durable than Bondo
The first key difference between these two is in regards to durability. Fiberglass is way stronger than Bondo resin. Therefore, when you use fiberglass filler, expect it to outlast car parts that have Bondo.
Can you put Bondo on top of Bondo?
Yes, you can layer bondo over bondo as much as necessary with no problem.
Is Bondo good for cars?
Unfortunately, a dent repair filler like Bondo is not ultimately the best choice you have to fix car dents. Fillers like Bondo can potentially harm your car in the long run.
Does Bondo harden without hardener?
Without it the bondo won't get hard. Put a small piece of bondo on a board and run a line of hardener from end to end. It will take about five minutes to mix it up and apply it.
Can Bondo get rained on?
Bondo does get wet. It isn't 100% waterproof. This means that long-term exposure to water will leave Bondo wet.
Can body filler be applied over primer?
Applying body filler over epoxy primer provides maximum corrosion protection for the metal. Apply filler within seven days of applying epoxy primer to maximize adhesion.
What is the best rust inhibitor?
- Editor's Pick: Rust Converter Ultra. Rust Converter Ultra is a highly rated, affordable, and easy-to-use solution to existing automotive rust problems. ...
- CRC White Lithium Grease Spray. ...
- WD-40 Specialist Long Term Corrosion Inhibitor. ...
- Dupli-Color Exact-Match Scratch Fix. ...
- Fluid Film Protectant and Lubricant.
Can rust Reformer be used on bare metal?
Rust Converter is intended for heavier rust. If applied over bare metal, it will not cure properly and can actually cause light flash rust. If you have an area that you sanded off rust completely, Rust Encapsulator is the product to use in a situation where you have bare metal.
Is there a filler for metal?
Permatex Liquid Metal Filler is an easy-to-use filler that can be drilled, filed, sanded and painted. It forms a long-lasting, metal-tough bond and works on metal, wood, and concrete.
Do I have to prime over Bondo?
Do You Need To Prime Bondo Before Painting? To help your top coats adhere to the metal, you should use a “direct to metal” primer (DTM), but it is not usually necessary under body filler. Once the metal is primed, you can apply a “filler primer” (2K) to hide scratches and minor surface scratches.
Will Bondo stick to primer?
Yes, it can. Bondo is designed in a way that it can stick on primer, paint, and even bare metal. Before modern-day fillers were created, they were designed to stick on bare metal first before primer is applied. When applying Bondo to bare metal, you should sand it once you are done.