Terry Kitzman
Well-Known Member
Can anyone recommend a good product?
I have not seen it promoting rust. The only issue is that the metal gets more difficult to work with after application. It is tough stuff.Never ever use POR 15! I think it actually promotes rust.
I have not seen it promoting rust. The only issue is that the metal gets more difficult to work with after application. It is tough stuff.
Never ever use POR 15! I think it actually promotes rust.[/QUO also peals off.
I agree, It peels off.I had a car sandblasted and I painted it with POR 15. After 2 years it was rusting through. And the car never left the garage! I had another car in the garage in bare metal for 8 years that never rusted. Yesterday I checked on some fan motor brackets that I painted with POR 15 5 years ago, all the paint had peeled off and metal was very rusted.
I’ve used POR 15 for many years and everything I used it on has rusted through.
Including sand blasted metal, rusted metal, frames, gas tanks, natural gas lines, heating and cooling units...
And yes, it was applied probably and with their cleaners,pretreatment and top coat.
Use it if you want, but I say it’s nothing but snake oil.
I had a car sandblasted and I painted it with POR 15. After 2 years it was rusting through.
The sandblasting probably had more to do with the rust coming through than the POR 15. Sandblasting can't possibly remove all traces of rust. The finest media cannot get into the finest pores and subsequently the rust just starts to grow again. A liquid rust remover/converter/inhibitor is by far the best method.
In the video he uses muriatic acid. While this stuff does an awesome job, the fumes are deadly so using it in any sort of volume or as a spray, etc. is virtually out of the question - not to mention what it does to you if you get ANY on you. I often use it to burn cad plating of parts I'm going to weld and I swear to God, the fumes alone burn my skin. And the other issue with muriatic id that once the parts are rinsed, and that's absolutely necessary, they will flash rust in minutes.
The advantage to most rust removers that are commercially available is that they don't need a rinse and will leave a protective phosphate coating which can be painted over or wiped off if you so desire.
if you believe that rust comes through the paint because there was still traces of rust after sandblasting, then you should know that POR stands for Paint Over Rust.