How to QUICKLY and EASILY plug holes in your PROJECT CAR

[@DoctoredGarage]

I drove the car for a few hours today - and I can confirm that this stuff works GREAT at sealing out the exhaust odors from cruising on the highway.

[@LateBrakingM3]

My cheap and cheezy method has been to use aluminum foil tape on the back side (rather than painter's tape), cut it out in circles a little bigger than the hole, and stick it on the underside. Then I'll use the black RTV on the other side. I just leave the aluminum foil tape in place and it leaves some semblance of a backing there.

[@DoctoredGarage]

Ooh that's a good one! I've had mixed results with the black RTV on my cars, but if it works for you that's awesome!

[@NinaYo401]

Fiberglass sheet and por15 works great. Krud Kutter beforehand and parts cleaner spray before paint.

[@DoctoredGarage]

I've had to chisel out fiberglass that people have added for stuff like this in the past, and I'm not a fan. If you're planning on just leaving it - that's probably ok just sucks for the next person if they want to put metal back in. But I prefer to just do something like this as a temporary repair, then go back in later to weld it shut. Or are you saying you just use the fiberglass sheet as a backing for the por15 with no epoxy?

[@NinaYo401]

@ cut to size, paint regular por15 on area, adhere fiberglass sheet, then paint another por15 coat. Definitely would be unfun to remove, but just use wisely

[@eleeter]

POR-15 Patch works great on RUST. Can't stress this enough it loves rust don't use it on clean metal in fact don't use any POR-15 product on clean or even mildly rusted metal it will peel off in a few years. For rust paint use Rust Bullet it's not UV reactive and adheres to rusted or clean metal.

[@DoctoredGarage]

That's a really good point. For normal Por-15 paint stuff there's always a bunch of prep work to do to make it stick.