Fighting Rust Part 2 (The Arch-nemesis) on 2010 Mazda 6 GH

[@kkvitek7052]

My wheel arch looked the same. I used epoxy to patch the hole. But before I applied the epoxy I used a rust inhibitor. And I used 2k pepoxy, not 1k, 2k is much better. I recommend covering the entire car with foil, even when painting the wheel arches, if you don't want epoxy dust on the paint.

[@KlavsX_]

You went 2 steps ahead I see. Yeah, 2 k epoxy is good product to use. I want to see first how far it goes. If it's a small patch then 100% epoxy.

[@lmr9512]

how long does that undersealant last

[@KlavsX_]

From my experience, 4 years, but I sold the car, so it might be even going strong now. They do claim lifetime of the car, but I doubt that

[@dragobalboa7531]

That was a big mistake. You shouldn't have used that black stuff. Now that it dries, it will crack. Moisture will seep through the cracks and really start to rust. To stop and smother the rust once and for all, you should have used rope grease, owatrol or fluid film. Something oil or grease based.

[@wesleys94]

Thanks for the tip mate... I'll do the same on my car

[@KlavsX_]

Good tip but sadly it's not for long term. Biggest problems with grease or oil based coats, they disintegrate far to fast. Have you tried the black half rubberized underbody coating? In the 5 years I owned my old BMW haven't seen a single crack or split in the undercoat. Genuinely interested why you dislike it!

[@dragobalboa7531]

@@KlavsX_ You don't use black rubber material to preserve rust. Now you won't even see how it continues to rust underneath thr black rubber. You don't seem to be up to date when it comes to rust. The current state of the art is to preserve rust only with adhesive oils or greases.

[@KlavsX_]

I would recommend that you re-watch the video. Looks like you got the wrong idea, of what this video is about. ( the black coating is protecting the primer, not the rust)