Seal rusty container

[stoffe88]

I have a 20-foot factory-insulated container that is heavily rusted. On the roof, I have a 50x50mm rust hole and also longer tears in the roof/wall transition that have holes. I would have liked to weld the holes shut but don’t want to risk it catching fire

Almost the entire long side is full of holes, up to 20mm in size.

Solution for the roof: I thought about gluing a new sheet over the large hole but what to do with the long side? Considering screwing a new sheet over the entire side, but how do you seal it nicely at the ends/top?

Tips on primer in larger quantities?

 

[Qlram]

Zinc-rich epoxy 2k paint as a primer. It fixes everything.

 

[stoffe88]

2k epoxy sounds expensive? Any specific manufacturer I should look for?

Is Biltema's rostskyddsprimer good enough?

Resin-based rust protection primer with zinc, for most metals. Dries in 8–12 hours (depending on temperature) and provides a primed surface ready for overpainting. NOTE! Must not be overpainted with paint containing acetone, cellulose, or polyurethane. Gray.

 

[Qlram]

I just saw that Hagmans has a spray-on version. Which is convenient. 90% zinc in it is good. It takes a long time for rust to come through.

 

[stoffe88]

I was thinking of such a large amount that, for example, you could paint the ceiling (20m2), and that would probably come with quite a hefty cost, but the idea with 2k epoxy is definitely a good one.

 

[Qlram]

I repainted my metal roof this summer with Hagmans roofing paint. A water-based primer with a bit of zinc in it and an acrylic top coat. Seems good so far. The primer was available in liter packaging and the topcoat was probably at least 5 liters. Might be an alternative. Otherwise, most manufacturers have good primers with good rust protection.