Usually the pans do not rust or need repairs.
Epoxy to replace rusted floor panels.
There are several ways to deal with a rusty floor.
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Replace rusty floor panels.
If the rust damage is extensive replacing the entire floor pan with a one piece panel is the best way.
If the hole isn t too big you can do a patch repair.
If the repair area is large you may need to mix the two part epoxy in stages to allow you time to apply the epoxy putty before it hardens.
Floor pans are the base metal layer of a vehicle s floor that everything else rests on.
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As would be the case in most situations the carpeting or floor covering will need to be removed to gain access to the rust effected portions of the vehicle floor.
This is most common for older cars.
I had a major rust problem in my 1989 mitsubishi montero ls v 6 four door and thought giving glue a chance would at worst demonstrate what not to do and at best bond some.
I weld in a new hand formed floor pan in my 1978 ford f150 truck.
We decided instead to treat the rusty metal with por 15 and then repair the small rust holes with the epoxy putty.
One of the best ways to patch the holes is with fiberglass.
However sometimes it is necessary to repair holes in the bottom of the floor pan.
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You need to mix enough two part epoxy putty to cover an area at least twice as large as the rust you need to repair.
Thanks to modern chemistry and manufacturing we now have two part epoxy panel adhesives that are strong and flexible enough to bond metals together more or less permanently.
Thoroughly mix equal parts of the two part epoxy putty.
Among its many products the latest from por 15 is a complete floorpan restoration kit offering a combination of the classic por 15 chemicals along with a sizeable offering of the two part epoxy putty and fiberglass mat material.