Undercoat question.....

[ND 4 SPD SHO]

I was pondering the other day and came up with this thought....

There hasn't been one undercoat that I've seen that was durable to last more then a year and not need touching up. What if that rubber stuff that's used in pickup truck beds(ie Duraliner or whatever it's called) would be used as undercoat? Applied carefully of course to keep off of parts of the car that it would potentially be in the way.

Has anybody ever done/tried this? What are your thoughts, comments, concerns, etc etc?

 

[Dave Ladely]

good idea.
Clean it good first. After cleaning, an alternative would be black epoxy primer or the epoxy used for garage floors (dark grey). Super tough, protects against rust, not likely to chip off, doesn't absorb water. That asphalt crap tended to absorb water, salt, etc, and come off.

 

[edmontonsho]

isn't that stuff heavy. I think the last thing a SHO needs is 50 pounds of undercoating. but if it stops deterioration from the under side, it might be worth it.

 

[Dave Ladely]

The rubbery stuff is heavy in thick coats, but need not be applied that thick for an undercoat, no more than 1/16" to be effective. The epoxy would be very light weight.

 

[Blast7]

What is a good undercoating to buy? I need to gear up for the winter.

 

[herman]

I would be careful Duraliner. It would probably be too thick and create some air bubbles. It might sound stupid, but under the car, the paint is hanging, not lieing, therefor air bubbles can appear if coating is thick. Air bubbles contains moistrue - and rust continues. A much better approach is POR-15 underbody paint. It will stop your rust permanently. It has the correct viscousity for easy apply.

The only prework you have to do is:
1. Clean off all salt, grime, oil, grease, old undercoating and wire weel loose rust
2. Let car dry for 3-6 days - VERY IMPORTANT

Then apply POR15

POR15 recommends use of metal "edger" before painting, but yuo dont have to if you have wire wheeled well. I have used the product for years, and this works!

Where can you get POR15:

http://porcan.com/ (US)

http://www.por15canada.com/ (CDN)