Primer needed for small rust removal?

[deroll]

I need to fix some rust on the underbody. Nothing major and its some small patches around the jack point.

Where can I get the appropriate primer to use for this problem. I went to AceHW and I was told that the primer that they have wasn't appropriate and would not adhere well if used on cars.
Can I just use touch up paint over sanded down rust areas without primer?

 

[DanzEterna]

use the antirust paint, usually used by windscreen replace/repair shop. the paint its black color.

 

[deroll]

use the antirust paint, usually used by windscreen replace/repair shop. the paint its black color.

Does it have a brand? How does it look like?

 

[ken yeang]

use the dunlop brand underbody sealant....can be bought at hardware store.

Apply like thick paint. Can be diluted using thinner. Make sure surface is clean before painting.

This sealant is water resistant, withstand road debris, dampens (abit) car under-body noise.

 

[DanzEterna]

use the dunlop brand underbody sealant....can be bought at hardware store.

Apply like thick paint. Can be diluted using thinner. Make sure surface is clean before painting.

This sealant is water resistant, withstand road debris, dampens (abit) car under-body noise.

Ooo ya cvkit's thread right......