Factory Under Coat

What is the closet undercoat to original that can be purchased?
Doing the under sides of my 70 Charger fenders.

Thank You
Frank

Good stuff.

http://www.restorick.com/

Good advice. I used Restorick's undercoating on my 70. I was able to duplicate the texture and look of the original stuff by playing with air pressure, spray pattern, distance etc using the Dutz spay gun. It touched up the damaged original undercoating nicely and looks original.

This stuff!

I have had mine on for seven years, still looking great and holding up well.

Thanks Guys
I'm on the home stretch to paint and will definitely look at Resto Rick