Undercoating Tubs

So after you took all the time and effort to weld in tubs for your dubs or larger, what type of undercoating did you coat the underside of them with? I seam sealed all of the welds to prevent rust and I also want to keep the noise down on the inside of the cabin. I was thinking of using some sort of Rhino Liner, would it work okay or do I need to use some sort of actual undercoat?

I used SEMs bed liner on the firewall,undercab & tubs on my truck. its a cheaper version of rhino liner but it works just as good, i tried a long time ago to used the mar hyde spray undercoating from advance auto & it took about 4 days to dry & did really work all that good, but yes the bed liner stuff works good or at least it has for me

On the top side in the engine bay,Line -X & used Herculiner in the bed,underside of all all welds seam sealer & than sprayed with rubberized undercoat.:BEERCHUG: