Ingredients ...

- 2 parts Elmer's Glue
- 1/4 part latex paint
- 1/4 part dirt

To coat a corpse torso wearing a shirt (or a dress if you're into that sort of thing) ...

Pour 2 cups of Elmer's glue into a bucket, mix in a handful of dirt and about 1/2 cup of latex paint.  Coat the entire body, clothes included.  Work it into the material, or saturate the material, then dress your corpse.   When the glue sets up, the material gets nice and stiff. 

This is a lot lighter than monster mud, and the result is a fairly stiff shell.  The tradeoff is that this won't be nearly as weatherproof as a monster mud creature.  That's what sealer is for.