1 Answer

SHEETROCK Brand MH Setting-Type Joint Compounds are designed for the time-sensitive requirements of industrialized construction. They produce crack-resistant joints on walls and ceilings and excellent check-crack resistance in heavy fills. They mix easily, dry quickly, and deliver an exceptionally strong bond with low shrinkage, resulting in flatter joints.

The compounds are available in two formulations: SHEETROCK Brand MH Tuf-Set™ High Early Strength (HES) Setting-Type Joint Compound and SHEETROCK Brand MH Tuf-Set Setting-Type Joint Compound. When applied over SHEETROCK Brand MH Tuf-Tape™ Joint Tape, they provide excellent joint strength and crack-resistance.

SHEETROCK Brand MH Tuf-Set HES Setting-Type Joint Compound develops 40 to 50-percent more joint strength than regular hardening compounds.
SHEETROCK Brand MH Tuf-Set Setting-Type Compound produces as solid and strong a joint in just two coats as regular SHEETROCK Brand Setting-Type Joint Compound and regular SHEETROCK Brand Joint Tape provide in three when applied over SHEETROCK Brand MH Tuf-Tape or IMPERIAL® Tape Type P.
- See more at: http://www.usg.com/sheetrock-mh-joint-compound.html#sthash.FV1y65ry.dpuf 

https://www.google.com/search?q=what+is+the+compound+MH&rlz=1C1LENN_enUS508US508&oq=what+is+the+compound+MH&aqs=chrome..69i57j69i60.1440j0&sourceid=chrome&ie=UTF-8