USG Corp

A. Myron Ferguson, a drywall contractor in Broadalbin, N.Y., and the author of Drywall: Professional Techniques for Walls and Ceilings, responds: Companies that manufacture joint compounds actually offer a wide range of products, including taping and topping compounds as well as regular all-purpose compounds.

Taping compounds [1] are formulated to have excellent bonding strength and crack resistance for embedding paper tape. Topping compounds [2] that are formulated for fill and finish coats are lighter than taping compounds and not as strong, but they are less likely to shrink and are easier to apply and sand. All-purpose compounds ([3]) are the...

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