Historical: Drywall Joint Compound - 2015
This information reflects our best understanding of product composition in 2015.
Drywall joint compound is used, along with drywall joint tape, to fill the seams between drywall panels. It is also used to cover fastener heads and patch damage to drywall panels in order to create a smooth, uniform surface on walls and ceilings...
Drywall joint compound is used, along with drywall joint tape, to fill the seams between drywall panels. It is also used to cover fastener heads and patch damage to drywall panels in order to create a smooth, uniform surface on walls and ceilings. There are two types of joint compound: setting type and drying type. Setting type (hot mud) is supplied as a powder and mixed with water on site. It is a reactive plaster which limits the application time but decreases the time between coats. Drying type is most usually supplied in "Ready-Mix" form, where it is already combined with water and must only be mixed prior to application. This ready-mix, drying type of joint compound appears to be the most commonly used so is presented in this CP. There are also many variations in the ready-mix category: all-purpose standard weight, light-weight, mid-weight, taping compound, topping compound, etc. This CP is primarily focused on the all-purpose standard compound.
A more up to date CP is available here: https://pharos.habitablefuture.org/common-products/2077827.