When you buy joint compound, you purchase several pounds at once. It’s also used to cover any nail holes or blemishes, so there’s a smooth surface ready for the first coat of paint or primer. You put the tape on the seams where two pieces of drywall meet. If you’re not familiar with drywall, check out this article. You can also use it to create textures on a wall. You might be thinking, “that’s nice, but what do I use joint compound for?” All of the above types of joint compound are used to smooth the surface of drywall just before painting. Special joint compounds: These exist for fireproof drywall, low-dust drywall, and mold resistance.It’s not as easy to sand and shrinks more. All-Purpose Compound: This is premixed and can be used for any layer in the drywall process.Because the reaction produces heat, this kind is also known as “hot mud.” It uses a chemical reaction to set quickly. Setting Type: You should mix it right before use.It’s prone to shrinking and cracking as it dries. Drying Type: It comes ready to use and air dries over a long period.Some joint compounds come as a powder, and you can add water and mix it yourself. Joint compound is water, limestone, perlite, polymers, and a few additives.
When you mix joint compound, you know you have the right consistency if it’s spreadable like cream cheese. You could stand a stick up in it but still pull the stick out easily. Joint compound is also known as “mud” because it’s about the same consistency.
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