They come in 3-4 sizes, about half gallon, one gallon, 2 gallon and 5 gallon.
Sheetrock is primarily gypsum, combined with sand and water.
Drywall mud is the thick, goopy white stuff you use to fill the seams between boards.
This could be caused by the drywall being damp. But you also shouldn't have any spackling compound there, - it should be drywall mud.
There is no drywall glue. -If you are referring to mud (drywall compound), you scrape the lumps off at the end of each day and then wash your clothes. It always comes off.
when you hang drywall, you have to tape off the seams with paper tape and "mud", then "float" the mud smooth. the drywall float is a flat metal tool on a handle that you drag across the mud to smooth it out, like when you smooth out the icing on a cake
Nothing
Mix mud with sand to get a dry mud. Then use a bucket. Fill the bucket up with the mud mix, and then turn the bucket up-side-down and hit the top. Finally squeeze the bucket a little, and then pull it up. The mud should come out of the bucket, and then decorate the mud mould with leaves, add shape, and even build a mote.
I use basic drywall primer over all of those.
One bucket will do for many sheets. It depends on how good the installers were and what tape you use. Mesh tape is better in my opinion,but does take more mud. - That's a small consideration for the better finish it will give.
Yes, mud is a compound .
lightly wipe the drywall mud after it drys
You don't put 'spackle' on at all. After taping the drywall seams you 'mud' them with drywall compound. -It is a totally different substance from 'spackle', which should be used only to fill small holes and irregularities in wall.