Of note, that stuff works great, but you need to be very sparing with it, as it very difficult to sand compared to the premixed stuff. Make sure you have it as close to the way you want it to look as you are able before you let it dry. A lot of drywallers use this stuff for pre-filling poor, uneven drywall board work before taping, as it is very hard stuff. But it can take a lot longer to dry that way than the bag would suggest. Sheetrock 90 turned into Sheetrock Maybe Tomorrow in my kitchen reno after I used it to replace sections along the edges of some damaged drywall that tore out when I removed the old tile backsplash.