How much mud does this actually make?

I don't know exactly. It makes a lot, but it dependes on how you are using it. If you are texturing a large room, you will ned three or four bags, or more. For patching, this will do most of what would be needed in a renovation. It's wonderful material!

How long before I can paint a patch I used it for?

I have checked after 90 minutes post application, but it was not dry enough for painting. 90 minutes is the minimal time and it is dependent on how much and how thick you had to apply of the joint compound. I usually waited 24 hrs. to be assured that it was completely dry.

What can make the so called 90 set up in about 5 minutes? Hard could barely clean my tools. So inconsistent in the same bag? Small batches too

Very important to keep the big bag dry, so powder would not solidify prematurely. Also important to keep the tools wet, so you can clean. Dipping tools in pail of water helps but work quickly for best result. Otherwise you'll have unusable clumpy/solid powder in the bag, and uncleanable tools.

ASIN	B000H5O7SO
ASIN	B000H5O7SO
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#131,574 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #503 in House Paint
Color	colorless
Date First Available	10 August 2012
Date First Available	10 August 2012
Included components	US GYPSUM 384211120 384211 EZ SAND 90 JOINT COMPOUND 18#
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	8.16 Kilograms
Item model number	384211120
Item model number	384211120
Manufacturer	US GYPSUM
Manufacturer	US GYPSUM
Material	Resin
Number of Handles	1
Part number	384211120
Product Dimensions	50.8 x 25.4 x 8.89 cm; 8.16 kg
Product Dimensions	50.8 x 25.4 x 8.89 cm; 8.16 kg
Style	Compact
light-source-type	Compact Fluorescent Light (CFL)

US GYPSUM USG-384211-18lbs 384211120 384211 Ez Sand 90 Joint Compound 18#, No Color, 18 Pounds

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