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.

Is this good for plaster walls and plaster corners?

I used it for drywall an corners. Worked very well. I would use it to repair plaster too.

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

Product ID: 296616128

Details

Brand
U S GYPSUM
Item dimensions L x W x H
50.8 x 25.4 x
Item weight
8.17 kg
Material
Resin
Style
Compact

⏳Sets in 85-130 minutes

💨Sands easily for ultra-smooth finish

⚖️25% lighter than conventional compounds

Description

⚡ Elevate your drywall game with USG’s EZ Sand 90 – fast, light, flawless!

HUMIDITY RESISTANT - Built to withstand moisture, perfect for interior and exterior drywall projects.
FAST SETTING FORMULA - Get the job done quicker with a reliable 85-130 minute set time—no more waiting around.
LIGHTWEIGHT HANDLING - Weighs 25% less than traditional compounds, making mixing and application effortless.
SMOOTH FINISH EVERY TIME - Sands as easily as ready-mixed compounds for flawless drywall and ceiling surfaces.
SUPERIOR BOND LOW SHRINKAGE - Ensures durable laminating and patching with minimal cracking or shrinking.

US GYPSUM EZ Sand 90 Joint Compound is an 18-pound, lightweight, fast-setting drywall compound designed for both interior and exterior gypsum surfaces. It sets in 85-130 minutes, sands easily for a smooth finish, and offers superior bonding with low shrinkage. Its humidity resistance and 25% lighter weight than conventional compounds make it a top choice for professional-grade drywall repair and finishing.

Specifications

ASIN	B000H5O7SO
ASIN	B000H5O7SO
Best Sellers Rank	#116,816 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #393 in House Paint
Brand Name	U S GYPSUM
Color	colorless
Compatible Material	Concrete
Date First Available	10 August 2012
Global Trade Identification Number	00081099000171
Included Components	US GYPSUM 384211120 384211 EZ SAND 90 JOINT COMPOUND 18#
Is Discontinued By Manufacturer	No
Item Dimensions	50.8 x 25.4 x 8.9 centimeters
Item Form	Powder
Item Type Name	Us Gypsum 384211120 384211 Ez Sand 90 Joint Compound 18#
Item Weight	18 Pounds
Item model number	384211120
Manufacturer	US GYPSUM
Manufacturer	US GYPSUM
Material Type	Resin
Model	384211120
Number of Items	1
Number of Packs	1
Part Number	384211120
Product Dimensions	50.8 x 25.4 x 8.89 cm; 8.16 kg
Style Name	Compact
Supported Standards	ASTM C475
Surface Recommendation	Drywall
UPC	081099000171
Unit Count	288 Grams
Water Resistance Level	Water Resistant

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