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

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

Product ID: 17958777

Details

Brand
U S GYPSUM
Item Weight
18 pounds
Item dimensions L x W x H
20 x 10 x 3.5
Material
Plastic
Style
Compact

💧Waterproof for durable finishes

⚖️18 lbs lightweight bag

🛠️ASTM C475 certified for quality

Description

⚡️ Smooth. Strong. Seamless. The only joint compound you’ll ever need.

WATERPROOF FORMULA - Built to resist moisture, delivering a flawless finish that stands the test of time and humidity.
LONG LASTING SUPPLY - Generous 18-pound volume means fewer trips to the store and more uninterrupted project flow.
PRO GRADE DURABILITY - ASTM C475 certification ensures industry-standard quality and reliable performance on drywall and exterior ceiling boards.
VERSATILE COMPATIBILITY - Perfectly suited for drywall, concrete, and ceiling boards, making it your go-to compound for all interior and exterior repairs.
EFFORTLESS MIXING APPLICATION - Lightweight 18 lb bag designed for easy handling and smooth finishing, saving your energy for what matters.

US Gypsum’s 18-pound EZ Sand 90 Joint Compound is a lightweight, waterproof drywall compound certified to ASTM C475 standards. Ideal for both interior drywall and exterior ceiling boards, it offers easy mixing, smooth finishing, and long-lasting durability, making it a trusted choice for professional-grade wall repairs.

Specifications

ASIN	B000H5O7SO
Best Sellers Rank	#237,411 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #622 in Wall Surface Repair Products
Brand Name	U S GYPSUM
Color	No Color
Compatible Material	Concrete
Customer Reviews	4.7 4.7 out of 5 stars (157)
Global Trade Identification Number	00081099000171
Included Components	US GYPSUM 384211120 384211 EZ SAND 90 JOINT COMPOUND 18#
Item Dimensions	20 x 10 x 3.5 inches
Item Form	Paste
Item Type Name	Us Gypsum 384211120 384211 Ez Sand 90 Joint Compound 18#
Item Weight	18 pounds
Manufacturer	US GYPSUM
Material Type	Plastic
Model	384211120
Number of Items	1
Part Number	384211120
Style Name	Compact
Supported Standards	ASTM C475
Surface Recommendation	Drywall
UPC	081099000171
Unit Count	288 Ounce
Warranty Description	Warranty
Water Resistance Level	Waterproof

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