Hot Mud And Tools

Frankawitz

All I know is that the reason it's called hotmud by some folks is because it gets HOT. If you put a glob of it in a pile and let it sit then put your hand above it you will feel the heat just like Plaster, when I cast a cornice moulding then as it sets up you can watch the steam come off it.

boman47k

Let me see if I have the terminology right. Setting compound and hot mud are one and the same right? I may get some and just try it in the shop. Really concerned about it starting to set up toward the end of its drying time. Sounds like maybe if using 90, you may want to be finished in 30/40, clean tools real quick and do next coat, clean tools and apply top coat of premix.

Greg Di

Use it once and you'll never NOT use it again!

For the first time, you want to have three buckets. 1 for mixing, 1 for clean water supply, 1 for cleanup. DON'T DUMP the DIRTY WATER/SLUDGE down the drain unless you have Rotorooter's number on speedial!

Use 90 the first time and mix it a little loose. You'll know when your time is up because once the setting starts, it gets hard exponentially faster. Once you get used to it, you'll be mixing your own proprietary blends with hot water depending on the task.

You can also wet sand hot mud easily with a sponge while it's pliable if need be. I generally only sand the third coat which will be premix, but on a patch in the middle of someone's living room, they'll love you if you can patch it with zero dust, in which case I like hotmud for all three coats.

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boman47k

Ditto if I can get the hang of it and get 3 coats in one visit.

1KingOfDrywall

I have a kid we use in the summertime who takes all oyr machine tools to the car wash after work everyday in the summertime. He needs a few extra bucks,I found something for him to do. you can drop of your bucket at my house, your knives will be spotless by morning.......PS.....he's kinds like "a waterboy".....lol

steve336

When ever I use durabond 90 it sets up on me maybe more like 10 -15 mins. The only way i can use it is if I mix it into premixed compound .

Mike Finley

You got lime in your water or something?

You know to use cold water and clean water every time right? If you use any water that has any of the durabond in it, like your wash water for your knives the chemicals from the durabond are already setting in that water and will shorten your working time.

If I want to turn 90 into 5 minute I use hot water, it speeds up the chemical reactions going on.

steve336

I must not be getting everything 100% clean then. I have been using cold water. Are you mixing the an entire bag in one shot?

Mike Finley

All depends on what we are doing, I mix whatever amount is needed for the job at hand, sometimes it's an entire bag in a bucket using a mixer, sometimes it's a cup full in a pan mixed by hand.

steve336

I'll give it another try this week , thx for the quick response.

Mike Finley

Hey, by the way, I don't get it setting up on me 10-15 minutes, but 90, 45... ect... those numbers don't seem to have much reality in connection to working times. There is no way in hell 90 is workable even approaching 30 minutes, let alone an hour and a half!

I was under the impression maybe those numbers had more to do with total setting time. The 90 seems to take a lot longer to completely dry then 45 or 10.

boman47k

thats what I was talking about! So it seems if I tried a whole house or maybe even a room, I would be stopping a lot to clean tools and mixing more mud. Don't know how fast you guys are, but I cannot do a room in 30 min's.

Mike Finley

Maybe not, but I bet you can apply a bag of mud in 30 minutes, and that's really all it's about. I know for me it's not hard to apply a bag of setting compound in 15 minutes or less when it's the first coat. I usually use the 90 for the first coat and the 90 or 45 for the second.

You don't need to stop and clean tools if you use a bucket of water with a big sponge while you work, at the end of a bag of compound, we just scrape and sponge off the tools a bit and throw them all in the bucket of water and mix up the next bag, pull the tools out and sponge them off clean and keep going. The sponge is your friend, remember that... wipe off the setting compound that is drying around the inside of your bucket of compound, keep the cleaning the bucket insides as the level of compound keeps going down and when it's time to mix another bag in there you will be fine.

steve336

Worked like a charm today got all my inside and outside corners set with durabond . Everything needs to be a 100% cleaned in-between batches . This should speed the job along nicely!!

Danahy

Started using hot mud this past week as part of a regular regiment. Not that I didn't use it before, but just rarely. The house is a 100 yr old heritage home, tons of plaster, tons of cracks so it worked out great.

Instead of the bucket, I just half filled a half a dozen medium sized heavy duty zip-loc bags. Added water, zipped it up, kneeded it, shook it, razor'd the top, and squeezed out as necessary. Then chuck the zip-loc bag, then grab a new batch and repeat. a small tub of water for washing the knives off worked out good too.

All in all, pretty happy with the results, tks.