how to sand Kilz

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Old 02-12-09, 04:30 PM
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how to sand Kilz

Hello,

Just the short version - I need to sand off Kilz (2 latex) that has been on new sheetrock and mud for about 5 days. Kilz keeps clogging sandpaper. Since I've rented the sander and vacuum I'd like to make use of my money. What can I do to prevent clogging of sandpaper?

bamakodaker
 
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Old 02-12-09, 04:43 PM
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Why do you need to sand it off?

I know it's not a very good primer but latex primer/paints don't sand off of drywall very well.
 
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Old 02-12-09, 05:00 PM
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OK not the short version

I was trying to not admit my problem!

I was replacing dark paneling with sheetrock, my first time. I used a flashlight shining down the wall to see how I was doing after I sanded. Flashlight quit working just before I put on final coat of mud. Finished mud, sanded, painted and got a working flashlight - - - wished I'd seen how bad it looked BEFORE I painted it!!!

I just can NOT live with it looking like it does. I've got to get through the Kilz and sand off some more mud. TONIGHT!
Any help?

bamakodaker
 
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Old 02-12-09, 05:10 PM
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It would be easier to apply more j/c over the primer, sand the j/c and then reprime.

It's not uncommon to see a spot or two that needs more attention after the primer goes on - remudding is always the best plan of attack.
 
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Old 02-12-09, 05:18 PM
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mud

Question - can the mud be a bit overly dry if it is difficult to spread out thin and smooth?
 
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Old 02-12-09, 05:55 PM
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oops

forget the putting more mud over paint. We're talking about to much mud! It's to high and I really need to get it down. Adding more mud would be quite a chore!!
 
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Old 02-12-09, 09:04 PM
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Most likely, you won't be able to sand through the primer and then into the mud smoothly.

The mud underneath sands easier than the primer, this will cause kind of a tearing as you sand through the primer into the mud. You won't be able to feather that edge out, without mudding over it.

Try a seam or two and see if that is true.

If you have humps that need to be flattened out, you will probably need to sand the hump down, then re-mud the seam to get a smooth feathered joint.
 
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Old 02-12-09, 10:32 PM
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mud tear

Hello and thanks for the response -

I hadn't thought about that difference between the two. Makes sense though.

Wow - such a learning process I'm having with this!

bamakodaker
 
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Old 02-13-09, 05:08 AM
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Originally Posted by bamakodaker View Post
Question - can the mud be a bit overly dry if it is difficult to spread out thin and smooth?
I almost always thin the j/c a tad. it makes it spread and lay a little nicer. it doesn't take a lot of water, maybe a spoonfull or 2 in a mud pan.
 
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Old 02-13-09, 06:27 AM
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thin mud

Thanks for the tip!

Looks like I will try it. Blew about $85 renting sander/vacuum last night. I'll have to try a 4th layer of mud on top of the Kilz! Should I go buy something bigger than my 12 inch mud knife?

bamakodaker
 
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Old 02-13-09, 09:18 AM
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You can get a 14" knife but I'm not fond of them - they don't fit easily in the mud pan
As long as you pay attention and don't build up the mud too thick, your 12" knife should be fine.
 
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