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Old 07-30-2017, 01:23 PM   #1
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Default BM 508 too thin?

I just painted a large ceiling (7' wide at one end, 19' at the other and 28 feet deep) with 508. I had primed it with 123 to see the dings, then pointed it up twice, then Gardzed it (I applied extra Gardz wherever I saw flashing) and let dry. I cut the 508 in twice with a 4" mini, then let set overnight.

Next day I rolled a coat of 508 onto ceiling. It dried very uniformly, but did not cover in one coat. The paint I used was from a can half full, which I shook up by hand before pouring into tray. Towards the end I had to break open the 2nd can and pour a little bit in to finish the ceiling. Afterwards I put the roller into a zip lock baggy and returned the paint in the pan to the can, which filled almost to the brim. The paint had been sitting on site for about a month.

After a couple of hours I rolled a second coat onto the ceiling. Since the 2nd can was completely full, I did not shake it by hand, nor did I stir it with a stick (the directions, which I read later, said to stir the paint thoroughly before and during painting, so I am now in the same club as Woodco is with Gardz - karma!), I just poured the 508 right into the pan and started rolling. The paint was now very drippy and was spattering more than normal. I had to hurry to get the roller from the pan to the ceiling before paint would start dripping down like a roller cover overloaded with Gardz! I have never had this happen before with 508 or any other paint I can think of, just Gardz.

I found that the 2nd coat left uneven roller lines where the paint had started to dry before I could roll the next section.

I was using a 5/16" Wooster Microplush. I realize that this is too short of a nap for ceilings, but the GC originally had me doing everything, walls and ceilings, with a 1/4" nap. I at least was able to bump him up to the 5/16".

I realize that I did not read and follow the directions to stir the paint before and during. Most of the time when I go to stir paint, there is no settling on the bottom and I end up thinking that I did not even need to stir it. Not anymore!

I also realize that I need to use a thicker nap roller. I discussed all this with the BM clerk. He sold me a 1/2" corona cover that he said was the densest cover he had. I bought a new gallon of 508 and left for the job. As I was carrying the can of 508 I could feel it moving up and down as well as hear it making the metal can make a popping noise every time I raised and lowered the can, leading me to believe that the paint inside must be thinner than usual.

When I got to the job, I opened the can up and went to stir it to check out the consistency. It was VERY THIN compared to what I remember other 508 jobs had been. I had the BM Extender and was ready to add a cup to the gallon to extend the dry time, but I told the GC that I thought that the paint was too thin and that I thought I was just going to get a rerun of what I had experienced rolling the 2nd coat a few days earlier.

Is it possible that I got some bad 508? Is ceiling paint supposed to be thin?
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Old 07-30-2017, 02:22 PM   #2
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508 is definitely thicker ceiling paint than most I've ever used. If that stuff had been sitting onsite for a month, I'd consider taking it back to the shop and have them reshake it for you. I have to imagine that might have something to do with the problem you had. I've never had a can of 508 that I thought was thin.
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Old 07-30-2017, 10:10 PM   #3
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Default Thick or thin?

Quote:
Originally Posted by Wildbill7145 View Post
508 is definitely thicker ceiling paint than most I've ever used. If that stuff had been sitting onsite for a month, I'd consider taking it back to the shop and have them reshake it for you. I have to imagine that might have something to do with the problem you had. I've never had a can of 508 that I thought was thin.
I thought I remember it being thicker. The GC bought all the paint about a month ago at a chain paint store. The paint I bought a few days ago was from the same chain, just different town. Both batches seem really thin, so much so that if I had added water to make it that thin, I would hvae thought I added too much.

The paint I just bought was shaken thoroughly. When I got to the site, I opened the can up and stirred it with a stick, scraping the bottom and bringing it up to see if any sludge was on it. None. Just thin paint!

Wildbill7145, I appreciate you observation. I thought I was having some mental problems. I have known that the 508 will spatter, but dripping off the roller is not something I have experienced until the 2nd coat on this last ceiling I rolled.

I am of a mind to find a white primer that matches the 508 so I can make sure the ceiling is white-white first, then roll only one coat of 508 on. I never seem to be able to get the 2nd coat on as good as the first.

I gues I will have to take the gallon I bought back to the store and see what is going on.


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Last edited by futtyos; 07-30-2017 at 10:13 PM..
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