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Hot Plaster

Posted by Mr. Paint on March 29th, 2003 03:34 PM
In reply to Hot Plaster?? by Sally on March 29th, 2003 12:16 PM [Go to top of thread]

1 of 2 people found this post helpful

Sally.....plaster - or masonry for that matter that is referred to as being "hot" means that it has a high PH. This is generally while the plaster/masonry is wet - by the time it cures, the Ph goes down and there is no problem.

"Hot" plaster can cause a "burn" - the alkalinity will react with the binder in paint and cause it to discolor - it almost looks like a burn - hence the term. Generally paint doesn't peel from a burn - just changes color.

Having said that - alkyd/alcohol based products like BIN can be harmed by high Ph. BIN was not the right product for your case.

I would install that new fan IN the bathrooom - and while you are at it - a new piece of drywall installed and primed with a good latex primer and two coats of latex semi-gloss should do the trick.

Sometimes it is easier to drywall over the problem - as long as the ceiling is sound.

As far as paint goes - Glidden Ultra-Hide Gripper is a great primer - and Glidden Evermore/Ultra-Hide/Ralph Lauren Semi-Gloss are all great finish coats. All are available at The Home Depot.

Mr. Paint

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Topic History:

Topic Follow-ups:

  • Also by Sally  3/29/03 06:11 PM
  • Hot Plaster by Mr. Paint  3/30/03 09:33 AM

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