slow drying epoxy floor paint

Last night I painted stoop landing with Benjamin Moore epoxy floor paint. It is still tucky today. (it leaves color mark on my finger when I press on the surface). Is it normal (it was 12 hours since I painted it)? It was colder over night and there was some sort of a rain. I also put a coat of concrete sealer 4 hours before appying the paint. How long will it take to cure? Another problem – I bough the paint last year and kept it in the basement. There is a posibility that the paint was frozen last winter.   Finally, what can be done if the paint is not curing at all? I understand, I screwed up, but what would be remedy? I do not want to paint over and I do not know how to apply the stripper to the concreete surface.

bobjohn

in Painters and Painting & Stripping 13 years and 6 months ago

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bobjohn | 13 years and 6 months ago

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came back from work and it is dry. I guess, it took a bit longer because of the cold weather. thanks for the answer.

greenmountain | 13 years and 6 months ago

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http://www.artscraftstheatersafety.org/newsletter.html For safety and health concerns about things we all buy in hardware stores, I rely on ACTS FACTS, see above.  The industrial hygienist who publishes that, Monona Rossol, also appears on NYC’s Lopate Show and wrote “Pick Your Poison” among other books.  Maybe not everything causes cancer, and we don’t always know what does, but we really do know never to touch epoxy while it is hardening.  Wear chemical resistant gloves.  Keep it off your skin and do not breath the odorless gas it gives off while hardening. Contact Benjamin Moore and ask to speak to a chemist.  I have done this and got lots of useful advice and explanations.  Epoxy does not dry.  It hardens by exothermic reaction.  The chemist may say none of their paints harden by drying.  Linseed, cotton seed, tung and many other vegetable oils “set” that is they polymerize when exposed to air.  They give off heat, not enough to notice when a thin paint film is applied to a large surface in a ventilated space, but enough to spontaneously combust when oily rags are balled up and tossed in a trash can, and more trash is piled on top.  Many houses have burned down this way.  If you (any reader) don’t believe me, do a little research; its real. Old epoxy catalyzes when the big can A is mixed with the little can B, but I hear some epoxies now catalyze when exposed to air.  I seldom use epoxies.  They usually don’t replace traditional, less dangerous products.  If your stoop paint is ever going to harden, it would have to be catalyed, and this, like linseed oil (and plaster, Portland cement, etc.) produces heat.  The heat in turn, accelerates the reaction.  Maybe you didn’t follow instructions, but if you did properly mix the parts, it will take longer to harden in cool weather (instructions will indicate what is the minimum allowable air temperature) and longer still to harden on huge blocks of stone, which draw heat out of the paint. Good luck.