Painting over Decorators Caulk

20 Oct 2015
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United Kingdom
I have recently papered a room and used decorators caulk to finish corners and just fill in some tiny gaps between sheets of paper. All left to dry for over 48 hours. I then painted using emulsion and have found crazy paving style cracks all around the caulk. I understand this is down to emulsion and I wanrt to know exactly which paint I can use to cover it before repainting with emulsion.

Thoughts are:

Eggshell oil based wood/metal paint.

Appreciate some help please
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The degree of crazing varies depending on the quality of emulsion and the brand/quality of the caulk.

I ordinarily use the Everbuild 125 caulk and Dulux Trade emulsion. I did recently use 125 and Dulux retail, it crazed. I applied a coat of Zinsser BIN and then coats of emulsion. BIN dries really fast and can be over painted after about half an hour. When working with BIN, use a throw away brush or household ammonia to clean the brush.

Oil based paints will work but if the emulsion is thin, you might get fish-eyes unless you wait ages for the solvents to be released form the oil based paint.

A good quality acrylic undercoat or eggshell will probably suffice as well.

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