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Question DetailsAsked on 6/22/2017

My house has James Hardie cement siding. Do I need special paint when i repaint it?Also, what is acrylic paint?

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Needs to be primed if not factory primed or previously painted as yours evidently is. There are also supposed primer/cover in one coat paints for concrete siding - I don't think much of what I have seen of the results though.

Properly primed cement siding can take either concrete paints (which tend to be quite thick) or a good exterior acrylic latex or (tougher cleanup and handling) an exterior acrylic enamel, same as many other sidings. Check the can label for whether it is rated for concrete siding - my personal recommendation (with good condition 25 year old Weatherbeater Deluxe acrylic latex on my wood house) would be the Sears/KMart Weatherbeater line of primer and acrylic latex paints (made by Sherwin Williams - available under different SW brand specific names at Sherwin Williams distributors too), and the trim paint in same line and color for window/door trim and such. Two finish coats for new (not previously painted) siding - I recommend first coat with the planks laid out on sawhorses, second coat after it is put up, to give better coverage on the ends and edges. (My opinion on all sidings - do NOT paint the back - should be able to breathe to dissipate any moisture).

Acrylic paint uses acrylic polymers as binders - gives a paint that expands and contracts with the substrate much better, and tougher paint overall and bonds better - these days I don't think you will find a straight latex only exterior paint (though some cheaper interior paint are straight latex) - exterior paints tend to be acrylic latex blend (the latex gives the waterproof characteristics) or acrylic enamels which are tougher and more color fast yet but once they start to wear flake off worse, in big sheets at times - normally used on non-porous materials like metals and fiberglass and vinyl rather than wood or concrete - used commonly on thingslike lawn furniture and swing sets and appliances and such. Actually, most "latex" paint these days is mostly acrylic or vinyl or resin polymer based, and many haveno latex rubber at all. Straight acrylic paint is used as art paint and for some interior uses like faux painting, but is not waterproof so not used to any extent (since about 60's, in my experience) as a general house paint.

Answered 3 years ago by LCD

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