The reason you use Emulsa Bond is that it is an emulsified alkyd/oil resin and give you penetration that a straight acrylic/latex will not give you over a chalky surface. It is used in primers and first coats as it is not needed in the finish coat and can give you shiners in the finish coat. If you have chalky paint on these shingles you either need to use an acrylic primer with Emulsa Bond added to it or an oil based masonry primer as if you do not you will have peeling paint down the road and that is not a fun situation to have and is nearly impossible to fix.
The reason I say to use a primer from the same company that makes the finish paint is because if there is a problem each company will say it is the others product that cuased it. There are some great problems out there from special situations that require extra adhesion but this is not one of them.
Hope this helps out. |
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