This might be good but I don't know because I didn't use it under the Marco Polo paint. It is more a sealer than a primer and it's very liquid and no grains in it ! I bought it per recomandations to the sales person but I end up using Marcotherm as a primer !

Used twice under San Marco lime paint. One was on rough structolite (usg gypsum plaster) walls, and second on smooth sheetrock. Both worked well. As usual with Decora products, I get a lot more coverage than the literature suggests, making them far more economical.

Easy to use. Worked perfect with Marcopolo

Nice product 👌

All the products we used were terrific and easy to use with great results. So pleased and will use this product again