Hi folks.  Have been using Dulux 1 step acrylic Primer / Sealer / Undercoat on recent renovations - mainly plasterboard and taped/ stopped joins. I then plan to use a water based acrylic on top.

I've been told by a large chain retailer that I need to use the oild based 1 step primer / sealer /undercoat for the bathroom walls and roof prior to my topcoat.   However on the can it says we should also use an oil based topcoat which I don't want to do. I want to use an acrylic kitchen and bathroom paint.

I pointed this out to the salesguy and he 'thought' we could use the water based acrylic on top of 1 step oil primer.  He went away and asked somebody else and they also ' thought' we could use it but weren't absolutely sure. 

Any painters or knowledgeable folks on here can help?  IF the topcoat - bathroom acrylic stops moisture ingress then does it really matter if the undercoat is oil or water based?

Thanks for your help

 

Ged