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Originally Posted by gaz4266 how do u mean pre-primed, like acrylic paste. You still need to prime especially plaster, because it is highly absorbent, and it will draw moisture from the product , waterbased or acrylic
But really for all it takes no way i wouldn't prime plaster or plasterboard
better to be safe than sorry, I always prime with a SBR bonding agent |
Technically an SBR primer is for slurry priming concrete floors and sealing the edges and back of wood substrates before tiling.
For priming gypsum plaster walls or plasterboard you should be using an APD primer. (Read BAL's techinicaly literature for a chemical explanation on why this is).