what can i use to seal pricks before plastering

Hi There Rather than using a damp proof sealer on the brick work, I would use sand and cement with a sika water proof additive, if you seal the bricks the plasterers will have no suction for there plaster to dry, as a damp proofing company this is what we would do but with our own water proofer, but for the lay man you can't go wrong with sika. regards Joseph