SIKA MB PRIMER
We always use this when sticking solid boards to a screed. Not only does it have damp proofing properties, but it also consolidates the top of the screed. One No 5kg set will cover approximately 10 m sq. When dry, it leaves a surface ready to stick flooring direct to the sub-floor with no need for battens. We also use this product with engineered boards if we have doubts about the moisture content of a screed.