Caparol Universal primer

Sticks like you can't believe. Sprays clean, lays down nicely and gives a uniform porosity to the substrate. Hatfgrund eg is great with brush and roller but really messy to spray. This answers both ares. I'm gonna guess at 10 to 20% thinning is best depending on pump power, heated hose, winter etc. 13 to 17 thou tip depending on area size flow rate required, 40 if cold 45 on the heated hose though clean without.