Reparatiemortel 15kg HplusH Ronde Blokken An Aerated Concrete Lintel of Strength class:G4 An Aerated Concrete Lintel of 2 meters Dilute the Knauf Stuc Primer with clean tap water it is advisable to follow the instructions on the packaging Surface damage and holes in walls of aerated concrete blocks can be easily repaired with H+H repair mortar