MasterEmaco SBR 2. • Using a stiff brush, work the bonding slurry well into the damp surface. When the bond coat is tacky apply mortar/screed overlay. As waterproofing slurry: • Mix 2 parts cement to 1 part MasterEmaco SBR 2 by weight of cement. • • Mix to a lumpfree creamy, consistency for 23 minutes by slowly adding MasterEmaco SBR 2.