Used for preparing and improving adhesion of mineral substrates before applying mastics and sealants. Enhances bonding strength, ensuring reliable adhesion of waterproofing layers. Applied as a primer before both coating and membrane-type waterproofing, providing deep penetration and strengthening of the substrate surface. Standard: DSTU B V.2.7-79-98. Packaging type: plastic bucket. Advantages: — deep penetration into the substrate structure; — improved adhesion of waterproofing materials; — reduces surface dust and absorption; — quick drying and easy application.