... for basement,kitchen,bathroom,underground tunnel.· Leak-proofing and penetrating-proofing of Reservoirs,water towers,swimming-pool,· ... grease, frost, water, dirt, old sealants and any protective coating. Dust and loose particles should be cleaned. 6. APPLICATION ... substrate should be smooth, solid, clean, dry without sharp concave and convex points, honeycomb, pocking marks, peeling, free of bulges, ...