How do you waterproof a terrace?

A terrace can be easily waterproofed with a completely waterproof rubber membrane such as ALLESDICHT. Known as "the rubber membrane in a bucket", ALLESDICHT is a water-thinnable, solvent-free, skin-friendly putty based on finely ground rubber. When dry, it forms a permanently elastic and highly tear-resistant rubber layer. Ready to use, ALLESDICHT has a honey-like, viscous consistency. It can be applied to a variety of substrates including concrete, wood, bitumen and tiles by trowel, brush or spray. Joints and penetrations are easily sealed and can be reinforced with a fabric insert if required. ALLESDICHT is applied in two to three coats to form a highly elastic rubber membrane, at least 2mm thick, that reliably bridges cracks and remains watertight even when water is standing on it.