Sika MonoTop®-109 WaterProofing is a one-component, ready-to-use waterproofing mortar with a well-designed consistency for brush application.One ingredient, just add waterGood adhesion to many substratesEasy and fast application with a brushSika MonoTop®-109 WaterProofing is specially designed for sealing and protecting foundations, basement walls or pre-embankment structures, elevator shafts, water tanks, etc.