Mar-Flex Waterproofing and Building Materials has the solution to your poured wall waterproofing needs. Fusion UV Water Based Polymer™ is a new spray on virgin polymer waterproofing membrane. Fusion UV™ can be applied to any poured foundation wall and resists freeze-thaw cycles for ease of use. Fusion UV™ has been designed for the average consumer to readily apply. Fusion UV™ is available in UV resistant gray.