They are both suitable for waterproofing roofs, parapets, gutters, drywall, cement boards, as well as for the coating of well-adhered asphaltic roll roofing. WATERPROOF-500 and especially HYDROSTOP-PU are very easy to use. Three coats are enough to provide long-term protection. ΗYDROSTOP-PU Polyurethane waterproofer for flat roofs (p. 258) DOES NOT REQUIRE THE ADDITION OF REINFORCING POLYESTER MESH WATERPROOF 500 Two-component polyurea-based waterproofing coat for roofs (p. 272) Waterproof with the polyurethane HYDROSTOP-PU or the polyurea-based waterproofer WATERPROOF 500 of DUROSTICK LONG-TERM PROTECTION Watch additional information for rooftop waterproofing on our YouTube channel POLYURETHANE-BASED ROOF WATERPROOFER
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