... after test in Naoh 28days later, so that guarantee high strength, high tensility, light weight.3.Our fiberglass yarn is ... waterproofing, crack, etc..Performance:The product have good grid fixity, and high strength, good adhesion with cement mortar, excellent fitting ... 4Gpa, is can't reach by other chemical fibers. Coated Alkali-Resistant Fiberglass Mesh c glass blue color pvc glue high quality