Indwangu ye-fiberglass mesh yenziwe ngentambo yengilazi ye-alkali emaphakathi noma engeyona eye-alkali futhi yambozwa nge-emulsion ye-polymer engazweli kwe-alkali.Ukusetshenziswa kwamagridi kuhlobene kakhulu nemboni yokukhangisa, futhi izindawo ezihilelekile zisetshenziselwa ukukhangisa ezindongeni eziphakeme kakhulu.