... About usSichuan OUK building materials science and technology Co., Ltd. is an enterprise which combines science, industry and ... has the features of heat insulation, sound insulation, acid -resisting,alkali-resisting,fire-proof,non-discoloring,non ... crackNon-alkali resistant and non-acid resistantAging,fragile,wind crackAlkali resistant and acid resistantEnvironment friendlyThin,sound insulation is ...