To give better filtration properties to filtration fabric, a penetrating ability should be achieved included air permeability. Water permeability and penetratingproperty.
要使滤布有很好的过滤性能，就必须具有良好的透通性，即透气性、透水性及渗透性。
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Antirux ors203is an oily-type rust preventive possessing excellent water-displacing and penetratingproperty it forms an tacky oil film which remains water-proof and self-sealing over long periods.
The water penetrating into concrete may bring in a lot of harmful ions(for example chlorine ion), which has a harmful effect on concrete property and may brings into reinforcement in concrete to rust.