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 Protection against drainage board has established the rough hollow bar structure, you can export the water quickly and efficiently, greatly reduce or even eliminate the hydrostatic pressure waterproof layer, hydraulic conductivity through the active principle of this initiative can achieve the effect of water. 
 Drain water resistance: 
 Polyethylene (HDPE) to protect against drainage board material itself is a good waterproof material. By using a reliable connection, the anti-drain as a good waterproof material aid 
 Drain protection Protective: 
 Protection against drainage board can effectively protect structures and waterproofing, and resistance to various types of soil pH and plant thorn. In the basement wall backfill, it can protect against damage to buildings and waterproof layer. 
 Moisture drainage and ventilation insulation board functions: 
 Laboratory data show that polyethylene (HDPE) to protect against drainage board can effectively reduce the indoor 14 db, 500HZ noise, noise with a significant noise reduction features. Waterproof guide plate on the ground or wall of water use can also play a role in good ventilation and moisture. 
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