Appeals Board company provides best quality of magnesium oxide cement boards. My friend has recently bought tile backer boards. He recommended me to buy cement board products from this company. Those are water resistant & their max water absorbtion rate is less than 15%. Those panels are designed for use as underlayment. You can also get magnesium oxide cement based boards from Kunshan Boda Building Material Co.,Ltd. Source: http://www.rockmaxpan.com/
more