How to apply waterproof material on the cement board?
Plus a layer of geotextile and glue together with cement-based waterproof coating K11 or JS
Waterproof material life is short, it is best to shop asphalt waterproofing membrane, fire baked seal seams
You can first brush again JS composite flexible waterproof coating, and then brush it again K11 waterproof coating paint; or brush twice straight JS composite elastic waterproof coating, so you can have a good crack resistance.
