Na-bentonite waterproofing materials with a large water-absorbent swelling, expansion speed, anti-aging, anti-corrosion etc..  

Requirement	Standard
Swelling value ml/g	30
Heat0C	500
Colloid value ml/15g	100
Fineneesspass 200mesh screen%	95
Moisture%	10.0

Compound Waterproof Mat Bentonite