2011 KHT rock cracking agent,dexpan,non explosive demolition agent high quanlity,competitive price,short delivery ... time 2011 KHT rock cracking agent,dexpan,non explosiv demolition agent is a new-type, environmental and convenient ... powder, like cementWeight: 25kg per cartonExpiry: One year (in strict moisture-proof condition) Drilling it,mixing it,filling it and cracking,make ...