Expansive Demolition Grout - Soundless Rock and Concrete Cracking Agent A non-explosive, soundless demolition powder that cracks rock and reinforced concrete through controlled expansive pressure. No blasting license, no vibration, no fly rock, no noise. Ideal for quarry bench trimming, foundation trenching, tunnel widening, and urban demolition where explosives are not allowed. Mixing Ratio: 5 kg Powder to 1.2 kg Water The standard batch is 5 kg of powder mixed with 1.2 kg