Non-Explosive Demolition Agent (HSCA) - Soundless Expansive Mortar Product Introduction Non-Explosive Demolition Agent (HSCA), also known as Soundless Cracking Agent, Static Crushing Agent, or Expansive Mortar, is a grey powder material with calcium oxide (CaO) as its main component. When mixed with water and poured into pre-drilled holes, a hydration reaction occurs, generating tremendous expansive pressure (up to 120 MPa / 1200 kg/cm²) that silently cracks rock and concrete