SIQURA™ CRX Mould Killer & protectant contains a two anti mould agents. One acts to kill mould on contact the other is a unique unique active ingredient called QUATLOCKTM. SIQURA™ CRX Mould Killer & protectant is applied onto surfaces by spraying, wiping scrubbing or dipping. The actives go to work killing mould and as it dries, the Quatlock forms an organo-silane matrix of electrostatically charged spikes that bonds to the treated surface. The surface bound QUATLOCKTM kills the mould that makes contact with the surface. Unlike all non-bound mould inhibitors, QUATLOCKTM does not leach from (or leave) the treated surface. Because the QUATLOCKTM isn’t consumed in the process, it remains continually ready to defend surfaces for up to 12 months.