Treatment of materials, namely, treating wood materials, forest products and combustible materials used to construct buildings and/or found on surrounding property, using environmentally-clean fire inhibiting chemicals providing environmentally-clean wildfire defense, including defending and protecting combustible buildings from fire ignition and flame spread, by spray application of environmentally-clean liquid fire inhibiting chemicals that cling to the exterior surfaces of the combustible buildings and surrounding property; defending and protecting home and business properties from fire ignition and flame spread, including wildfires, fire storms and arson fires, by spray application of environmentally-clean liquid fire inhibiting biochemicals that cling to dry ground vegetation and other combustible surfaces of such properties; providing wildfire defense to property located in a wildfire urban interface (WUI) region, by spraying environmentally-clean liquid fire inhibiting biochemicals on the combustible surfaces of buildings and surrounding property to proactively defend the same against fire ignition and flame spread caused by wildfires and fire storms.