The product is environmentally friendly, contains no chemical additives and is approved for direct contact with potable drinking water (DWI reg.31 Approved). Natural Cement based products have no shelf life, can be used down to and below 0°c, they require no grit blasting, steel primers or bonding & curing agents, making them some of the most cost effective materials on the market. More information on this product can be found at: http://naturalcement.co.uk/