SAI Sandstone – SPASA Awards 2017 SAI Sandstone – SPASA Awards 2017 Best In-Situ Paving or Stone Product SAI Sandstone was awarded both Gold and Highly Commended for the SPASA Best In Situ Paving or Stone Product. Best In Situ Paving or Stone Product – Gold Best In Situ Paving or Stone Product – Highly Commended View Current Project