Our standard patio grout is designed for use on riven natural stone as well as natural stone setts. It is made up of sand grains that are coated in resin and features a separate harderner. This grouting will take 24 hours to cure at a temperature of 20 degrees celcius and has a working time of 20 minutes at the same temperature. Our patio grout has a shelf life of one year provided that it is unopened, sealed and that the packaging is undamaged.To see which colours of paving and stone wall cladding that this grout is compatible with, check out our grout compatibility guide.