- Rugby Kiln Dried Sand Kiln Dried Sand For Jointing and Grouting Rugby® Kiln Dried Sand is a natural, specially selected washed and dried sand designed for use as a jointing or grouting sand on block paving projects. It conforms to the gradings given in Annex D of BS 7533-3:2005. Benefits : - Direct From Bag Use Use directly from the bag and brush into paving with a wide soft brush - 5m2 Typical Coverage Typical coverage – 5m2 of standard block paving