polymeric sand or stone dust? | flagstone joints | how-to
May 09, 2013· Please reread the article….and just say no to polymeric sand for your flagstone patio. Stone dust, for the win. Stone dust, all week long my friend. Stone dust, for life. Polymeric sand is usually available in grey, dark grey, and yellow-grey. Stone dust is usually available in whatever colors if road base type gravel are quarried in your area.