Laticrete Latasil Caulk/ Sealant, 10.3 oz Tube, Smoke Grey Approxomate Coverage Per Tube for Thickness of 1/4" x 1/4" is 25 linear FT Approxomate Coverage Per Tube for Thickness of 3/8" x 3/8" is 11 linear FT Color: Smoke Grey 10.3 oz Tube High Performance Silicone