FloormarX Floor markers provide temporary lines, spots, even drawings on well sealed/cured gymnasium and other non-porous floors. Designed to stand up to heavy foot traffic and then be easily wiped away with FloormarX Foot Wipes. Markers dry in 2 minutes or less and make over 250 yards of 1-1/4" wide lines. Always test on small inconspicuous areas of floor before use. Not for newly sealed floors.