Use Chimney Rx Brushable Crown Repair wherever a long lasting exterior waterproof membrane is needed, such as masonry chimney crowns, chimney corbels, tops of masonry or parapet walls. Another use is for masonry window sills where bricks are laid in a soldier pattern at the base of the window. Chimney Rx Brushable Crown Repair can be custom colored with small amounts of standard mortar dye. Shipping is FREE (contiguous US only).