Detail of waterproofing with a skylight Mariseal System 250. The procedure would: – Apply the primer Mariseal or Mariseal 710. Aqua Coat – Apply Mariseal 250 at the corners and coving. – Placement of the first reinforcement Mariseal Fabric on the corner; 250. impregnated Mariseal – Placement of the second reinforcement fabric impregnated Mariseal Mariseal 250 – Placement of the third reinforcing fabric impregnated Mariseal Mariseal 250 – 250 Mariseal application of the system