Detail waterproofing a chimney or vent with Mariseal System 250. The procedure would: – apply primer or Mariseal Mariseal 710 Aqua Coat – Apply Mariseal 250 in the fireplace and around it. – Placement of the first reinforcement Mariseal Fabric circular shape in corners impregnated Mariseal 250 – Placement of the second reinforcement Mariseal Fabric on the entire surface of the conduit a short overlap. – Placement of the third reinforcing fabric Mariseal at the base of the chimney. – Application of Mariseal System 250