Fortifiber Moistop Sealant

Fortifiber Moistop Sealant



  • Strong and flexible

  • Performance engineered for windows and doors

  • 20 oz sausage pack

  • Adheres to most surfaces

  • Exceeds ASTM and AAMA requirements.

  • Designed to be compatible with just about every kind of building material

  • Low VOC Formulation

  • Stocked in white only

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Moistop Sealant is a quality polyurethane sealant that is designed to be compatible with wood, vinyl and aluminum flanges, Jumbo Tex® building paper, WeatherSmart®, FortiWrap®, PlyDry® and all Fortifiber flashings. It is the most logical choice for window and door installations and a variety of other building applications. Moistop Sealant delivers excellent adhesion, compatibility, durability and moisture resistance to prevent water leaks and the expensive callbacks they cause.

Exceeding ASTM C-920 and AAMA 808.3-92 (Exterior Perimeter Sealing Compounds) standards, Moistop Sealant makes it easy to get extraordinary results from an ordinary caulking gun. A continuous bead on the window nail flange gives long lasting protection against moisture infiltration. And even though Moistop Sealant is tough enough to repair torn weather-resistive barriers, it is smooth enough to take paint in visible application areas.