Please Note: All Fortifiber products are now being sold under the Henry Company brand. Images may not match the actual packaging you receive. However, the product information will be as described below.
Price: $5.59
    Purchasing Options:

    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.

    • Strong and flexible
    • Performance engineered for windows and doors
    • 10.1 oz tubes
    • 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
    Please Note: This product contains no chemicals that are listed to cause cancer or reproductive toxicity according to the California Prop 65, Safe Drinking Water and Toxic Enforcement Act of 1986. For more information please review the above SDS sheet and go to
    Explanation of Product Availability Terms

    • Stock Item: This is a product we normally have available for immediate shipment. If we are out of stock or do not have enough to complete your order we will notify you by phone or email as soon as possible. If you need to know if we have it in stock before you place the order please call 800-323-2999 Monday through Friday 7:00AM - 4:30PM.

    • Ships Direct: This product ships direct from the manufacturer usually on the same or next business day.

    • Special Order: This product has to be special ordered into our store and then shipped to the customer. This can take form 1-6 working days depending on the item and manufacturer.

    • Out of Stock: This product is out of stock and will be replaced in the future.  Depending on the vendor we can sometimes have a product that is out of stock drop shipped direct to you. Please call 800-323-2999 if you have any questions.

    • Discontinued: These are products we are no longer stocking.  However they may be available as a special order.  Please call 800-323-2999 if you have any questions.

    Please Note:  If we can drop ship an order and save shipping charges we will notify you and then pass the savings on to you.

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