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Flashing

Protect what matters most with our flashing and weatherproofing solutions — designed to seal vulnerable areas, prevent moisture intrusion, and improve long-term building durability. This category includes liquid flashings, membranes, window flashing tapes, sill protection, joist barrier tapes, air and weather barrier membranes, and construction sealing tapes from trusted brands like Polyguard and DuPont. Whether you’re sealing windows and doors, protecting deck framing, reinforcing weather barriers, or preventing air and water infiltration at critical transitions, these products help create a continuous protective envelope around your project. Ideal for residential and commercial construction alike, they support better energy efficiency, structural longevity, and peace of mind against the elements.

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  • Box of twelve 20 ounce sausage tubes containing blue trowel-grade sealant for liquid flashing. Infographic highlighting product features including no mixing, durability, breathability, and wet or dry application. It notes the sealant is solvent-free and adheres to concrete, metal, CMU block, untreated OSB, plywood sheathing, and gypsum ICF.
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    POLYGUARD Blue Barrier Liquid Flashing 20oz Sausage

    Polyguard
    $253.79 - $332.49
    Polyguard Blue Barrier™ Liquid Flashing (BB LF) is a high-performance, fluid-applied flashing designed to provide a fully adhered, weather-resistant air barrier system for windows and door installations. Formulated with advanced Silyl Terminated...
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  • Kit includes twelve 20 ounce liquid flashing sausage tubes in a cardboard box with a blue manual applicator gun. Infographic summary of liquid flashing benefits:

No Mixing Needed: Ready-to-use formula.

Exceptional Durability: Prevents flashing wear and tear.

Permeable: Allows substrates to breathe.

Bonds to Substrates: Works in wet and dry conditions.

Environmentally Friendly: Solvent free, isocyanate free, and low volatile organic compounds.

Superior Adhesion: Bonds to concrete, metal, CMU block, untreated OSB, plywood sheathing, and gypsum ICF.
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    POLYGUARD Blue Barrier Liquid Flashing 20oz Sausage & Gap Filler

    Polyguard
    $264.79 - $341.79
    The Polyguard Blue Barrier™ Window & Door Flashing Kit is an all-in-one solution for professional-grade air and moisture sealing around window and door rough openings. This kit combines Blue Barrier™ Liquid Flashing (BB LF) and Blue...
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  • Four rolls of 20 mil window and door flashing tape, each measuring 4 inches wide by 100 linear feet long. Infographic showing a contractor applying self-adhering flashing tape to a window frame to create a watertight seal.
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    Polyguard® WindowSeal® Window Flashing Tape, 4-Pack

    Polyguard
    $139.79 - $391.49
    Polyguard WS20 WindowSeal 20 Mil Flashing Tape is a high-performance, self-adhering flashing solution for windows, doors, and construction seams. Designed to provide a waterproof, airtight seal, WS20 consists of a 20 mil rubberized asphalt coating...
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  • Four rolls of 20 mil self-adhering butyl window and door flashing tape, each measuring 4 inches wide by 100 feet long. Contractor using a hand tool to press blue butyl flashing tape around a window header for a moisture-proof seal.
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    Poly Wall® Butyl Flash Window Flashing Tape, 4 Pack

    Polyguard
    $180.49 - $513.49
    Polyguard BF20 Butyl Flash is a high-performance 20 mil self-adhering flashing tape used to seal straight window frames, door frames, and construction seams. Designed with a butyl-based waterproofing coating and laminated to a polyethylene film, BF20...
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  • Kit includes four rolls of joist tape for wood decks and one handheld white poly roller with a black handle. A roll of joist tape rests on a wooden deck frame where the black tape has been applied to the top of the joists to prevent wood rot.
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    Poly Wall® Rot Shield Joist Tape for Decking, 4" x 100', Pack of 4 with Seam Roller

    Polyguard
    $131.79
    Rot Shield™ Joist Tape is your deck’s first line of defense against water intrusion and premature structural damage. Designed to serve as a waterproof barrier between joists, ledger boards, and deck boards, this easy-to-install tape helps...
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  • A single 4 inch by 75 foot roll of gray self-adhesive termite barrier and flashing moisture membrane. Infographic showing moisture barrier installed around window openings on green sheathing to prevent water intrusion.
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    TERM Flashing – 40 Mil Self-Adhered Termite & Waterproofing Barrier

    Polyguard
    $61.49 - $242.49
    TERM Flashing is a flexible, self-adhesive, non-structural membrane designed to act as a waterproofing, air, and pest exclusion barrier—specifically targeting the intersection between horizontal concrete slabs and exterior sheathing. This membrane...
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  • A white cardboard box and a roll of gray self-adhesive waterproofing membrane for structural protection.
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    Polyguard UV2-40 | 40-Mil Rubberized Asphalt Air & Weather Barrier Membrane with Aluminum UV Protection – 36" x 33.3' Roll (Residential WRB/Flashing)

    Polyguard
    $136.79
    The Polyguard UV2-40 Membrane is a heavy-duty, 40-mil rubberized asphalt air and weather barrier designed for residential above-grade wall protection. Laminated to two layers of high-strength polyethylene film and topped with a reflective aluminum...
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  • General picture of rot shield
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    DuPont™ Weathermate™ Sill Pan 271260 Box of 25 Window Sill Flashing

    DuPont
    $158.79
    DuPont™ Sill Pan is a translucent, molded PVC window sill flashing designed to protect one of the most vulnerable areas of window installations—sill corners. With an innovative two-piece, adjustable design, the Sill Pan forms a continuous,...
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  • Weathermate tape roll
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    DuPont™ Weathermate™ Construction Tape, 1 7/8" x 165'

    DuPont
    $26.49
    DuPont™ Weathermate™ Construction Tape from DuPont is a durable sealing tape with excellent adhesion properties to help protect homes and building against moisture and air intrusion. Weathermate™ Construction Tape is...
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