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Flashing & Masking Tape

Professional Flashing & Masking Tape for Construction Use

This collection features premium tape solutions including flashing and masking tapes used in construction, waterproofing, and surface protection applications. Whether you're sealing window and door openings with self-adhering or butyl flashing tape, or using waterproof masking tape for precise coverage during painting or surface prep, these products deliver clean results and reliable adhesion. Featuring trusted brands like Alpha and OSI, as well as high-performance options like Nichigo G-Tape, this collection is built for contractors who demand durability, weather resistance, and efficiency on the jobsite.

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Roll of 2 inch 3045 Nichigo Gatorade tape on a white background
Roll of 2 inch 3045 Nichigo Gatorade tape on a white background

Alpha® 3045 Series Self-Adhering Flashing Tape for Rubber Seaming

Alpha®
$21.32 - $89.96
$21.32
$21.32 - $89.96
$21.32 - $89.96
$21.32
122 in stock!

Alpha® 3045 Series Self-Adhering Flashing Tape, featuring Nichigo G-Tape™ technology, is a professional-grade solution designed specifically for co...

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$21.32 - $89.96
$21.32
$21.32 - $89.96
$21.32 - $89.96
$21.32
Roll of 2 inch Nichigo G-Tape on a white background
Collection of G-Tape rolls with labels on a white background

Alpha® 3040 Series High Adhesion Acrylic Flashing Tape

Alpha®
$18.20 - $89.96
$18.20
$18.20 - $89.96
$18.20 - $89.96
$18.20
63 in stock!

Alpha® 3040 Series High Adhesion Acrylic Flashing Tape by G-Tape offers deck builders, contractors, and homebuilders a superior solution for window...

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$18.20 - $89.96
$18.20
$18.20 - $89.96
$18.20 - $89.96
$18.20
Roll of 2 inch Nichigo G-Tape on a white background
Roll of 2 inch Nichigo G-Tape on a white background

Alpha® 3035 Series Self-Adhering Linerless Flashing Tape

Alpha®
$18.20 - $29.64
$18.20
$18.20 - $29.64
$18.20 - $29.64
$18.20
12 in stock!

Alpha® 3035 Series Self-Adhering Linerless Flashing Tape is a premium solution designed for contractors, homebuilders, deck builders, and window in...

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$18.20 - $29.64
$18.20
$18.20 - $29.64
$18.20 - $29.64
$18.20
Green G-Tape roll with Alpha Professional Tools branding on a white background
Green tape roll with Nichigo G-Tape branding on a white background Save $1.00 Save $0.00

Alpha® Green Nichigo G-Tape™ 1000 Series Waterproof Multi-Purpose Tape

Alpha®
$16.79
$16.79 - $16.79
$16.79
$15.79
$15.79 - $15.79
$15.79
21 in stock!

The Alpha® Green Nichigo G-Tape™ 1000 Series is a waterproof, multi-purpose tape designed specifically for professional tile installers and contrac...

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$16.79
$16.79 - $16.79
$16.79
$15.79
$15.79 - $15.79
$15.79
Save $1.00 Save $0.00
G-Tape roll with Alpha Professional Tools branding in a clear package on a white background
Roll of black and yellow striped tape with Nippon Gohsei branding on a white background
Save $1.38 Save $0.00

Alpha® Caution Nichigo G-Tape™ 1000 Series

Alpha®
$15.45
$15.45 - $15.45
$15.45
$14.07
$14.07 - $14.07
$14.07
Only 2 left!

Alpha® Caution Nichigo G-Tape™ 1000 Series is a premium waterproof caution tape designed for contractors, tile installers, and construction profess...

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$15.45
$15.45 - $15.45
$15.45
$14.07
$14.07 - $14.07
$14.07
Save $1.38 Save $0.00
Sold out

OSI® QUAD® Butyl Flash – Self-Adhering Flashing Tape

OSI
$53.16 - $78.60
$53.16 - $78.60
$53.16
$46.24 - $66.19
$46.24 - $66.19
$46.24
Out of stock

OSI® QUAD® Butyl Flash is a high-performance, self-adhering flashing tape designed to protect windows, doors, and wall openings from air and moistu...

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$53.16 - $78.60
$53.16 - $78.60
$53.16
$46.24 - $66.19
$46.24 - $66.19
$46.24
Sold out
Alpha white Nichigo G-tape packaged on a white background
Alpha white Nichigo G-tape on a white background
Sold out

Alpha® White Nichigo G-Tape™ 1000 Series

Alpha®
$16.79
$16.79 - $16.79
$16.79
$16.30
$16.30 - $16.30
$16.30
Out of stock

Alpha® White Nichigo G-Tape™ 1000 Series is a versatile, waterproof tape designed for contractors and tile installers who need a reliable, easy-to-...

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$16.79
$16.79 - $16.79
$16.79
$16.30
$16.30 - $16.30
$16.30
Sold out
Alpha Professional Tools Clear Multi-Purpose G-Tape
Sold out

Alpha® Clear Nichigo G-Tape™ 1000 Series

Alpha®
$16.79
$16.79 - $16.79
$16.79
$15.79
$15.79 - $15.79
$15.79
Out of stock

Alpha® Clear Nichigo G-Tape™ 1000 Series is a premium waterproof surface protection tape designed specifically for contractors and professional til...

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$16.79
$16.79 - $16.79
$16.79
$15.79
$15.79 - $15.79
$15.79
Sold out
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