Certified Business
With over 100,000 orders
With over 100,000 orders
Alpha Nichigo G-Tape 3040 Series Acrylic Flashing Tape
Fast Shipping
Easy Returns
Secure Checkout
At a Glance
Quick Decision Guide
Tape Size
4" x 65'
Adhesive Type
Acrylic
Bond Type
Permanent
Primer Required
No
Application
Windows, Doors, Deck Beams & Joists
Temperature Range
-40°F to 176°F
Waterproof
Yes
Certification
AAMA 711 Level 3 Class A
Why Choose This Product
Key Benefits
Permanent Acrylic Bond
Provides lasting adhesion for exterior flashing applications
Primer-Free Installation
Bonds without requiring an additional primer
Waterproof Protection
Helps protect windows, doors and deck framing from water exposure
All-Weather Performance
Rated for use from -40°F to 176°F
Hand-Tearable Design
Tears straight and cleanly without a cutting tool
Weather & UV Resistance
Resists demanding exterior weather and ultraviolet exposure
Installer-Friendly Handling
Face-to-face adhesive contact separates cleanly during application
Five Width Options
Available in 2", 4", 6", 9" and 12" widths on 65' rolls
Product Information
Product Details
Specifications
Brand
Alpha®
Part Number
3040BK-GT-4-65
UPC
850011740248
Product Type
Acrylic Flashing Tape
Series
G-Tape™ 3040 Series
Size
4" x 65' (100 mm x 20 m)
Width
4" (100 mm)
Length
65' (20 m)
Color
Black
Adhesive Type
Acrylic
Bond Type
Permanent
Recommended For
Permanent Bonding
Applications
Windows, Doors, Deck Beams & Deck Joists
Waterproof
Yes
Primer Required
No
Application Temperature Range
-40°F to 176°F (-40°C to 80°C)
Certification
AAMA 711 Level 3 Class A
Weather Resistance
High
UV Resistance
High
Hand Tearable
Yes
Face-to-Face Adhesive Separation
Cleanly Separates During Application
About This Product
Acrylic Flashing Tape for Windows and Doors
Alpha® Nichigo G-Tape™ 3040 Series is a high-adhesion acrylic flashing tape for waterproof protection around windows, doors, and other building transitions. This permanent window flashing tape is lighter than traditional butyl and rubberized asphalt flashing products, making the rolls easier to handle during installation.
Deck Flashing Tape for Beams and Joists
G-Tape 3040 can be applied to deck beams and joists to help protect framing from water exposure. Its waterproof acrylic construction allows the same flashing tape system to be used for deck framing, window openings, door openings, and other exterior transitions.
Primer-Free Permanent Adhesion
This permanent adhesive flashing tape forms a lasting bond without requiring an additional primer. It is rated for all-weather use from -40°F to 176°F (-40°C to 80°C) and carries an AAMA 711 Level 3 Class A rating for demanding hot- and cold-weather performance. High weather and UV resistance further support exterior flashing applications.
Hand-Tearable 65' Rolls
Nichigo G-Tape 3040 tears straight and cleanly by hand, reducing the need for a knife or scissors during installation. If exposed adhesive surfaces accidentally fold together while the liner is removed, they can be separated cleanly before the tape is applied. Each black roll measures 65' long and is available in 2", 4", 6", 9", and 12" widths.
Product Resources
Documentation & Downloads
Common Questions
Frequently Asked Questions
What is Nichigo G-Tape 3040 flashing tape used for?
G-Tape 3040 is used as waterproof flashing around windows, doors, deck beams, deck joists, and other building transitions requiring permanent protection from water exposure.
Does G-Tape 3040 require primer?
No. The acrylic flashing tape is designed to provide permanent adhesion without requiring an additional primer.
What temperature range is G-Tape 3040 rated for?
G-Tape 3040 is rated for all-weather use from -40°F to 176°F (-40°C to 80°C).
Is G-Tape 3040 waterproof?
Yes. The 3040 Series is a waterproof flashing tape designed to protect building components and exterior transitions from water exposure.
Can G-Tape 3040 be torn by hand?
Yes. The tape tears straight and cleanly by hand, allowing installers to size pieces without using a knife or scissors.
What sizes are available for G-Tape 3040?
The black 3040 Series is available in 2", 4", 6", 9", and 12" widths. Each roll measures 65' long.
What happens if the adhesive sides stick together?
If the tape accidentally folds onto itself while removing the liner, the face-to-face adhesive surfaces can be separated cleanly during installation without a loss of performance.
What is the AAMA rating for G-Tape 3040?
G-Tape 3040 carries an AAMA 711 Level 3 Class A rating for demanding hot- and cold-weather flashing performance without an additional primer.