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Alpha® Nichigo G-Tape™ 3040 Series — High-Adhesion Acrylic Flashing Tape
Nichigo G-Tape™ 3040BK Black is a high-adhesion acrylic flashing tape engineered for windows, doors, and deck beam protection. AAMA 7-11 Level 3 Class A certified, it delivers permanent waterproof bonding without primer across an all-weather range of -40°F to +176°F (-40°C to +80°C). Highly weather- and UV-resistant, it hand-tears straight and easy — a favorite of deck builders across the United States for extending joist longevity and shedding water from critical envelope details.
Features
- Perfect flashing for windows, doors, and deck beams
- Hand tearing — straight and easy, no knife required
- Waterproof seal for envelope-critical details
- All-weather usage: -40°F to +176°F (-40°C to +80°C)
- AAMA 7-11 Level 3 Class A certified
- Highly weather- and UV-resistant
- Permanent acrylic adhesion — no primer required
- Cleanly removes from face-to-face adhesive contact
- Available as single roll or by the case
| Part No. | Size | Type | Color | Bond | UPC |
|---|---|---|---|---|---|
| 3040BK-GT-2-65 | 2" x 65' (50mm x 20m) | Acrylic/Flashing | Black | Permanent | 850011740231 |
| 3040BK-GT-4-65 | 4" x 65' (100mm x 20m) | Acrylic/Flashing | Black | Permanent | 850011740248 |
| 3040BK-GT-6-65 | 6" x 65' (150mm x 20m) | Acrylic/Flashing | Black | Permanent | 850011740255 |
| 3040BK-GT-9-65 | 9" x 65' (225mm x 20m) | Acrylic/Flashing | Black | Permanent | 850011740262 |
| 3040BK-GT-12-65 | 12" x 65' (300mm x 20m) | Acrylic/Flashing | Black | Permanent | 850011740224 |
- Ensure substrate is clean, dry, and free of dust, oil, or loose material.
- Cut tape to the required length; tape can be hand-torn straight without a knife.
- Peel the release liner and position the tape over the joint, seam, or flashing area.
- Press firmly along the full length, using a J-roller or hand pressure to fully wet out the adhesive.
- For overlapping seams, lap upper pieces over lower pieces shingle-style to shed water.
- Apply between -40°F and +176°F; bond strength continues to build for 24 hours after application.
Black — 2" x 65' (50mm x 20m) — Acrylic/Flashing — 3040BK-GT-2-65
| Part No. | 3040BK-GT-2-65 |
| UPC | 850011740231 |
| Size | 2" x 65' (50mm x 20m) |
| Type | Acrylic/Flashing |
| Color | Black |
| Packaged Weight | 0.50 lbs |
| Package Dimensions | 5in x 5in x 2.25in |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
Black — 4" x 65' (100mm x 20m) — Acrylic/Flashing — 3040BK-GT-4-65
| Part No. | 3040BK-GT-4-65 |
| UPC | 850011740248 |
| Size | 4" x 65' (100mm x 20m) |
| Type | Acrylic/Flashing |
| Color | Black |
| Packaged Weight | 1.55 lbs |
| Package Dimensions | 5in x 5in x 4.25in |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
Black — 6" x 65' (150mm x 20m) — Acrylic/Flashing — 3040BK-GT-6-65
| Part No. | 3040BK-GT-6-65 |
| UPC | 850011740255 |
| Size | 6" x 65' (150mm x 20m) |
| Type | Acrylic/Flashing |
| Color | Black |
| Packaged Weight | 2.30 lbs |
| Package Dimensions | 5in x 5in x 6.25in |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
Black — 9" x 65' (225mm x 20m) — Acrylic/Flashing — 3040BK-GT-9-65
| Part No. | 3040BK-GT-9-65 |
| UPC | 850011740262 |
| Size | 9" x 65' (225mm x 20m) |
| Type | Acrylic/Flashing |
| Color | Black |
| Packaged Weight | 3.25 lbs |
| Package Dimensions | 5in x 5in x 9.25in |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
Black — 12" x 65' (300mm x 20m) — Acrylic/Flashing — 3040BK-GT-12-65
| Part No. | 3040BK-GT-12-65 |
| UPC | 850011740224 |
| Size | 12" x 65' (300mm x 20m) |
| Type | Acrylic/Flashing |
| Color | Black |
| Packaged Weight | 4.25 lbs |
| Package Dimensions | 5in x 5in x 12.25in |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
| Property | Detail |
|---|---|
| Product Family | Nichigo G-Tape™ 3040 Series |
| Tape Type | High-Adhesion Acrylic Flashing Tape |
| Color | Black |
| Bond Type | Permanent Acrylic |
| Length per Roll | 65 ft (20 m) |
| Service Temperature | -40°F to +176°F (-40°C to +80°C) |
| Certification | AAMA 7-11 Level 3 Class A |
| Primer Required | No |
| UV Resistance | High |
| Waterproof | Yes |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
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No frequently-asked questions are currently published for this product. Contact us at e-commerce@dynamicstonetools.com.
No product-specific videos are currently available from the manufacturer or DST.
⚠ WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. Always wear appropriate PPE.
Özellikler
| Size | 2", 4", 6", 9", 12" |

















