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Size
Alpha® Nichigo G-Tape™ 3045 Series — Self-Adhering Flashing Tape
Nichigo G-Tape™ 3045BK is a single-sided flashing tape built from a laminated polyethylene cloth backing bonded to a proprietary acrylic adhesive. It is engineered for high static shear to rubber materials — including EPDM and other low-surface-energy membranes — making it the go-to seaming tape where asphalt or butyl tapes fall short. Hand-tearable in straight lines, repositionable without wrinkles, and rated for all-weather service from -40°F to +176°F (-40°C to +80°C). Meets AAMA 711-13 Type A (without primer) Level 3, and AC 148.
Features
- Laminated polyethylene cloth backing with proprietary acrylic adhesive
- High static shear bond to rubber substrates including EPDM
- Hand-tearable in straight lines — no knife or scissors required
- Scrap-less design: face-to-face adhesive contact separates without damage
- Repositionable during application without wrinkling
- All-weather service range: -40°F to +176°F (-40°C to +80°C)
- Effective replacement for asphalt and butyl tape in rubber seaming applications
- Meets AAMA 711-13 Type A (without primer), Level 3, and AC 148
| Part No. | Size | Type | Color | Bond | UPC |
|---|---|---|---|---|---|
| 3045BK-GT-2-65 | 2" x 65' (50mm x 20m) | Premium Low Surface Energy Flashing | Black | Permanent | 850011740842 |
| 3045BK-GT-3-65 | 3" x 65' (75mm x 20m) | Premium Low Surface Energy Flashing | Black | Permanent | 850011740897 |
| 3045BK-GT-4-65 | 4" x 65' (100mm x 20m) | Premium Low Surface Energy Flashing | Black | Permanent | 850011740859 |
| 3045BK-GT-6-65 | 6" x 65' (150mm x 20m) | Premium Low Surface Energy Flashing | Black | Permanent | 850011740866 |
| 3045BK-GT-9-65 | 9" x 65' (225mm x 20m) | Premium Low Surface Energy Flashing | Black | Permanent | 850011740873 |
| 3045BK-GT-12-65 | 12" x 65' (300mm x 20m) | Premium Low Surface Energy Flashing | Black | Permanent | 850011740880 |
- Ensure the substrate is clean, dry, and free of dust, oil, and loose particles before applying.
- Measure and cut the required length from the roll — or hand-tear in a straight line.
- Peel back a short section of the release liner and position the tape against the rubber surface.
- Press the tape into place; reposition without wrinkling if alignment needs adjustment.
- Continue peeling the liner while firmly pressing the tape along the seam.
- Use a J-roller or firm hand pressure across the full width to seat the acrylic adhesive.
- Verify edges are fully bonded; apply at temperatures within the rated -40°F to +176°F service range.
Black — 2" x 65' (50mm x 20m) — Premium Low Surface Energy Flashing — 3045BK-GT-2-65
| Part No. | 3045BK-GT-2-65 |
| UPC | 850011740842 |
| Size | 2" x 65' (50mm x 20m) |
| Type | Premium Low Surface Energy Flashing |
| Color | Black |
| Recommended For | Seaming Rubber |
| Packaged Weight | 0.50 lbs |
| Package Dimensions | 5" x 5" x 2.25" |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
Black — 3" x 65' (75mm x 20m) — Premium Low Surface Energy Flashing — 3045BK-GT-3-65
| Part No. | 3045BK-GT-3-65 |
| UPC | 850011740897 |
| Size | 3" x 65' (75mm x 20m) |
| Type | Premium Low Surface Energy Flashing |
| Color | Black |
| Recommended For | Seaming Rubber |
| Packaged Weight | 1.00 lbs |
| Package Dimensions | 5" x 5" x 3.25" |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
Black — 4" x 65' (100mm x 20m) — Premium Low Surface Energy Flashing — 3045BK-GT-4-65
| Part No. | 3045BK-GT-4-65 |
| UPC | 850011740859 |
| Size | 4" x 65' (100mm x 20m) |
| Type | Premium Low Surface Energy Flashing |
| Color | Black |
| Recommended For | Seaming Rubber |
| Packaged Weight | 1.55 lbs |
| Package Dimensions | 5" x 5" x 4.25" |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
Black — 6" x 65' (150mm x 20m) — Premium Low Surface Energy Flashing — 3045BK-GT-6-65
| Part No. | 3045BK-GT-6-65 |
| UPC | 850011740866 |
| Size | 6" x 65' (150mm x 20m) |
| Type | Premium Low Surface Energy Flashing |
| Color | Black |
| Recommended For | Seaming Rubber |
| Packaged Weight | 2.30 lbs |
| Package Dimensions | 5" x 5" x 6.25" |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
Black — 9" x 65' (225mm x 20m) — Premium Low Surface Energy Flashing — 3045BK-GT-9-65
| Part No. | 3045BK-GT-9-65 |
| UPC | 850011740873 |
| Size | 9" x 65' (225mm x 20m) |
| Type | Premium Low Surface Energy Flashing |
| Color | Black |
| Recommended For | Seaming Rubber |
| Packaged Weight | 3.25 lbs |
| Package Dimensions | 5" x 5" x 9.25" |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
Black — 12" x 65' (300mm x 20m) — Premium Low Surface Energy Flashing — 3045BK-GT-12-65
| Part No. | 3045BK-GT-12-65 |
| UPC | 850011740880 |
| Size | 12" x 65' (300mm x 20m) |
| Type | Premium Low Surface Energy Flashing |
| Color | Black |
| Recommended For | Seaming Rubber |
| Packaged Weight | 4.25 lbs |
| Package Dimensions | 5" x 5" x 12.25" |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
| Property | Detail |
|---|---|
| Backing | Laminated polyethylene cloth |
| Adhesive | Proprietary acrylic |
| Bond Type | Permanent |
| Color | Black |
| Recommended For | Seaming rubber sheets (EPDM and similar) |
| Service Temperature | -40°F to +176°F (-40°C to +80°C) |
| Standards | AAMA 711-13 Type A (without primer), Level 3; AC 148 |
| Length per Roll | 65 ft (20 m) |
| Commodity Code | 3919.10.2055 |
| Country of Origin | Japan |
- Nichigo G-Tape™ 1000 Series — Multi-Purpose Surface Protection
- Nichigo G-Tape™ 3040 Series — High Adhesion Acrylic Flashing
- Nichigo G-Tape™ 3035 Series — Self-Adhering Flashing without Liner
- Nichigo G-Tape™ 1008 Series — Long-Term Masking and Storage
- Multi-Purpose Aprons (Oxford Fabric D900 PU Coated)
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.
Specifications
| Size | 2", 3", 4", 6", 9", 12" |

















