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Alpha® Nichigo G-Tape™ 3035BK Seaming Tape

Nichigo G-Tape™ 3035BK is a linerless, self-adhering flashing tape engineered for exterior wall fenestration: seaming and splicing insulation sheets, house wraps and wall boards; sealing window and door frames; and waterproofing outdoor deck rafters. It tears straight by hand, weighs 50–70% less than conventional window flashing tape, and stands up to long-term UV and weather thanks to its black substrate. 3035BK meets AAMA 711-13 Type A (without primer), Level 3 and AC 148, and ships in 2", 3" and 4" widths on 65' rolls.

Features

  • Linerless, self-adhering flashing tape — no release paper to discard
  • Permanent acrylic adhesive bonds aggressively to house wrap, OSB, sheathing and frames
  • Hand-tearable straight — no knife or scissors required
  • “Scrap-less” face-to-face adhesive separates without damage during install
  • 50–70% lighter than conventional window flashing tape
  • High UV resistance with durable black substrate
  • Service temperature range: -40°F to +176°F (-40°C to +80°C)
  • Effective for window/door seaming, splicing, waterproofing and deck rafter flashing
  • Meets AAMA 711-13 Type A (without primer), Level 3, and AC 148
  • Available in 2", 3" and 4" widths on 65' (20 m) rolls
Part No. Size Color Bond Recommended For UPC
3035BK-GT-2-65 2" x 65' (50 mm x 20 m) Black Permanent Self-Adhering Flashing 850011740170
3035BK-GT-3-65 3" x 65' (75 mm x 20 m) Black Permanent Self-Adhering Flashing 850011740187
3035BK-GT-4-65 4" x 65' (100 mm x 20 m) Black Permanent Self-Adhering Flashing 850011740194
  1. Verify substrate is clean, dry and free of dust, oil or loose debris.
  2. Choose width to match the joint: 2" for tight seams, 3"–4" for window flanges and house-wrap splices.
  3. Cut or hand-tear the length needed and position one edge along the joint.
  4. Press the tape down firmly along the full length, working out any air pockets.
  5. Roll the surface with a J-roller to fully wet the adhesive into the substrate.
  6. Lap subsequent courses shingle-style so water drains away from the joint.
  7. For deck rafter waterproofing, run the tape continuously over the top of the rafter and down each side.
  8. Once placed, the tape is permanent — plan layout before sticking.
Permanent pressure-sensitive adhesive — G-Tape 3035BK 2" x 65' Linerless Flashing — 3035BK-GT-2-65
Part No. 3035BK-GT-2-65
UPC 850011740170
Type G-Tape 3035BK 2" x 65' Linerless Flashing
Attachment Permanent pressure-sensitive adhesive
Recommended For Self-adhering flashing for seaming, splicing and waterproofing
Packaged Weight 0.50 lbs
Package Dimensions 5" x 5" x 2.25"
Commodity Code 3919.10.2055
Country of Origin Japan
Permanent pressure-sensitive adhesive — G-Tape 3035BK 3" x 65' Linerless Flashing — 3035BK-GT-3-65
Part No. 3035BK-GT-3-65
UPC 850011740187
Type G-Tape 3035BK 3" x 65' Linerless Flashing
Attachment Permanent pressure-sensitive adhesive
Recommended For Self-adhering flashing for seaming, splicing and waterproofing
Packaged Weight 1.00 lbs
Package Dimensions 5" x 5" x 3.25"
Commodity Code 3919.10.2055
Country of Origin Japan
Permanent pressure-sensitive adhesive — G-Tape 3035BK 4" x 65' Linerless Flashing — 3035BK-GT-4-65
Part No. 3035BK-GT-4-65
UPC 850011740194
Type G-Tape 3035BK 4" x 65' Linerless Flashing
Attachment Permanent pressure-sensitive adhesive
Recommended For Self-adhering flashing for seaming, splicing and waterproofing
Packaged Weight 1.55 lbs
Package Dimensions 5" x 5" x 4.25"
Commodity Code 3919.10.2055
Country of Origin Japan
Property Detail
Backing Linerless Polyethylene Substrate (UV Black)
Adhesive Permanent Acrylic
Color Black
Roll Length 65' (20 m)
Bond Type Permanent
Service Temperature -40°F to +176°F (-40°C to +80°C)
Standards AAMA 711-13 Type A (no primer), Level 3; AC 148
Country of Origin Japan
What is G-Tape™ 3035BK used for?

Self-adhering flashing for exterior wall fenestration — window and door seaming, splicing of insulation sheets and house wraps, and waterproofing of deck rafters.

Is the tape permanent or removable?

Permanent. Plan layout before pressing the tape into place.

Does it need a primer?

No. 3035BK meets AAMA 711-13 Type A without primer.

Can I tear it by hand?

Yes — the tape tears straight by hand. No knife or scissors required.

How does it compare to conventional window flashing tape?

It's 50–70% lighter and easier to handle, with comparable or better adhesion and UV resistance.

Is it UV-stable for long-term exposure?

Yes. The black substrate provides high UV resistance for extended outdoor service.

What temperatures can it handle?

-40°F to +176°F (-40°C to +80°C) in service.

What widths are available?

2", 3" and 4" on 65' rolls.

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", 3", 4"