PMI 321 3″ Blockout Tape – The Ultimate Residue-Free Tape for Screen Printing

Name: PMI 321 3" Blockout Tape – The Ultimate Residue-Free Tape for Screen Printing
SKU: 5578
Availability: InStock

PMI

Sale!

🇺🇸 Made in the USA — Manufactured in Noblesville, Indiana

The PMI 321 Blockout Tape — 3″ wide × 60 yards is the go-to solution for sealing open mesh, covering pinholes, and masking frame edges with a clean, residue-free bond. A fully adhesive, hand-tearable tape engineered specifically for screen printing.

✅ Blocks Pinholes & Open Mesh

✅ Residue-Free Removal

✅ Hand-Tearable — No Scissors

✅ Works on All Frame Types

✅ 60 Yards Per Roll

✅ Plastisol

✅ Water-Based

✅ Discharge

✅ Specialty

🚚 In Stock & Ships Fast — Single Rolls or Full Cases of 24

Price range: $9.49 through $3,449.99

Quantity

Roll
Case of 24
6 Pack
18 Cases of 24 (432 Rolls)

Clear

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SKU: N/A Category: Tapes Tags: blockout tape screen printing residue free, clean removal screen printing tape, durable blockout tape for screen printing, high tack blockout tape for screens, PMI 321 blockout tape 3 inch, PMI 321 screen printing tape, residue free screen printing tape 3 inch, screen printing tape for blocking pinholes, screen printing tape for ink blocking, tape for masking screen printing frames

Description

Also Available In:

2″3″ (this page)

PMI 321 Blockout Tape 3″ — Full-Width Adhesive for Total Mesh Control

Whether you’re covering pinholes, masking off registration marks, or blocking unused mesh, PMI 321 gives you a clean, reliable seal every time. Fully adhesive edge to edge — ideal where maximum coverage and a solid bond matter more than the split-zone design.

Ink Compatibility

✅ Plastisol

✅ Water-Based

✅ Discharge

✅ Specialty

What PMI 321 Does Better

🔲

Full-Width Adhesive Coverage

The 321 is adhesive across its entire width — no non-adhesive zones. Ideal for blocking larger mesh areas, sealing pinholes completely, and covering registration marks that need a solid seal.

✋

Hand-Tearable — No Tools Required

Tears cleanly by hand for straight, precise strips without scissors. In a busy production environment that speed adds up across dozens of screens per day.

🛡️

Pinhole & Mesh Blockout

Pinholes let ink seep through and ruin prints. PMI 321 seals directly over mesh to close those gaps, extending the usable life of screens that might otherwise be reclaimed prematurely.

🚫

Zero Residue on Removal

PMI 321 is formulated to release without leaving adhesive deposits on mesh, frames, or the print bed. No solvent, no scraping — just peel and reclaim.

🏭

Production-Line Durability

Holds firm through full automatic press runs — resists mechanical vibration and squeegee pressure. When the job’s done, it comes off in one clean pull.

📐

3″ Width Efficiency

A single strip covers most frame channel-to-mesh gaps in one pass — less taping time and fewer strips.

How to Apply PMI 321 Blockout Tape

Step 1 — Clean the Surface

Ensure mesh and frame are clean and dry. Any ink residue or moisture will reduce adhesion.

Step 2 — Tear to Length

Grip and snap-tear to length. The tear-resistant backing tears cleanly and straight.

Step 3 — Apply & Seal

Press firmly over the area — pinhole, mesh section, or frame edge. Smooth with a finger or squeegee.

Step 4 — Print & Remove

After the run, peel from a corner in one smooth pull. No solvent, no residue.

What’s Included

✓

PMI 321 Blockout Tape — 3″ × 60 Yards
One roll of fully adhesive, hand-tearable screen printing blockout tape.

✓

Case Option — 24 Rolls Per Case
Order a full case for production volume pricing. Select at checkout.

✓

Ships from River City Supply — San Antonio, TX
In stock, same-day shipping on orders before 3:30 PM CT.

Single Roll vs. Case — Volume Savings

1 Roll

Single Roll

Best for occasional use
or trying a new width

→

Full Case

Best for production shops
Lower cost per roll

💡 The 3″ PMI 321 comes 24 rolls per case. High-volume shops that run multiple screens per day will typically see meaningful per-roll savings vs. buying singles. Contact us at (512) 454-0505 for current case pricing.

When to Use 321 vs. Split Tape

Use PMI 321 When…

You need to cover a pinhole, block a large open mesh area, tape the print side of a screen, or mask registration marks — anywhere full-width adhesion is preferred.

Use PMI 451 Split Tape When…

You’re masking the inside channel of a rigid aluminum, roller, or wood frame and want the non-adhesive blue zone against the well for fastest removal.

Pair With

🔵

PMI 451 Split Tape

Split-zone version — better for frame channel masking

⚡

PMI Quick Rip

Same width with snap-tear design for faster application

🔧

PMI Tape Dispenser

Table-mount dispenser for fast one-handed tape pulls

Why Buy from River City Supply?

🏪

17+ Years in Business

In business since 2008 — not a fulfillment warehouse. We’re screen printing people who know these products firsthand.

🚀

Same-Day Shipping

Orders placed before 3:30 PM CT ship same day. Free shipping on orders over $200.

📦

Free In-Store Pickup

San Antonio, TX locals: in-stock orders ready in 1 hour at 11915 Starcrest Dr.

🎯

Expert Support

Call (512) 454-0505 or email [email protected]. Real answers from people who actually use this stuff.

Order PMI 321 Blockout Tape 3″ from River City Supply

In stock. Single rolls or case of 24. Same-day shipping on orders before 3:30 PM CT. Free shipping over $200.

Add to Cart

Shop All PMI Tapes

Technical Specifications

Technical Specifications — PMI #321 Blockout Tape, 3″

Specification	Value
Product Number	PMI #321
Width	3 inches (76mm)
Roll Length	60 yards (54.9 meters)
Adhesive Type	Full-width acrylic adhesive
Tear Type	Hand-tearable
Compatible Frame Types	Rigid aluminum, roller, wood
Compatible Ink Types	Plastisol, water-based, discharge, specialty
Solvent Required for Removal	None — peel-clean release
Emulsion Safe	Yes
Made In	USA — Noblesville, Indiana
Manufacturer	PMI Tape
Case Quantity	24 rolls per case
Purchase Options	Single roll or case of 24

Technical Sheets / Safety Data Sheets / Documents

FREQUENTLY ASKED QUESTIONS

Frequently Asked Questions — PMI 321 Blockout Tape 3″

What is PMI 321 used for?

PMI 321 is a full-width blockout tape for sealing open mesh, covering pinholes, masking registration marks, and taping frame edges. Unlike the 451 Split Tape which has a non-adhesive blue zone, the 321 is adhesive across its entire width — better for flat surface applications needing complete coverage.

What’s the difference between PMI 321 and PMI 451 Split Tape?

The 321 is fully adhesive across the entire width. The 451 Split Tape has a non-adhesive blue zone that sits against the frame channel for easy removal. Use 321 for pinholes, print-side blockout, and open mesh masking. Use 451 Split Tape when masking the inside of a rigid frame channel.

How many rolls are in a case?

The 3″ PMI 321 Blockout Tape comes 24 rolls per case. The other width comes 36 rolls per case.

Does it work with water-based and discharge inks?

Yes. PMI 321 seals securely against all ink systems. The adhesive holds its seal even with low-viscosity water-based and discharge inks that are more prone to seeping under inadequate blockout.

Will PMI 321 damage my emulsion?

No. PMI 321 is emulsion safe. The adhesive releases cleanly from mesh without lifting the stencil.

Can it be used to tape the print side of a screen?

Yes. PMI 321 is well-suited for print-side application as a blockout tape.

Ready to Order?

PMI 321 Blockout Tape 3″ — in stock at River City Supply. Single rolls or case of 24.

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