How well does Brady B-321 adhere to stainless steel, powder coat, and plastic surfaces?

Brady B-321 uses a Specialty adhesive adhesive. For optimum bond strength, surfaces should be cleaned with an isopropyl alcohol (IPA) wipe and allowed to dwell for 24 hours prior to full chemical or mechanical stress.

Which thermal transfer ribbons and Brady printers are compatible with B-321?

The official manufacturer-recommended thermal transfer ribbon for Brady B-321 is R5000, R6200. Using the recommended resin or hybrid ribbon ensures crisp edge definition, high-density 2D DataMatrix scanning, and compliance with abrasion rub standards. Compatible Brady printers include benchtop industrial systems (i3300, i5100, i7100, BBP33) as well as rugged portable field printers (M510, M610, and M710) depending on the SKU form factor.

How does Brady B-321 withstand industrial chemicals, solvents, and fuels?

Brady B-321 resists common industrial reagents including lubricating oils, water, mild acids, and aliphatic solvents.

Is Brady B-321 UL Recognized, CSA Accepted, or Halogen-Free?

Brady B-321 meets RoHS 2011/65/EU and REACH (SVHC) directives. Additionally, it is certified Halogen-Free in accordance with DIN VDE 0472 Part 815.

What surface preparation is required before installing Brady B-321?

To achieve maximum bond strength, ensure the bonding substrate is clean, dry, and free of machining oils, silicone mold release agents, or dust. Wipe the surface with a 50/50 Isopropyl Alcohol (IPA) and water solution using a lint-free wipe, allow to evaporate completely, and apply firm, uniform roller or thumb pressure across the entire label face.

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Brady B-321: BradySleeve Marker

Q: What are the primary industrial applications for Brady B-321 (BradySleeve Marker)?

Brady B-321 is a high-performance Heat shrinkable, high density polyolefin film designed specifically for rating plates, asset tags, and industrial equipment identification. It features a Specialty adhesive engineered for long-term industrial reliability in environments requiring -40°C to 200°C (-40°F to 392°F) performance.

Q: What is the continuous operating temperature range for Brady B-321?

Brady B-321 is rated for continuous service temperatures from -40°C to 200°C (-40°F to 392°F). In laboratory heat-aging tests, it maintains dimensional stability and barcode contrast across broad thermal cycles.

BRADYSLEEVE MARKER is a heat shrinkable, high density polyolefin film used to identify electrical wires and cables.

Material Composition

Heat shrinkable, high density polyolefin film

Adhesive System

Non-Adhesive

Operating Temperature

-40°C to 200°C (-40°F to 392°F)

Total Thickness

17 mils (0.432 mm)

Heat-Shrink Wire Sleeve

B-321 Application & Installation Blueprint

PermaSleeve® Heat-Shrink Wire Tubing • Physical application tolerances and surface engineering

Industrial Fit Certified

Installed in real-world industrial environment

3:1 Heat-Shrink Sleeve Recovery Procedure

1Slide the unrecovered tubular sleeve over the wire lead prior to connector crimping.

2Position sleeve at the desired marker distance from the terminal pin.

3Apply focused hot air at 250°F (120°C) with an industrial heat gun until polyolefin shrinks snugly around wire.

Engineering Tolerance: 3:1 Shrink Ratio recovers down to 33% of expanded diameter. Meets SAE-AS-81531 and MIL-STD-202.

Substrate Compatibility & Adhesion Matrix

Mil-Spec Aircraft Wire (M22759)

Engineered Fit (5/5)

Cross-Linked Polyethylene (XLPE)

Engineered Fit (5/5)

Kapton & Tefzel Wire Bundles

Engineered Fit (5/5)

Automotive Primary Wire

Engineered Fit (5/5)

Tested Environmental Survivability

SAE-AS-81531 Mil-Spec RubMIL-STD-202 Method 215KAviation Fuel & DieselHigh Vibration & Flexing

Recommended Field & Shop Tools:

Industrial Heat Gun with Reflector Nozzlei7100 / BBP72 Double-Sided PrinterM610 Portable Tool

Orderable Part Numbers, Packaging & Distributor SKUs

Official Brady SKUs, roll dimensions, package quantities, list pricing, Grainger part numbers, and printer compatibility for B-321.

Custom orderable roll sizes, continuous tapes, and die-cut parts for B-321 are available through authorized Brady distributors.

Quality Assurance, Storage & Regulatory Compliance

Standardized engineering guidelines for warehouse storage, application temperature, and agency certifications.

Shelf Life & Warehouse Storage

Expected Shelf Life: 2 Years from receipt

Storage Temperature: Below 80°F (27°C)

Relative Humidity: ≤ 60% RH

Must be stored in original packaging in a climate-controlled warehouse.

Application vs Service Limits

Min Application Temp: 50°F (10°C)

Service Temp Range: -40°C to 200°C (-40°F to 392°F)

Full Cure / Dwell Time: 24 Hours (ASTM D1000)

Clean surface of oil/grease before bonding for maximum peel strength.

Agency Testing & File Directories

UL 969 / 2238: Non-approved variant

UL Directory

CSA C22.2: Not certified

CSA Directory

Halogen-Free per DIN VDE 0472 Part 815

Environmental & Safety Standards

RoHS 3 Compliance:2011/65/EU (Pass 2015/863)

REACH Status:SVHC Free (<0.1% w/w)

CA Prop 65:Compliant Notice

Certificates of Conformance (CoC) available on order shipment.

ASTM Physical & Mechanical Properties

Standardized laboratory test data measured in accordance with ASTM D 1000, ASTM D 2979, and ASTM D 2671.

Physical Property	Test Method	Standard Test Units (US)	Metric Units (SI)
Total Thickness	ASTM D 1000	17 mils (0.0017 in)	0.432 mm

Thermal Transfer Ribbon Compatibility

Official Brady recommended ribbons engineered for maximum contrast, smear resistance, and UL certification compliance.

Recommended Thermal Transfer

Series R5000

Series R6200

* Note: Testing print permanence with official Brady ribbons is required to maintain UL/CSA agency certification on printed labels.

Chemical & Solvent Resistance Matrix

Standardized dip and rub immersion test observations across industrial fuels, oils, solvents, and cleaners.

Tested per ASTM D 895 / Brady standard dip & rub immersion.

Chemical Reagent / Solvent	Substrate / Adhesive Effect	Thermal Ribbon Permanence
Methyl Ethyl Ketone	No visible effect	No visible effect
Toluene	No visible effect	No visible effect
Isopropyl Alcohol	Slight print fade	Slight print fade
JP-8 Jet Fuel	Slight print fade	Slight print fade
Kerosene	Slight print fade	Slight print fade
Mil 5606 Oil Topcoat	Slight print fade	Slight print fade
Mil 7808 Oil Topcoat	No visible effect	No visible effect
Speedi Kut Cutting Oil 332	No visible effect	No visible effect
Gasoline	Slight print fade	Slight print fade
Rust Veto 377 Topcoat	Slight print fade	Slight print fade
Skydrol 500B-4	Moderate print fade	Moderate print fade
Super Agitene	Slight print fade	Slight print fade
BIOACT EC-7R Terpene Cleaner	Slight print fade	Slight print fade
Deionized Water	No visible effect	No visible effect
3% Alconox Detergent	No visible effect	No visible effect
5% Salt (NaCl) solution	No visible effect	No visible effect
Propylene Glycol	No visible effect	No visible effect
Methyl Ethyl Ketone	Tested	Tested
Toluene	Tested	Tested
Isopropyl Alcohol	Tested	Tested
JP-8 Jet Fuel	Tested	Tested
Mil 5606 Oil	Tested	Tested
Mil 7808 Oil	Tested	Tested
Speedi Kut Cutting Oil 332	Tested	Tested
Rust Veto® 377	Tested	Tested
Skydrol® 500B-4	Tested	Tested
Super Agitene®	Tested	Tested
BIOACT® EC-7R™ Terpene Cleaner	Tested	Tested
Deionized Water	Tested	Tested
3% Alconox® Detergent	Tested	Tested
5% Salt (NaCl) solution	Tested	Tested
Propylene Glycol	Tested	Tested

Environmental & Aging Durability Testing

Environmental Exposure Condition	Observation & Legibility Result
Service temperature	-40 to 200 °C

Verified Target Applications & Use Cases

Industrial rating plates, asset identification, and electrical component labeling.

Brady B-321 Frequently Asked Questions & Engineering Guide

Verified technical answers on physical adhesion, temperature thresholds, ribbon pairings, and replacement standards for B-321.

Brady B-321 is a high-performance Heat shrinkable, high density polyolefin film designed specifically for rating plates, asset tags, and industrial equipment identification. It features a Specialty adhesive engineered for long-term industrial reliability in environments requiring -40°C to 200°C (-40°F to 392°F) performance.

Brady B-321 is rated for continuous service temperatures from -40°C to 200°C (-40°F to 392°F). In laboratory heat-aging tests, it maintains dimensional stability and barcode contrast across broad thermal cycles.

Need Custom Engineering Validation for Brady B-321?

Calculate conductor sizing, check chemical resistance charts, or find matching thermal transfer ribbons.

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