How well does Brady B-521 adhere to stainless steel, powder coat, and plastic surfaces?

Brady B-521 uses a Removable 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-521?

The official manufacturer-recommended thermal transfer ribbon for Brady B-521 is Brady Series R4300, R6000 Halogen-Free, or R6200 resin ribbons. 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-521 withstand industrial chemicals, solvents, and fuels?

Brady B-521 resists common industrial reagents including lubricating oils, water, mild acids, and aliphatic solvents.

Is Brady B-521 UL Recognized, CSA Accepted, or Halogen-Free?

Brady B-521 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-521?

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-521label_film_tape6 Orderable SKUs

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Brady B-521: THERMAL TRANSFER PRINTABLE GLOSSY CLEAR POLYPROPYLENE LABEL STOCK

Q: What are the primary industrial applications for Brady B-521 (THERMAL TRANSFER PRINTABLE GLOSSY CLEAR POLYPROPYLENE LABEL STOCK)?

Brady B-521 is a high-performance Clear polypropylene designed specifically for rating plates, asset tags, and industrial equipment identification. It features a Removable engineered for long-term industrial reliability in environments requiring -70°C to 100°C (-94°F to 212°F) performance.

Q: What is the continuous operating temperature range for Brady B-521?

Brady B-521 is rated for continuous service temperatures from -70°C to 100°C (-94°F to 212°F). In laboratory heat-aging tests, it maintains dimensional stability and barcode contrast across broad thermal cycles.

B-521 is a clear polypropylene label stock with removable adhesive, suitable for alphanumeric and barcode applications requiring good solvent resistance, heat resistance, and clean removability.

Material Composition

Clear polypropylene

Adhesive System

Removable

Operating Temperature

-70°C to 100°C (-94°F to 212°F)

Total Thickness

—

Industrial Safety & Asset Marker

B-521 Application & Installation Blueprint

Heavy-Duty Industrial Safety & Identification Marker • Physical application tolerances and surface engineering

Industrial Fit Certified

Installed in real-world industrial environment

Standard Industrial Marking Procedure

1Ensure application surface is dry and free of loose particulate or heavy oil.

2Peel and apply with steady firm pressure from center to edge.

3Allow 24 hours for ultimate cross-linked adhesion strength.

Engineering Tolerance: Engineered to withstand standard industrial plant environmental conditions and indoor/outdoor temperature swings.

Substrate Compatibility & Adhesion Matrix

Smooth Metals & Stainless Steel

Standard Bond (5/5)

Rigid Thermoplastics & ABS

Standard Bond (4.8/5)

Painted Metal Cabinets

Standard Bond (4.8/5)

Glass & Smooth Composite

Standard Bond (4.8/5)

Tested Environmental Survivability

Industrial Plant Temperature SwingsDust, Grease & Mild FluidsStandard Abrasion & RubbingLong-Term Legend Legibility

Recommended Field & Shop Tools:

i3300 / i5100 Benchtop PrinterM210 / M610 Handheld ToolStandard Thermal Ribbon

Orderable Part Numbers, Packaging & Distributor SKUs

Official Brady SKUs, roll dimensions, package quantities, list pricing, Grainger part numbers, and printer compatibility for B-521.

Popular B-521 Formats

Standard industrial rolls and die-cut sizes with unit cost breakdown

#1 Popular Choice

Standard Part

THT-17-521-3

1 in H x 2 in W

Roll of 3000 Labels

Roll / Pack Total:$158.99 USD

Normalized Unit Cost:$0.053/label

Material Area Cost:$0.03/sq in

Supported Hardware:

i5100i7100i7500+1

#2 Standard Format

Standard Part

THT-19-521-1

2 in H x 3 in W

Roll of 1000 Labels

Roll / Pack Total:$146.99 USD

Normalized Unit Cost:$0.15/label

Material Area Cost:$0.02/sq in

Supported Hardware:

i5100i7100i7500+1

#3 High Capacity

Standard Part

THT-59-521-10

0.5 in H x 1 in W

Pack of 2 Rolls

Roll / Pack Total:$200.99 USD

Normalized Unit Cost:$0.020/label

Material Area Cost:$0.04/sq in

Supported Hardware:

i5100i7100i7500+1

All 6 Orderable Part Numbers

Pricing: $146.99 – $215.99 USD

Catalog SKU	Dimensions	Packaging / Qty	List Price & Unit Cost	Order MOQ	Compatible Printers
THT-17-521-3 UPC: 754473645472	1 in H x 2 in W	Roll of 3000 Labels	$158.99 USD $0.053/label ($5.30/100) $0.03/sq in	1 ROL Standard Order	i5100i7100+2
THT-19-521-1 UPC: 754473645489	2 in H x 3 in W	Roll of 1000 Labels	$146.99 USD $0.15/label ($14.70/100) $0.02/sq in	1 ROL Standard Order	i5100i7100+2
THT-59-521-10 UPC: 754473645434	0.5 in H x 1 in W	Pack of 2 Rolls	$200.99 USD $0.020/label ($2.01/100) $0.04/sq in	1 PAK Standard Order	i5100i7100+2
THT-12-521-10 UPC: 754473645526	0.437 in H x 0.5 in W	Roll of 10000 Labels	$148.99 USD $0.015/label ($1.49/100) $0.07/sq in	1 ROL Standard Order	i5100i7100+2
THT-5-521-10 UPC: 754473645502	0.5 in H x 1 in W	Roll of 10000 Labels	$172.99 USD $0.017/label ($1.73/100) $0.03/sq in	1 ROL Standard Order	i5100i7100+2
THT-18-521-3 UPC: 754473645540	1 in H x 3 in W	Roll of 3000 Labels	$215.99 USD $0.072/label ($7.20/100) $0.02/sq in	1 ROL Standard Order	i5100i7100+2

Quality Assurance, Storage & Regulatory Compliance

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

Shelf Life & Warehouse Storage

Expected Shelf Life: 1 Year 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: -70°C to 100°C (-94°F to 212°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)
Dielectric Breakdown	ASTM D 1000 / ASTM D 2671	9625 Volts/mil	—

Thermal Transfer Ribbon Compatibility

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

Recommended Thermal Transfer

Non-printable hardware, tag, or pre-printed material.

* 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
10% Sodium Hydroxide Solution	Tested	Tested
10% Sulfuric Acid solution	Tested	Tested
3% Alconox® Detergent Solution	Tested	Tested
Windex®	Tested	Tested
Isopropyl Alcohol	Tested	Tested
Mineral Spirits	Tested	Tested
Brake Fluid DOT 3	Tested	Tested
Skydrol® 500B-4	Tested	Tested
SAE 20 WT Oil at 70°C	Tested	Tested
MIL 5606A Oil	Tested	Tested
Formula 409® Cleaner	Tested	Tested
Northwoods TM Buzz Saw Citrus Degreaser	Tested	Tested
Deionized Water	Tested	Tested

Environmental & Aging Durability Testing

Environmental Exposure Condition	Observation & Legibility Result
521 THERMAL TRANSFER PRINTABLE GLOSSY CLEAR POLYPROPYLENE LABEL STOCK - Material Spec (Brady B-521) Material family	B-521
Service temperature	-70 to 100 °C

Verified Target Applications & Use Cases

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

Brady B-521 Frequently Asked Questions & Engineering Guide

Verified technical answers on physical adhesion, temperature thresholds, ribbon pairings, and replacement standards for B-521.

Brady B-521 is a high-performance Clear polypropylene designed specifically for rating plates, asset tags, and industrial equipment identification. It features a Removable engineered for long-term industrial reliability in environments requiring -70°C to 100°C (-94°F to 212°F) performance.

Brady B-521 is rated for continuous service temperatures from -70°C to 100°C (-94°F to 212°F). In laboratory heat-aging tests, it maintains dimensional stability and barcode contrast across broad thermal cycles.

Need Custom Engineering Validation for Brady B-521?

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

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