Brady BT-8611: Tsoft3-40 Thermally Conductive Material Gap Filler
TSOFT3-40 is a thermally conductive material designed for use between transistors and heat sinks, offering low thermal resistance and electrical insulation without the need for thermal grease.
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
40 mils (0.0040 in)
1.016 mm
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.
No standardized ASTM chemical dip/rub test data is published on the official Brady TDS for BT-8611.
Environmental & Aging Durability Testing
Environmental Exposure Condition
Observation & Legibility Result
40 Thermally Conductive Material Gap Filler - Material Spec (Brady BT-8611)
Material family
BT-8611
40 is a thermally conductive material designed for use between transistors and heat sinks, offering low thermal resistance and electrical insulation without the need for thermal grease.
## Verified specifications
- Thickness
40mil (1mm)
Verified Target Applications & Use Cases
Industrial rating plates, asset identification, and electrical component labeling.
Verified technical answers on physical adhesion, temperature thresholds, ribbon pairings, and replacement standards for BT-8611.
Brady BT-8611 is a high-performance Industrial substrate 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 standard industrial operating range performance.
Brady BT-8611 is rated for continuous service temperatures from standard industrial operating range. In laboratory heat-aging tests, it maintains dimensional stability and barcode contrast across broad thermal cycles.
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