H.B. Fuller® BC-641 is a specialized adhesive designed for industrial bonding applications that require exceptional adhesion and durability. It provides superior performance under demanding conditions, making it ideal for automotive, packaging, and electronics industries. This adhesive ensures reliable and long-lasting bonds, even in harsh environments, offering consistent performance. Its versatility and strength make it a preferred choice for various manufacturing processes, ensuring durability and adhesion over time in industrial applications.

Product Type: Hot Melt Adhesive

Application Area: Brochures, Catalogues, Paperbacks, Telephone Directories

Compatible Substrates & Surfaces: Paper

Features: Excellent Melt Stability, Good Adhesion, High Ink Resistance, Slow Setting

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Ready-to-Use Product Features
Product Characteristics
  • Slow speed of set
  • Good melt stability
  • Excellent adhesion properties
  • High ink resistance

Applications & Uses

Markets
Applications
Application Area
Compatible Substrates & Surfaces
Typical Applications

Graphic Arts: Side gluing of brochures, paperbacks, telephone directories and catalogues with difficult to bond covers. Can also be used for joint gluing applications and some EOL packaging.

Suitable Substrates

All paper qualities.

Application Instructions

Application temperature: 350°F

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Mettler Softening point157 - 177°F-
Viscosity (at 350°F)1740 - 2610cPs-
Viscosity (at 300°F)4900cPs-
Molten Gardner Color2 - 6--

Safety & Health

Safety Information

To minimize the risk of burns, we recommend the use of eye protection and protective clothing when working near a hot melt applicator. To minimize the risk of flammable vapors, do not exceed a melt temperature above 400°F. Prevent the build-up of vapors. Extinguish all sources of ignition during hot melt use.

Packaging & Availability

Regional Availability
  • North America

Storage & Handling

Shelf Life
730 days
Storage Conditions

Clean and dry conditions below 140°F.