H.B. Fuller WB-2338MX-RB001

H.B. Fuller WB-2338MX-RB001 is a water-based envelope back seam gum. It is designed for high speed machines, rheology designed for minimal throwing and increased stability and bonds a wide variety of paper stocks without staining or bleedthrough. This grade is typically used in envelope back seam applications.

Product Type: Contact Adhesive, Waterborne Adhesive

Application Area: Envelope

Compatible Substrates & Surfaces: Paper

Technical Data Sheet
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Identification & Functionality

Features & Benefits

Product Characteristics
  • Designed for high speed machines
  • Rheology designed for minimal throwing and increased stability
  • Bonds a wide variety of paper stocks without staining or bleedthrough

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Typical Applications

Envelope back seam applications.

Suitable Substrates

Typical paper stocks used in envelope manufacturing.

Application Instructions

Ideal for high speed machines such as F.L. Smithe RA and W&D 527.

Cleaning Instructions

Best to clean before drying. If dry, use hot water and scraper.


Typical Properties
ValueUnitsTest Method / Conditions
Solids Content (Non volatiles)61%-
Viscosity (RVF, Sp3, 20rpm, at 85°F)1500cPs-

Safety & Health

Safety Information

Avoid contact with skin and eyes. Product will irritate eyes if contact occurs. Skin irritation is possible on prolonged or repeated contact.

Packaging & Availability

Regional Availability
  • North America

Storage & Handling

Shelf Life
90 Days
Storage Conditions

For best performance, the product should be stored and used at 65°F – 85°F. Do not freeze. Ship and store at temperatures above 40°F.