H.B. Fuller GM 30 is an anaerobic adhesive with reactive chemistry. It is a red anaerobic flange sealant and gasket-maker gel. It offers higher temperature stability and is resistant to shock and vibration. It is used for sealing close-fitting joints between rigid metal flange assemblies in flange and gasket sealant applications.

Product Type: Anaerobic Adhesive, Reactive Adhesive

Application Area: Flanges, Gaskets

Chemical Family: Dimethacrylate Ester

Features: Heat Resistance, Migration Resistant, Shock Resistant, Vibration Resistance

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Markets
Applications
Application Area
Cure Method
General Instructions
  • Surfaces to be bonded should be clean and dry and free of grease.
  • The product should be applied in enough quantity to fill all engaged threads.
  • The product performs best in thin bond gaps. Very large gaps may affect the cure speed and overall strength.
  • Good contact is essential.
  • An adequate bond develops in 15 to 45 minutes, and maximum strength is attained in 24 hours.
  • This product is not recommended for use in pure oxygen environments and/or oxygen-rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials.
  • This product is not designed for plastics, particularly thermoplastics, where stress cracking of the plastic could result.
  • It is recommended to confirm compatibility of the product with all substrates prior to use.

Properties

Color (Properties)
Physical Form
Appearance
Red thixotropic gel
Technical Data
ValueUnitsTest Method / Conditions
Viscosity (at 20°C to 25°C, 0.5 rpm)750,000 - 1,500,000cPsBrookfield
Specific Gravity1.12--
Cured Properties
ValueUnitsTest Method / Conditions
Full Cure Conditions (at 25°C)24.0hours-
Cure AppearanceRed Solid--
Locking StrengthMedium--
Pin/Collar Shear Strengthmin. 725psi-
Service Temperature-55 to 150°C-
Uncured Properties
ValueUnitsTest Method / Conditions
Flash Pointmin. 93°C-
Gap Fill Unprimed0.01inch-
Gap Fill Primed0.05inch-
Storage Condition20.0°C-
Curing Performance

The rate of cure will depend on environmental conditions and the substrates used. The gap of the bond line will affect set speed. Smaller gaps tend to increase set speed. Activators may be applied to further improve set speed, but may also impair overall adhesive performance.

Technical Details & Test Data

Set Time on Various Substrates

H.B. Fuller GM 30 - Set Time on Various Substrates - 1

Hot Strength (%RT strength, tested at temperature)

H.B. Fuller GM 30 - Hot Strength (%RT strength, tested at temperature) - 1

Heat Aging (aged at temperature indicated and tested at 22°C)

H.B. Fuller GM 30 - Heat Aging (aged at temperature indicated and tested at 22°C) - 1

Packaging & Availability

Regional Availability
  • North America

Storage & Handling

Shelf Life
12 months
Storage Conditions

H.B. Fuller GM 30 should be stored unopened in a cool, dry place out of direct sunlight. Products may be refrigerated for improved shelf life, but should be brought back to room temperature before use.