Harmonization Code : 8001.20 |   Unwrought tin: Tin alloys
Main features
  • SAC 305 - No refrigeration
  • Low voiding
  • Fine nozzle Jet dispensing

Product Description

LOCTITE GC 50 solder paste is a halogen free, no-clean, Pb-free solder paste specially designed to provide enhanced stability when used in jet dispensing and other dispensing applications. This SAC 305 alloy comes in T4 and T5 powders, with T5 being having a fine particle size distribution, making it ideal for small components.

LOCTITE GC 50 provides long-term stability over a wide range of temperature conditions. It is stable in the ejector head for at least 1 week (up to 28°C/82°F) and remains suitable for use in time/pressure and auger pump dispensing systems. Its stable room temp sustainability, enables void-free packaging for improved process consistency and sustainability as well as excellent soldering performance in air or in nitrogen.

LOCTITE GC 50 has good resistance to graping in demanding reflow profiles and achieves and IPC Class III in voiding performance. Its post reflow residues readily removed with electronics industry solvents and it is compatible with Pb-free printing pastes in a solder additive process, eliminating the need for step-stencil or preforms.

Product Family
10cc EFD 30cc EFD 40cc IWAS

No longer available

This product is no longer available or will become obsolete soon. Please contact us so we can recommend an alternative product.

Technical Specifications

General Properties
Alloy Type
Alloy Type
A metallic element type
Metal Loading
Copper (Cu)
Copper (Cu)
Copper is a soft malleable and ductile metal with a very high thermal and electrical conductivity.
0.5 %
Silver (Ag) 3 %
Tin (Sn) 96.5 %
Shelf Life
Shelf Life
Shelf life is the amount of time after manufacturing that a product is guaranteed to retain its properties.

It differs vastly per product and it is based on temperature and storage conditions.

The properties can be guaranteed for the temperature and time range indicated on the TDS since those are the ones tested to be the best for the product.
Shelf Life @ 25°C 180 days
Physical Properties
Thixotropic index
Thixotropic index
Thixotropic Index is a ratio of a material s viscosity at two different speeds in Ambient temperature, generally different by a factor of ten.

A thixotropic material s viscosity will decrease as agitation or pressure is increased. It indicates the capability of a material to hold its shape. Mayonnaise is a great example of this. It holds its shape very well, but when a shear stress is applied, the material easily spreads.

It helps in choosing a material in accordance to the application, dispense method and viscosity of a material.
Viscosity is a measurement of a fluid’s resistance to flow.

Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.

A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.

The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
110000 mPa.s
Thermal Properties
Melting Temperature
Melting temperature 217 °C

Additional Information

Optimal storage: 5 to 25°C (41 to 77°F)
Storage information may be indicated on the product container labelling. Material removed from containers may be contaminated during use. Do not return products to the original container.

Shelf Life:
Provided that LOCTITE GC 50 is stored in the original container, shelf life of 180 days at 5 to 25 °C (41 to 77°F) can be expected.


GC 50 - T5 powder properties