Kester Plastic Rosin Core Flux Data Sheet

®

General
Information

Application

Physical
Properties

Residue
Properties
& Removal

Health
& Safety

For over seventy years, Kester Plastic Rosin Core Solder has dominated the field of pure
rosin core solders. Kester Plastic Rosin is made from purest grade WW gum rosin without
additives. This formulation makes Plastic Rosin Core completely non-corrosive, electrically
non-conductive and fungus resistant.

Kester Plastic Rosin Core is used for applications where active flux is not permitted and
critical electronic assemblies are involved. Kester Plastic Rosin Core is classified as Type
ROL0 flux under IPC-ANSI/J-STD-004 Joint Industry Standard.

Specific Gravity
LLL-R-626
Copper Mirror Corrosion Test
Chlorides and Bromides Test
Water Extract Resistivity

The residue of Kester Plastic Rosin Core Solder is non-corrosive, non-conductive, and
moisture and fungus resistant under normal conditions of use. When exposed to
environments with elevated temperature and humidity (100°F, 94% relative humidity) for 72
hours, there is no evidence of corrosion caused by the flux residue.

This mild property of the residue permits leaving the flux on the assembly for most
applications. If the assembly operating temperature is above the melting point of the rosin
(160°F), the residue will become tacky and more conductive than at room temperature.
When required, the flux residue can be removed with Kester 5240 Rosin Residue Remover
or 5768 Bio-Kleen Aqueous Saponifier.

This product, during handling or use, may be hazardous to health or the environment. Read
the Material Safety Data Sheet and warning label before using this product.

Plastic Rosin Core Flux

Non-Activated Rosin

for Cored Solder Wire

1.07 (calc.)
Class A, Type 1, Grade WW
Pass
Pass
300K ohm-cm (typical)