Shrinkage is a function of temperature: the higher the temperature, the higher the
shrinkage. Shrinking temperature ranges from approximately 85°C (185°F) to 190°C
(374°F), with a typical shrinking temperature of 150°C (302°F) recommended for most
applications. Unrestricted, the tubing will shrink both radially and axially. In
most cases, the best overall performance is achieved with minimal shrinkage (less
than 15-20%) except when the Drawing Process is used as described below, or unless
axial shrinkage is restricted. Restricting axial shrinkage is accomplished by holding
the ends of the heat shrink tube during the heating process to prevent the tube from
shrinking in length. This will result in radial shrinkage up to 50% or more depending
on temperature. See our
catalog
or call us for proper sizing.