SHAIC HT-350 is a heat shrinkable tube designed for corrosion protection of field-welded joints of plastic coated
steel pipelines. It has a thick crosslinked polyethylene backing coated with butyl rubber based mastic sealant or
hot melt adhesive. When heated the backing layer shrinks and the sealant flows and forms a reliable corrosion
protection seal onto metal and adjacent coating surfaces.
SHAIC HT-350 needs no patch closure and should be slid over the pipe prior to welding the joint. Its unique design
reduces time for handling, positioning and installation of Patch Closure. This minimizes application time and labour
Long-term Corrosion Protection
After heating, formed corrosion protection seal & strong backing provides outstanding waterproofing effect and high
SHAIC HT-350 resists impact, abrasion and ultraviolet light.
Free from penetrating pinholes due to multi-layered structure. Excellent resistance against cathodic disbondment,
No special skills, equipments, patch closure nor primer are needed. Slide the tube over the pipe before welding
the joint. Position the tube over welded, foreign matters free and pre-heated joint. Remove the release liner and
temporarily insert spacing pads between the pipe and the tube at both upper edges of the tube to keep it away
from the pipe and to facilitate the application. Remove spacing pad when the tube is shrunk at the center, and
then move torch circumferentially to heat the left and the right half of the tube. Finish off by heating over the entire
tube vertically to ensure a uniform adhesion and by using a roller or gloved hands to remove wrinkle and air.
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