Heat-shrinkable sleeve (or commonly "shrink sleeve") is a corrosion protective coating for pipelines in the form of a wraparound or tubular sleeve that is field-applied.

Heat-shrinkable sleeves are the most widely used technology in the world today for field-girth weld corrosion protection because they’re easy to install, provide excellent protection, and are cost-effective.

Heat-shrinkable sleeves are then applied onto the cutback at the field weld, or field joint, during the construction of a pipeline. Heat-shrink sleeves have an adhesive that sticks the sleeve to the material and the factory-applied mainline coating, and also acts as a corrosion protective layer. The backing provides mechanical protection against abrasion and soil stress forces after the pipeline is buried.

Properly specified and applied heat-shrink sleeves can provide corrosion and mechanical protection that is equal to or superior to the mainline coating, be it a tape, epoxy or multi-layer polyolefin. It resists impact, abrasion and ultraviolet light as well as cathodic disbondment and dielectric breakdown.