Covalence Shrink Sleeves (formerly Raychem)

Seal For Life’s Covalence brand offers a comprehensive range of heat shrinkable products designed for corrosion prevention, mechanical protection, and sealing of pipelines, including field joints and pre-insulated pipe systems. Below is an overview of their main product offerings and applications:

• Covalence provides both 2-layer and 3-layer heat-shrinkable sleeves.

• These sleeves feature irradiation cross-linked polyethylene or polypropylene backings, combined with adhesive layers (either visco-elastic mastic or co-polymer hot melt) tailored for different pipeline operating temperatures and environments.

• The 3-layer systems often include an epoxy primer for enhanced adhesion and are compatible with modern multi-layer mainline coatings, creating a monolithic protection system.

• : A two-layer field-joint coating system designed for corrosion protection of pipelines operating at ambient temperatures. It is among the most widely used solutions for girth weld protection.

• : High-performance, three-layer sleeves with epoxy primer, designed for pipelines with higher operating temperatures and demanding environments. These sleeves offer excellent resistance to cathodic disbondment, hot water immersion, and soil/thermal movement stresses - HTLP60 & HTLP80

• : Specifically engineered for directional drilling and applications requiring extra mechanical strength - DIRAX & CCS Material used to make Caseals and Flangeseals.

• : Designed to provide durable sealing solutions for pre-insulated pipe joints, protecting against moisture ingress and maintaining thermal integrity.

• : Includes joint casings, foaming hole closures, primary joint foam seals, end caps, and sealants to support a wide range of pipeline configurations and field conditions.

• High electrical resistance and low permeability for optimal corrosion prevention.

• Designed for easy installation with minimal tools and surface preparation.

• Approved by major testing agencies worldwide, ensuring suitability for diverse field conditions and compliance with global standards such as ISO, EN, AWWA, NACE, and GOST.

• Proven performance record in major pipeline projects globally, including oil, gas, and water transmission lines.

Product Type	Layers	Key Application	Notable Features
WPCT	2	Field joint corrosion protection	Ambient temperature pipelines
HTLP Series	3	High-temp, high-stress environments	Epoxy primer, soil/thermal resistance
Fiberglass-Reinforced Sleeves	2–3	Directional drilling, mechanical stress	Extra strength, abrasion resistance
Pre-Insulated Pipe Sleeves	2–3	Pre-insulated pipe joints	Moisture and thermal protection

Covalence’s heat shrinkable products are trusted globally for their reliability, versatility, and ease of installation, making them a leading choice for pipeline protection and sealing needs.