Manson Alley-K Fiberglass Pipe Insulation

Alley-K without the all service jacket

  • Preformed pipe insulation in cylindrical form
  • 36” sections
  • Intended as a thermal insulation for hot and cold service piping
  • May be used for light industrial applications.

Glass Mineral Wool Pipe Insulation

ALLEY-K is a preformed pipe insulation composed of high quality glass fibers, bonded together with a thermosetting resin. The 36” pipe sections are available with or without the all service jacket (ASJ). Our all service vapor retarder jacket (ASJ) reinforced with glass fibers comes with a factory applied pressure sensitive self-sealing lap closure system (SSL). Butt strips are also supplied.


ALLEY-K Pipe Insulation is intended as a thermal insulation for hot and cold service piping. Typical uses include domestic hot and cold water, hot water heating, high temperature, dual temperature, steam, condensate and refrigerated lines. As a component of a suitable insulation system, plain ALLEY-K Pipe Insulation may be used for light industrial applications, while ALLEY-K with ASJ jacket may be used for commercial and institutional usage.

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Product Description


  • Greenguard Certification
    – Greenguard GOLD certified for superior indoor air
    quality performance
    – Over 50% post-consumer recycled glass
    This product is tested and certified to meet EUCEB requirements.
  • Temperature Limitation (ASTM C 411)
    Up to 850°F (454°C)
  • Alkalinity (ASTM C 871)
    – Less than 0.6% as Na2O
    – pH between 7.5 and 12.0
  • Corrosiveness (ASTM C 665)
    No greater than sterile cotton
  • Water Vapor Sorption (ASTM C 1104)
    2% or less by volume

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General Insulation Company Inc. is an insulation supplier / insulation distributor that stocks and fabricates a wide variety of industrial and commercial air barrier, vapor barrier, moisture and water barrier products for the construction market.

Manson Alley-K Pipe Insulation Technical Data Sheet

Manson Alley-K Pipe Insulation Safety Data Sheet

Alley K Environmental Transparency Report

Alley K Recycled Content Validation Summary