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Johns Manville Micro-Lok® HP fiberglass pipe insulation is manufactured using the latest technology and our unique in-line manufacturing process. This process results in a uniform fiberglass core that delivers consistent performance during fabrication and installation. In addition, our proprietary auto-jacketer ensures consistency during production and installation resulting in a tighter jacket with a cleaner finished appearance. Micro-Lok HP delivers thermal performance you can count on, while meeting all industry performance requirements. This assures the building owner, mechanical engineer and contractor that Micro-Lok HP will deliver the performance you’ve come to expect from JM products throughout the life of the mechanical system.

Service Temp (Nominal): 850° F
Thermal Conductivity (k): 75° F (24° C); 0.23
Recycle Content: 32% (post consumer)
Greenguard: Gold

Johns Manville Micro-Lok® HP plain fiberglass pipe insulation is manufactured using the latest technology and our unique in-line manufacturing process and is available without a vapor retarder. Our in-line manufacturing process results in a uniform fiberglass core that delivers consistent performance during fabrication and installation. Micro-Lok HP delivers thermal performance you can count on, while meeting all industry performance requirements. This assures the building owner, mechanical engineer and contractor that Micro-Lok HP will deliver the performance you’ve come to expect from JM products throughout the life of the mechanical system.

Service Temp (Nominal): 850° F
Thermal Conductivity (k): 75° F (24° C); 0.23
Recycle Content: 27% (post consumer)

Micro-Lok^® HP E3 Compression Pack^® is an Economical, Efficient and Environmentally friendly way to package our Micro-Lok^® HP Plain Pipe insulation. Designed to better protect the product inside, Micro-Lok^® HP E3 Compression Pack minimizes damage during transport. Because the pack forms cube-shaped units, product can be shipped and stored more efficiently. Once opened, pipe sections bounce back into their cylindrical form and retain their original insulation strength. Continuing JM’s dedication to sustainability, the label and packaging is now 100% recyclable, resulting in less job site waste. 

Micro-Lok®​​​​​​​ HP Ultra is a specialized, premium performance fiberglass pipe insulation. As part of the Micro-Lok HP product line, Ultra has the most consistent fiberglass core available in the market. We have coupled this with a factory-applied, polypropylene-coated, ASJ vapor retarder jacket with 100 Psi puncture-resistance. This design allows the product to be used in an environment of intermittent or temporary exposure to transient moisture or conditions that are similar to those in an open construction site. The SSL closure system has been designed to adhere securely to the polypropylene-coated jacket. It can be applied at ambient temperatures starting at 20°F and above, and will remain intact even in high temperatures and humidity. This assures the building owner, mechanical engineer and contractor that Micro-Lok HP Ultra will deliver the performance you’ve come to expect from JM products throughout the life of the mechanical system.

Service Temp (Nominal): 850°F
Thermal Conductivity 75°F (24°C): 0.23
Recycled Content: 32% (post-consumer)
Greenguard: Gold

TRYMER® 25-50 PIR Insulation offers the same, great thermal performance of TRYMER® PIR but with a lower flame/smoke rating that meets the ASTM 84 Fire Hazard Classification Rating. TRYMER® 25-50 has an ASTM E84 flame spread/smoke developed performance of  <25/50 at up to 1.5" thickness which makes it ideal for use in chilled water applications or anywhere flammability is the greatest concern and governed by codes but where energy efficiency and water resistance are still important.

Johns Manville Micro-Lok® has been a trusted mechanical insulation solution for mechanical engineers, contractors and building owners for more than 40 years. Our flame-attenuated fiberization process gives Micro-Lok excellent thermal properties and a core that provides ease of fabrication for the contractor.

Service Temp (Nominal): 850° F
Thermal Conductivity (k): 75° F (24° C); 0.23
Greenguard: Gold (ASJ)