Elastomeric Foam Insulation: A Comprehensive Benefits ...

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While closed-cell elastomeric foam insulation has been in use for decades, its numerous benefits continue to garner attention, especially with the latest technological advancements in insulation materials. Recently indexed articles highlight the versatility and efficiency of this insulation type, expanding its applications in both commercial and residential settings.

Closed-cell elastomeric foam insulation remains a leading choice for cold (below-ambient) mechanical pipe and equipment applications, especially in settings demanding energy efficiency and moisture control. As industry professionals increasingly prioritize sustainability, the appeal of elastomeric insulation's low-VOC emissions and recyclability has come to the forefront.

This blog post aims to address frequent inquiries regarding the performance properties and concerns associated with elastomeric foam insulation received from property owners, engineers, and contractors.

What is Elastomeric Foam Insulation?

Elastomeric foam insulation is essentially a synthetic rubber insulation characterized by its closed-cell structure, commercially available in various formats including tubes, sheets, and rolls. One of its standout features is the smooth outer skin, acting as a built-in vapor retarder, which enhances its adaptability in various environments.

This type of insulation is renowned for its flexibility, making it resistant to cracking and breakage often associated with rigid insulation types, such as cellular glass, polyiso, and phenolic foam. Moreover, this insulation option is fiber-free and emits minimal VOCs, contributing to a healthier indoor environment.

Alternative Names for Elastomeric Foam Insulation

Known by several names, elastomeric foam insulation includes terms such as closed-cell elastomeric foam insulation, flexible elastomeric cellular insulation, unicellular insulation, both refrigerant and plumbing pipe insulation, and HVAC pipe insulation.

Typical Characteristics of Elastomeric Foam Insulation

This insulation type is especially effective in managing condensation on cold mechanical systems due to its intrinsic low water vapor permeability and built-in vapor retarder. By mitigating the risk of corrosion under insulation (CUI), elastomeric foam insulation substantially lowers maintenance costs associated with moisture damage.

Elastomeric insulation maintains its thermal efficiency over time, unlike open-cell fibrous insulation, which may become a food source for mold if moisture penetrates.

Key factors for determining the appropriate insulation thickness include pipe fluid temperature, ambient conditions, and whether protection against UV exposure is necessary.

Closed Cell Elastomeric Foam or Fiberglass Insulation?

Though fiberglass insulation is commonly used due to its affordability and variety, it poses challenges in moisture control, leading to efficiency loss and potential corrosion. Conversely, closed-cell elastomeric foam insulation has established a proven track record of nearly 70 years in effectively insulating cold piping systems in the U.S.

In comparison, elastomeric insulation does not require an outer jacket, except in cases of direct UV exposure, enhancing its cost-effectiveness.

• Offers excellent moisture and UV resistance.

• Fiber-free and low VOC emissions make it an environmentally friendly choice.

• Non-food source for mold growth.

The Importance of Insulation Adhesives and Tapes

Mechanical insulation systems rely heavily on high-quality adhesives and tapes for optimal performance. Ensuring airtight seals at joints helps maintain system integrity and efficiency, especially in low-temperature applications.

Water vapor penetrating insulation can lead to serious issues such as CUI, necessitating effective sealing measures with adhesives designed for specific insulation products, ensuring durability and long-lasting performance.

Elastomeric Foam Insulation Applications

There’s a broad array of applications for elastomeric foam insulation, including:

• Refrigerant piping
• HVAC and VRF piping
• Chilled water systems
• Domestic hot and cold water lines
• Duct wraps
• Acoustic applications

Recent articles emphasize the need for protective measures for elastomeric insulation in UV exposed areas. High-performing elastomeric materials, such as EPDM, are championed for their slow degradation over time when properly coated or jacketed.

Fire Safety Requirements

Manufacturers of closed-cell elastomeric insulation must conform to stringent fire safety standards, making them highly suitable for applications where fire safety is a concern, such as in plenum-rated areas in HVAC systems.

Preventing Corrosion Under Insulation (CUI)

The growing understanding of CUI emphasizes the importance of selecting correct insulation thickness and ensuring effective sealing methods for insulation systems. By using elastomeric foam insulation paired with quality adhesives, project teams can significantly mitigate CUI risks, contributing to the longevity and reliability of piping systems.

Wrapping it Up

Overall, closed-cell elastomeric insulation offers numerous benefits, particularly in thermal control and moisture management. The choice of this insulation type can yield favorable life cycle costs for building owners while also providing a safer and healthier environment for building occupants.

If you're interested in more information, please visit our rubber foam thermal insulation page or consult Huichen for expert advice.