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Description

FlexTherm® sheet insulation is an environmentally friendly, CFC-free, flexible elastomeric thermal insulation. It is black in color, and supplied as flat sheets (36" x 48") in standard thicknesses of 1/8" thru 2". It is supplied skin two sides in 1/4" and above. FlexTherm® sheet insulation is also available in rolls, with a standard roll width of 48". FlexTherm® sheet is non-porous, non-fibrous and resists mold growth.

Applications

FlexTherm® sheet insulation is used to retard heat gain and prevent condensation or frost formation on cold equipment, ducts, or large O.D. pipes. It also effectively retards heat loss when used on hot equipment, ducts, or large pipes. FlexTherm® sheet can be used as duct covering.

FlexTherm® sheet insulation is recommended for applications ranging from -70°F to 220°F (-57°C to 104°C) when used as pipe insulation where only the seams and butt joints are glued. On full adhesion applications, the upper limit is 200°F (93°C).

FlexTherm® sheet insulation has a very tough skin which withstands tearing, rough handling, and severe environmental conditions, and yet is quite flexible for easy installation. FlexTherm® sheet insulation has superior cold weather flexibility.

FlexTherm® sheet insulation thickness has been calculated to control condensation on cold surfaces. Refer to the Submittal sheet for specific recommendations.

Installation

When FlexTherm® sheet insulation is applied to ductwork and equipment, use 100% coverage of an approved contact adhesive. When using a contact adhesive, both surfaces to be joined should be coated and then joined after the adhesive is dry to the touch. Compression joints with adhesive applied should be used on all butt edges. Contact factory for specific installation instructions.

Outdoor Applications

For optimum performance, outdoor applications require 374 Protective Coating or other recommended protective coating, cladding or jacketing. For more detailed information refer to the Installation Guide.

Resistance to Moisture Vapor Flow

The closed-cell structure and unique formulation of FlexTherm® sheet insulation effectively retards the flow of moisture vapor, and is considered a low transmittance vapor retarder. For most indoor applications, FlexTherm® sheet Insulation needs no additional protection.

Additional vapor barrier protection may be necessary for FlexTherm® Seam-Seal when installed on low temperature surfaces that are exposed to continuous high humidity.

Flame and Smoke Rating

FlexTherm® sheet insulation in wall thicknesses of 1-1/2" (38 mm) and below has a flame spread rating of 25 or less and a smoke development rating of 50 or less as tested by ASTM E 84 Method of Testing entitled: “Surface Burning Characteristics of Building Materials.” FlexTherm® sheet is acceptable for use in duct/plenum applications meeting the requirements of NFPA 90A/B.

Numerical flammability ratings alone may not define the performance of products under actual fire conditions. They are provided only for use in the selection of products to meet limits specified, when compared to a known standard.

Specification Compliance

ASTM C 534 Type 2 (sheet), Grade 1
ASTM D 1056-00-2C1
New York City MEA 186-86-M Vol. IV
USDA Requirements

UL 94-5V Flammability Classification (Recognition No. E300774)
ASTM E 84 1-1/2" 25/50-tested according to UL 723 and NFPA 255
Complies with requirements of CAN/ULC S102-M88
STC=17 per ASTM E90

NFPA No. 101 Class A Rating

Meets requirements of NFPA 90A Sect. 2.3.3 for Supplementary Materials for Air Distribution Systems

Meets requirements of ASTM C 411 (Test Method for Hot Surface Performance of High Temperature Thermal Insulation)

Meets requirements of UL 181 sections 11.0 and 16.0 (Mold Growth/Air Erosion.