1 PRODUCT INFORMATION United States COMMERCIAL. 1 PRODUCT NAME. thermax Sheathing 2 Manufacturer BASIC USE. thermax Sheathing is specially Consult your Dow representative about other sizes and lead-time The Dow Chemical Company designed to have a Class A fire requirements. Building Solutions rating and can be used in a 200 Larkin Midland, MI 48674. range of concealed and exposed applications, above and below 4 Technical Data 1-866-583-BLUE (2583) grade. Because of its improved APPLICABLE STANDARDS. Fax 1-989-832-1465 fire performance, thermax thermax Sheathing meets Sheathing is especially appropri- ASTM C1289 Standard ate for hourly rated assemblies.
2 Specification for Faced Rigid 3 PRODUCT thermax Sheathing also has approval in exterior multistory Cellular Polyisocyanurate Thermal Insulation Board, Type I, Description steel stud walls with brick Class 2, which includes: cladding. See IBC Section C203 Standard Test thermax Sheathing is a non-structural, rigid board Methods for Breaking Load insulation consisting of a glass- SIZES and Flexural Properties of Width and length: Block-Type Thermal fiber-reinforced polyisocyanurate 4' x 8', 4' x 9', 4' x 10' Insulation foam core laminated between Edge treatments: C209 Standard Test mil smooth, reflective aluminum Square edge, shiplap Methods for Cellulosic Fiber foil facers on both sides.
3 The glass-fiber reinforcement, along Insulating Board PRODUCT thicknesses and C518 Standard Test Method with chemical modifications, R-values are shown in Table 1. for Steady-State Thermal contributes to improved fire Not all products are available Transmission Properties by performance and dimensional in all parts of the country. Means of the Heat Flow stability. thermax Sheathing Additional PRODUCT sizes are Meter Apparatus can be installed exposed to the available by custom order. D1621 Standard Test interior without a thermal barrier. Method for Compressive TA B L E 1 Properties of Rigid Cellular thermax Sheathing R-Values Plastics Nominal Foam Thickness, in.
4 Stabilized R-Value(1, 2). D2126 Standard Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging E96 Standard Test Method for Water Vapor Transmission thermax Sheathing of Materials D1623 Standard Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics (1) R means resistance to heat flow. The higher the R-value, the greater the insulating power. Stabilized R-values @ 75 F mean temperature determined in accordance with ASTM C518. (2) R-values expressed in ft2 h F/Btu. Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow PRODUCT INFORMATION .
5 TA B L E 2 TA B L E 3. Physical Properties of thermax Sheathing Chemical Resistance of thermax Sheathing Property and Test Method Value Acid, inorganic Not recommended Compressive Strength(1), ASTM D1621, psi, min. Flexural Strength, ASTM C203, psi, min. Acid, organic Excellent Dimensional Stability, ASTM D2126, % linear change, max. Alcohol Excellent Water Absorption, ASTM C209, % by volume, max. Asphalt, water-based Good Water Vapor Permeance, ASTM E96, perms, max. < Bases (caustics) Poor Maximum Use Temperature, F 250. Brines and other salts Excellent (1) Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first.
6 Cements and mortar Poor Gases, carbon dioxide (CO2) Excellent Gasoline Excellent PHYSICAL/CHEMICAL CODE COMPLIANCES. Hydrocarbons Excellent PROPERTIES thermax Sheathing complies Insecticides Excellent thermax Sheathing exhibits with the following codes: Kerosene Excellent the properties and characteristics International Residential Mineral oil USP Excellent indicated in Table 2 when Code (IRC) and International Naphtha Excellent tested as represented. Building Code (IBC); see Paints, alcohol-based Excellent For chemical resistance ICC-ES NER-681 Paints, water-based Excellent properties of thermax FM 4880 Wall-Ceiling Polyglycols, Excellent Sheathing, see Table 3.
7 Construction Metal-Faced including propylene glycol Class 1 Fire Rated to Max. 30' Water (1) Excellent ENVIRONMENTAL DATA High, " Thick, 4' Wide, (1) Water may cause discoloration of aluminum facers. thermax Sheathing is manu- When Installed as Described This does not impact the R-value of dry, core insulation. factured with hydrocarbon in the Current Edition of NOTE: This table should be used as a guide only. For design purposes, specific test data on the intended application may blowing agents, which have no FMRC Approval Guide be needed. ozone depletion potential. thermax products are classified by Underwriters Laboratories Inc.
8 (UL) FMVSS No. 302 . FIRE PROTECTION UL 1256 Fire Test of Roof Flammability of Interior thermax products should be . Deck Constructions, Roof Materials Passenger Cars, used only in strict accordance Deck Construction No. 120 Multipurpose Passenger with PRODUCT application and No. 123 Vehicles, Trucks and Buses instructions. thermax UL 723 (ASTM E84) Surface (Docket No. 3-3; Notice 4). products, when used in a Burning Characteristics of Miami-Dade NOA building containing combustible Building Materials Interior Insulation on CMU. materials, may contribute to Block The following designs are 1, the spread of fire. For more Miami-Dade NOA 2, 3 or 4 hour wall rated INFORMATION , consult MSDS Insulated Wall assemblies as listed in the UL.
9 And/or call Dow at Miami-Dade NOA Fire Resistance Directory: 1-866-583-BLUE (2583). In an Insulated Roof Assembly U026, U324, U325, U326, emergency, call 1-989-636-4400. U330, U354, U355, U460, U902, U904, U905, U906, Contact your Dow sales rep- U907, V454 resentative or local authorities Fire Performance Evaluation for state and local building of an Exterior Masonry Wall code requirements and related System Incorporating acceptances. thermax Insulation Tested in Accordance With NFPA. 285, 1998 Edition (UBC , intermediate scale . multistory testing). Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow 2.
10 5 Installation 7 Warranty Boards of thermax Sheathing Fifteen-year limited thermal are lightweight and can be warranty. sawed or cut with a knife. They install quickly to walls and ceilings inside and outside of 8 Maintenance purlins, trusses or bar joints. Not applicable. Butt joints must be installed over structural members. Best practice recommendations for 9 Technical Services high-humidity environments Dow can provide technical include continuously sealing INFORMATION to help address the surface of the insulation questions when using at all joints with a Dow joint thermax Sheathing. closure system. Technical personnel are Contact a local Dow available to assist with any representative or access insulation project.