{"product_id":"johns-manville-638328-1-2-in-x-24-in-x-48-in-calcium-silicate-high-temperature-insulation","title":"Johns Manville 638328 - 1\/2 in x 24 in x 48 in Calcium Silicate High Temperature Insulation","description":"\u003cp\u003eHigh Temperature Insulation, Density 40 lb\/cu ft, Facing Material Unfaced, Flexibility Not Applicable, Foam Cell Type Closed, Form Board, Insulation Color White, Insulation Material Calcium Silicate, Maximum Operating Temperature 1,700 Degrees F, Minimum Operating Temperature 0 Degrees F, Overall Length 24 in, Width 4 ft, R Value 0.52, Thickness 1\/2 in, Standards ASTM C656, C795, E119, E136, E72, E84, NFPA251, UL 1479, UL 1709, UL 263, Water Vapor Absorption Minimal\u003c\/p\u003e","brand":"JOHNS MANVILLE","offers":[{"title":"Default Title","offer_id":43253396701278,"sku":"638328","price":197.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Z_xC0xkcpEx_b0fbbd68-f19e-49b0-9818-17303269bb85.jpg?v=1788374723","url":"https:\/\/nationalboilersupply.com\/products\/johns-manville-638328-1-2-in-x-24-in-x-48-in-calcium-silicate-high-temperature-insulation","provider":"National Boiler Supply","version":"1.0","type":"link"}