3/4 in x 48 in x 48 in Calcium Silicate High Temperature Insulation MPN:684700
3/4 in x 48 in x 48 in Calcium Silicate High Temperature Insulation
This high-temperature insulation from Johns Manville provides superior thermal performance in extreme conditions. Made from calcium silicate, it maintains its integrity at temperatures up to 1,700°F, making it ideal for industrial applications such as furnace linings, kiln insulation, and heat exchangers. Its low water vapor absorption and closed-cell structure ensure minimal moisture intrusion, reducing the risk of degradation and maintaining its R-value over time. With a density of 55 lb/cu ft and a thickness of 3/4 inch, it provides excellent insulation in a compact, easy-to-handle package, suitable for use in a variety of industries, including steel, cement, and glass.
Top product features:
- High Temperature Insulation for applications up to 1,700 Degrees F
- Closed cell structure minimizes water vapor absorption
- Thickness of 3/4 in provides insulation with an R Value of 0.77
Top product applications:
- Fireplace Insulation
- High Temperature Furnace Insulation
- Industrial Oven Insulation
High Temperature Insulation, Density 55 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 4 ft, Overall Width 4 ft, R Value 0.77, Thickness 3/4 in, Standards ASTM C656, C795, E119, E136, E72, E84, NFPA251, UL 1479, UL 1709, UL 263, Water Vapor Absorption Minimal
Additional Information
- Country of Origin: US
- Drop Ship Item: Yes
- Blind Ship Eligible: No
- LTL Freight Required: No
- Lead Time: Ships in 270 days
- Minimum Order Quantity: 1
- Unit of Measure: EA
- Package Length: 50.94
- Package Width: 48.88
- Package Height: 1.62
- Package Weight: 112.00
Product info last updated on February 14, 2026 7:23am UTC
Category: Heating Equipment