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Gray silicone-coated fiberglass insulated pipe jacket, 18 by 18 inches, 3 inches thick

Unitherm

Unitherm IW1818 insulated pipe jacket 18×18 in 3 in thick R.48 900 °F gray

SKU CH-Y71C-12C4W

Insulated pipe jacket fits straight pipe sections 6–13 in circumference with silicone-coated fiberglass cloth rated to 900 °F

  • Product colorGray
  • Product typePipes, Valves & Fittings
  • Insulates pipes up to 900 °F with fiberglass and mineral wool
  • Fits 6 in to 13 in circumference using quick-release fabric flap and wiretwists
  • 18 in × 18 in cover with 3 in thickness for straight pipe sections
  • Silicone-coated fiberglass cloth jacket resists industrial heat and meets OSHA standards
  • R-value 0.48 thermal resistance reduces heat loss on valves and fittings

Industrial Insulation Jacket for Straight Pipe

The Unitherm IW1818 is a silicone-coated fiberglass cloth jacket designed to insulate straight pipe sections in industrial environments. It combines a fiberglass and mineral wool core with a quick-release fastening system for secure, repeatable installation. The gray cover measures 18 inches wide by 18 inches long with a 3-inch wall thickness.

Fits Pipes Between 6 and 13 Inch Circumference

This jacket accommodates straight pipe sections with a minimum circumference of 6 inches and a maximum of 13 inches. The R-value is 0.48, providing thermal resistance for high-temperature service up to 900 degrees Fahrenheit. Selecting the correct size depends entirely on matching your pipe circumference to this range.

Quick-Release Flaps Speed Up Maintenance

The fastening system uses fabric flaps and wiretwists that open and close without tools. This allows technicians to remove and reinstall the jacket rapidly for inspection or repair of the underlying pipe. The design meets OSHA standards for industrial use and ships as a single 1818 model unit.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $119.99
Pricier than about 77% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameUNITHERM
Product colorGray
Product typePipes, Valves & Fittings

Questions about this item

What does the R-value of 0.48 mean once this jacket is wrapped on a pipe?

The R-value of 0.48 indicates the thermal resistance of the 3 in thick fiberglass and mineral wool insulation, reducing heat loss from the pipe surface at operating temperatures up to 900 °F.

Which standard does the OSHA listing cap in practice for this cover?

The OSHA reference confirms the jacket meets occupational safety requirements for hot-surface protection, limiting external touch temperatures on pipes up to 13 in circumference.

What pipe diameters fit inside the 18×18 in cover with its 3 in wall?

The jacket accommodates straight pipe sections from 6 in to 13 in circumference, secured by the quick-release fabric flap and wiretwists.

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