CalCoat-127 (1200ºF Insulating and Finishing Cement)

CalCoat-127 is a proprietary blend of hydraulicell nameement, calcium silicate and inorganic mineral fibers, with corrosion inhibitors, that provides a smooth finish over high-temperature insulation. No wire mesh is required. It can also be used as a general-purpose insulating cement, as it is easy to trowel and resists wetting after initial application. One bag will cover a minimum of 30 sq. ft. at 1” (2.8 square meters at 25 mm) thick. CalCoat-127 can be painted with water- or oil-base paints.


Bulk Density ( lb/ft³ )20
Bulk Density ( kg/m² )320.4
Compressive Strength ( kPa )1379
Compressive Strength ( psi )200
Dry Coverage Capacity2.8 m² at 25 mm thick
30 ft² at 1 in thick
Linear ShrinkageLess than 2%
Thermal Conductivity at 200ºF (93ºC) ( BTU-in/hr-ft²-ºF )0.80
Thermal Conductivity at 200ºF (93ºC) ( W/m-ºC )0.115
Thermal Conductivity at 400ºF (204ºC) ( BTU-in/hr-ft²-ºF )0.83
Thermal Conductivity at 400ºF (204ºC) ( W/m-ºC )0.120
Thermal Conductivity at 700ºF (371ºC) ( BTU-in/hr-ft²-ºF )0.96
Thermal Conductivity at 700ºF (371ºC) ( W/m-ºC )0.138


Due to its composition and low thermal conductivity, CalCoat-127 is recommended for finishing use with calcium silicate or perlite insulation in high-temperature piping and equipment applications. Because of its corrosion inhibiting properties, it is especially recommended for industrial processing and power generating facility applications using stainless steel piping and operating at temperatures up to 1200ºF (649ºC).


  • Used in combination with Sproule WR-1200™ Perlite Pipe & Block Insulation, CalCoat-127 provides a superior corrosion-inhibiting system, protecting stainless steel piping against moisture, oxygen, chlorides and other corrosivcell namelements, and helping to prevent stress corrosion cracking
  • Dries to a smooth, paintable surface
  • Easy to apply, with no mesh required

Available Forms

CalCoat-127 is packaged in a moisture resistant, heavy-duty poly bag, with a convenient built-in handle, containing 45 lbs. (20.4 kgs.).

Specification Compliance

ASTM C 449
BS 3958:Part 6
Certification of Compliance available upon request

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