Thermo-Sorb Series
Thermo-Sorb VOC & Thermo-Sorb 263

Carboline’s Thermo-Sorb line of Intumescent Fire Resistive Materials are interior, low VOC, solvent based thin film intumescent developed to meet VOC and LEED requirements. They can be applied in semi exposed, high humidity environments and are less sensitive to inclement weather & lower temperatures. These offer UL/ULC listed designs for many types of steel sections with fire ratings for interior general purpose and interior conditioned space applications.

Performance dashboard

Features & functionality

  • UL/ULC listed – designs for many types of steel sections. Fire ratings for both interior general purpose and interior conditioned space applications
  • Ratings up to 4 hours with Thermo-Sorb 263
  • Resistant to weather and semi-exposed conditions during construction
  • Low temperature application
  • Fast recoat and topcoat times


Visit Carboline for more product information

Thermo-Sorb VOC
Thermo-Sorb 263

Environment & materials

Improved by:

  • Declare, Red List Free
  • Thermo-Sorb 263 - Low VOC formulation (149 g/L); meets LEED fireproofing requirement of 150g/L


Certifications & rating systems:

  • Environmental Product Declaration (EPD)
  • ASTM E84 - Class A
  • SCAQMD Rule 1113 Compliant
  • Tested to meet (CDPH) Standard Method v1.2

Thermo-Sorb Series Guide Specs
For spec help, contact us or call 281.414.9710