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Simply the best insulation available on the market.


Demilec Heatlok XT-s


For a superior thermal insulation value, HeatlokXT-s won’t be beaten. This product will not only keep your family warm through the coldest winter, with this product we can create an excellent air and moisture seal, giving you full control of the interior environment for the life time of your home.


Performance Benefits


  • Stable thermal performance
  • R-value = 4.4 at 100mm
  • Good sound control
  • Maintains an air seal even after seasonal expansion / contraction of building assembly
  • Less than 1% water absorption
  • Supports indoor air quality by blocking air infiltration and mass transfer of  moisture that may cause mould.




  • Closed cell semi rigid structure
  • Medium density 2 lb
  • Expands ~30 times from liquid state
  • Application thickness is not limited
  • Will not harm coatings on electrical wiring,  plumbing or other building components
  • Low global warming potential.
  • 21% recycled material and uses soy plant base for the oil content.

















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