Demilec Heatlok XT High Yield Resin 480 lb Drum (Closed-Cell Spray Foam)

Regular price $3,068.39

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Heatlok XT High Yield closed-cell spray foam resin drum

Demilec Heatlok XT High Yield is a closed-cell spray foam resin designed to create a high-performance building envelope for residential and commercial construction. It delivers strong thermal resistance while also serving as an air barrier and recognized vapor retarder for interior or exterior applications.


Key Features:

  • High Thermal Performance: Aged thermal resistance of 6.9 at 1 inch for improved energy efficiency.
  • Envelope-Enhancing Air Seal: Creates a specialized building envelope and functions as an excellent air barrier.
  • Vapor & Moisture Control: Recognized vapor retarder (Class II at 1.1 in) and tested water-resistant barrier (WRB).
  • Code/Program Tested: NFPA 285 tested and ABAA evaluated for building enclosure use.
  • Flood-Resistance Capability: Meets Class 5 FEMA flood damage-resistance requirements.

Specifications Table:

Specification Details
Product name Demilec Heatlok XT High Yield Resin 480lb Drum
Brand DEMILEC USA LLC
SKU / Part number XT-PROWMDU
Category Spray Foam Insulation
Foam type Closed Cell Foam
Container type Drum
Container size/weight 480 lb drum
Aged thermal resistance 6.9 @ 1 inch
NFPA 285 Tested
Water-resistant barrier (WRB) Tested
Vapor retarder rating Class II vapor retarder at 1.1 in thickness
Flood damage resistance Meets Class 5 FEMA (Flood Damage Resistance Requirements)
ABAA evaluation ABAA Evaluated
Applications Commercial and residential construction; interior and exterior applications
Performance benefits Provides better thermal resistance, an excellent air barrier, and a recognized vapor retarder
Formula availability Available in multiple formulas for varying temperatures
Variant / item name (listing) Heatlok XT Winter

Frequently Asked Questions (FAQ):

Q: Is this open-cell or closed-cell spray foam?
A: It is a closed-cell foam system (Heatlok XT High Yield).


Q: What R-value does it provide?
A: The aged thermal resistance is listed as 6.9 at 1 inch.


Q: Can it be used as an air barrier and vapor retarder?
A: Yes—Heatlok XT is described as an excellent air barrier and a recognized vapor retarder; it is Class II at 1.1 in thickness.


Q: Is it suitable for interior and exterior use?
A: Yes, it is stated to be suitable for both interior and exterior applications.


Q: What container size/type is this item?
A: This product is supplied in a drum and the item is specified as a 480 lb drum.


Quiet confidence, sealed in: a smarter building envelope

Great design begins with what you don’t see—Heatlok XT High Yield turns the hidden cavity into a high-performance shell, smoothing out temperature swings and tightening the air seal for a calmer, more comfortable interior. Its closed-cell structure brings a disciplined, architectural precision—thermal resistance, air control, and vapor performance working in concert. Pair it with thoughtfully detailed wall assemblies and clean-lined finishes for a space that feels effortlessly refined. It’s the behind-the-walls upgrade that makes luxury living feel serene and intentional.


Choose Heatlok XT High Yield to tighten your envelope, boost thermal performance, and build with confidence for interior or exterior applications.

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Subject to Approval & Availability
All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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