1620 Ultra CBF Insulation

rFoil 1620 reflective insulation

1620 Ultra CBF Insulation

Extra tough for over slabs and under flooring. Provides exceptional thermal value and a strong, permanent vapor and radon barrier. The industry’s best choice for concrete applications at 140 PSI compression strength.


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140 PSI

Compression Strength

14.2 mil

Bubble Core Thickness

6x Stronger

than Rigid Foam

Methane, Radon & Vapor Barrier

rFoil 1620 reflective insulation
rFoil 1620 reflective insulation
rFoil 1620 reflective insulation
rFoil 1620 reflective insulation
rFoil 1620 reflective insulation

Product Overview

rFOIL 1620 Ultra CBF is a patented under-slab insulation that delivers an exceptional thermal break and a permanent vapor, radon, and methane barrier. Offering nearly six times the compression strength of rigid PE board, it withstands heavy jobsite traffic without crushing or cracking. Ultra CBF typically costs less than two-inch rigid foam, providing builders with a budget-friendly alternative that effortlessly conforms to uneven grades and plumbing obstructions.

Materials

A highly reflective metalized foil sheet sandwiched between two layers of industrial-strength polyethylene bubbles.

  • 48″ × 125′ (Available in square edge)
  • 16″ × 125′ (Available in square edge)
  • Custom sizes available
  • Choose rFOIL 1620 over 4320 (70 psi) or 4620 (90 psi) when you need maximum compression strength and durability.
  • Sealing seams with rFOIL® White Poly Tape ensures a uniform, high-performance insulator and vapor barrier.
  • The 1620’s protective laminate covers the reflective layer to prevent degradation from lime and corrosive soil alkalinity.

10-year limited warranty. See Warranty sheet below for details.

  • RIMA-I Verified
  • US Patent No.: 6,562,439, B2
  • US Patent No.: 6,514,596, B1

A highly reflective metalized foil sheet sandwiched between two layers of industrial-strength polyethylene bubbles.

10-year limited warranty. See Warranty sheet below for details.

Product Benefits


Superior 140 PSI compression strength prevents crushing

Permanent methane, radon, and vapor barrier

Puncture resistant up to 85 psi

Warmer floors and faster slab response times

Withstands heavy, continuous jobsite construction traffic

Cost-effective alternative to rigid foam boards

Protects metalized barrier from corrosive concrete chemicals

Easily conforms to uneven grade and obstructions

Flexible design ideal for edge-slab insulation

Applications

Specifications & Literature