This low-pressure polyurethane foam is designed for controlled air sealing in crawl spaces and basements, where precision matters more than aggressive expansion. With an R-value of 4.7 per inch and approximately 68% closed-cell structure, it provides a reliable thermal and air seal for rim joists, sill plates, penetrations, and rigid foam edges.

The foam becomes tack-free in about 5 minutes, can be cut within an hour, and fully cures in 12–24 hours, making it ideal for detail work during encapsulation or retrofit projects. Its low-density formulation allows it to expand gently, helping prevent bowing or displacement of framing and insulation materials.

Rated for fire performance under ASTM E84 / UL 723, this foam meets GREENGUARD Gold standards for low chemical emissions and complies with AAMA 812 specifications for low-pressure sealants. It’s a practical alternative to closed-cell spray foam when sealing smaller areas without overspray or specialized equipment.

Key Performance Specs (at a glance):

• R-Value: 4.7 @ 1"

• Density:
  • Straw: 1.0 lb./ft³
  • Gun: 1.10 lb./ft³

• Cell Structure: ~68% closed cell

• Tack-Free: ~5 minutes

• Cuttable: < 1 hour

• Fully Cured: 12–24 hours

• Fire Rating:
  • Flame Spread: 25
  • Smoke Developed: 50

• Certifications: GREENGUARD Gold, AAMA 812 compliant

• Shelf Life: 15 months

Best used for:
Rim joists • sill plates • pipe & wire penetrations • rigid foam seams • crawl space detail sealing