Heavy-duty gap filler

Heavy-duty gap filler

Heavy-duty gaps require heavy-duty seals. Froth-Pak™ Spray Foam Sealant is a two-component, polyurethane foam that fills penetrations and cracks with significantly reduced curing time.

This heavy-duty, two-component foam seals out moisture, dust, allergens, and pests while improving energy efficiency, and our newly reformulated product delivers a GWP reduction of over 99%. The new Froth-Pak™ Spray Foam Sealant contains no ozone-depleting chemicals or HFCs while elevating the performance attributes you have come to expect.


  • Complete and portable two-component, quick-cure polyurethane foam kit that fills cavities, penetrations, cracks, and expansion joints.
  • Anti-crossover nozzle and the ergonomic dispensing system helps ensure consistent flow rate, on-ratio application, and complete dispensing of product.
  • Reusable for 30 days
  • Contains no ozone-depleting chemicals or HFCs.
  • Blocks air infiltration and helps to meet air change per hour (ACH) code requirements and reduces building energy costs.
  • Reduces the potential for moisture, mold, mildew, allergens, and rot.
  • One-hour occupant re-entry with proper ventilation after dispensing.
  • Quick 30-second cure time.
  • Uses include roof and wall junctures, wall and attic, crawlspaces and basements, electrical, mechanical, and plumbing penetrations in the building envelope.
  • Bonds to wood, rigid foam, masonry, metal, drywall, and more.
  • Formulation and dispensing systems are patent-pending.
  • GreenCircle® Certified; LEED V4 Compliant; ICC listed.
  • Comes in a variety of sizes to suit your needs.

Contact Lentus to order Froth-Pak™ Spray Foam Sealant by calling 270-765-2212 or emailing orders@LentusLLC.com.

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