Esp EF12 Polyurethane Foam Sealant 12 Oz

Product Description

The ESP EF12 is a polyurethane expanding foam sealant packaged in a 12 oz can, designed for multi-purpose filling of holes, joints, and cracks in residential and light commercial construction and mechanical systems. Once dispensed, the foam expands to fill irregular voids and cures within 24 hours to a rigid, closed-cell mass that blocks air infiltration, moisture intrusion, and pest entry. HVAC technicians, plumbers, and electricians reach for this product when sealing penetrations through walls, floors, and ceilings as part of code-compliant air-sealing and firestopping workflows.

The EF12 is suited for a wide range of trade applications including sealing pipe and conduit penetrations, filling gaps around ductwork, closing voids in framing cavities, and weatherproofing around window and door rough openings. Its one-component, moisture-cure formula requires no mixing and works on most common substrates including wood, masonry, metal, and rigid foam insulation board. The compact 12 oz can size is well suited for service calls and smaller patching jobs where a full two-part kit is unnecessary.

Key Features

• Polyurethane foam expands to completely fill irregular holes, joints, and cracks
• 24-hour full cure time allows foam to be trimmed, sanded, or painted after set
• 12 oz can format is portable and practical for field service use
• Single-component formula requires no mixing or secondary catalyst
• Listed to UL applicable standard for use in qualifying applications

Compatibility

Designed as a general-purpose expanding foam sealant suitable for multi-trade penetration sealing in residential and commercial construction applications.

Installation Notes

Application is typically performed by HVAC technicians, plumbers, or electricians as part of penetration sealing during rough-in or service work. Shake the can thoroughly before use and apply in thin lifts, as the foam will expand significantly after dispensing. Allow the full 24-hour cure before trimming excess material with a utility knife. Consult applicable local mechanical and building codes regarding fire-rated penetration requirements, as this product may not be a rated firestop assembly on its own.

Technical Specifications

• Type: Polyurethane Foam
• Container Capacity: 12 oz
• Container Type: Can
• Setting Time: 24 hours
• Application: Multi-Purpose Filler for Holes, Joints, and Cracks
• Certification: UL

Standard Information

• Brand: ESP
• Manufacturer Part Number: EF12