Dap Inc 42 Subfloor Polyurethane Adhesive Gel 20 Oz

Product Description

The DAP INC 42 is a 20 oz contractor-grade polyurethane subfloor adhesive in foaming gel form, designed for bonding subfloor panels to joists and sleepers in both interior and exterior applications. It applies as an expanding foam and cures into a high-strength gel, delivering strong adhesion along with gap-bridging capability. The 20-minute open time gives installers adequate working time to position panels before the adhesive sets. DAP rates this product at 8 times the coverage of standard cartridge adhesives, making it a practical choice for larger flooring jobs where material efficiency matters.

This adhesive is suited for residential and light commercial subfloor installation work. It bonds to wet, dry, frozen, and treated lumber, which makes it usable in conditions where moisture or job-site timing would limit conventional adhesives. Typical applications include wood subfloor panels over wood framing, sleepers, and similar structural members. It requires the Smartbond Construction Adhesive Applicator Gun Model 48 for dispensing and is not compatible with standard cartridge-style caulk guns.

Key Features

• Applies as a foam and transforms into a high-strength fast-curing polyurethane gel
• Bonds to wet, dry, frozen, and treated lumber
• Provides approximately 8 times the coverage of standard cartridge adhesives
• 20-minute open time for panel positioning and adjustment
• Suitable for both interior and exterior subfloor applications
• Requires Smartbond Construction Adhesive Applicator Gun Model 48

Compatibility

Designed for use with the Smartbond Construction Adhesive Applicator Gun Model 48. Bonds to wet, dry, frozen, and treated lumber substrates for subfloor panel installation in interior and exterior conditions.

Installation Notes

Installation is typically performed by flooring contractors or general carpenters familiar with subfloor systems. Ensure the applicator gun is loaded and primed according to the gun manufacturer instructions before dispensing. Work within the 20-minute open time to set panels before adhesive begins to cure. Follow applicable building codes and adhesive manufacturer guidance for subfloor fastener spacing used in conjunction with adhesive application.