Dual-Mix™ sound and seal sprayable coating is a sprayable, epoxy and urethane blend for replacing OEM coatings under rocker panels, in trunks, and on floor sections and frame rails. Dual-Mix™ 40977 Sound and Seal Sprayable Coating is a 7 oz dark gray liquid formulated for rapid sound dampening and sealing of automotive panels. It is applied by spray to eliminate wind noise, vibration, and minor surface imperfections on bare metal, OEM finishes, or primed substrates. The coating offers a work time of 10 minutes at 70 °F (21 °C) and reaches full cure in 1 hour under the same conditions, allowing fast turnaround in high-volume shops. Its low flash point of 111 °C provides stable handling while delivering consistent film thickness for reliable acoustic performance. Due to its acute toxicity and skin corrosivity, use requires eye protection, chemical-resistant gloves, protective clothing, and a respirator with adequate ventilation. Follow H302, H315, H317, H319, H335, and H351 safety statements and consult the SDS for first-aid procedures. Why Pros Choose SEM SEM Dual-Mix™ forever warranty OEM recommended Will not shrink, harden or crack Retains flexibility Excellent adhesion to properly prepped surfaces Paintable in 30 min Application Guide Clean the substrate thoroughly; remove rust, oil, grease, and any loose material. Ensure the surface is dry and at approximately 70 °F (21 °C). No mixing required - the Dual-Mix™ 40977 coating is supplied ready-to-spray. Using a spray gun, apply the first coat evenly within the 10-minute work window. Maintain proper atomization for uniform coverage. If additional coverage is needed, apply a second coat after the first has dried (approximately 10-15 minutes). Keep each pass within the 10-minute work time. Allow the final coat to cure for 1 hour at 70 °F (21 °C) before handling or applying topcoats. Compatibility Compatible paint systems: Urethane, Epoxy. Specifications Technical specifications for Dual-Mix™ 40977 Sound and Seal Sprayable Coating, 7 oz Cartridge, Dark Gray, Liquid, 1 hr Curing Part No. 40977 Product Line SEM MFR Model 40977 Standard/Approvals California Pro65 Warning: Cancer | GHS and OSHA Hazard Manufacturer SEM UPC 646786409776 Brand Dual-Mix™ Maximum Sale Quantity 6 Maximum Sale Day 7 Applicable Materials Bare Metal Composition 13 to 30% Epoxy Resin Modifier, 13 to 30% Castor Oil Glycidal Ether,>=7 to =1.5 to =0.1 to
