Dual-Mix™ Seam sealer is a medium viscosity, two-component, epoxy sealer for sealing interior or exterior seams, joints and voids. Dual-Mix™ 39377 is a 2‑component liquid seam sealer supplied in a 7 oz cartridge, formulated for rapid repair of seams on automotive panels. It is designed for use on a wide range of substrates including aluminum, steel, bare metal, e‑coat, fiberglass, OEM plastics, primer, and SMC, making it suitable for most body‑shop applications. The system provides a 60‑minute work time and reaches sandable condition in 15 minutes, allowing efficient feather‑feathering before final cure. Full cure is achieved in 48 hours at 70 °F, and the formulation is zero‑VOC, reducing environmental impact and compliance concerns. Coverage is optimized for dark‑gray finish matching typical panel colors. Due to its acute toxicity, skin corrosion, eye damage, and respiratory hazards, appropriate personal protective equipment is required: chemical‑resistant gloves, eye protection, protective clothing, and a respirator in well‑ventilated areas. Follow H302, H315, H317, H319, H335, and H351 safety statements during handling. Why Pros Choose SEM 2-Component Dual-Mix™ forever warranty OEM recommended Direct to metal Paintable immediately Will not shrink, harden or crack Non-sag formula duplicates OEM sealers Fast cure increases production Sprayable for additional versatility Excellent adhesion to bare metal or primed surfaces How to Use For use on bare metal, OEM finish, epoxy primer and DTM urethane primer Clean the substrate thoroughly; remove all contaminants, loose material, and ensure the surface is dry. Mix the two components of Dual‑Mix™ 39377 according to the manufacturer’s instructions, blending until a uniform consistency is achieved. Apply the seam sealer to the prepared joint. Work within the 60‑minute work window; the material remains sandable after approximately 15 minutes. After the sandable time, sand the cured seam as needed, then allow the repair to fully cure for 48 hours before final finishing. Compatibility Compatible substrates: Bare Metal, Primed Surface. Compatible paint systems: Epoxy. Specifications Technical specifications for Dual-Mix™ 39377 2-Component Seam Sealer, 7 oz Cartridge, Liquid, Dark Gray, 10 min at 70 deg F Application Part No. 39377 Product Line SEM MFR Model 39377 Standard/Approvals GHS07 | GHS08 | OSHA HCS Hazard | OEM Approved | California PROP65 Warning: Cancer and Reproductive Harm Application For use on bare metal, OEM finish, epoxy primer and DTM urethane primer Manufacturer SEM UPC 646786393778 Brand Dual-Mix™ Maximum Sale Quantity 6 Maximum Sale Day 7 Applicable Materials Bare Metal, Epoxy Primer, DTM Urethane Primer Composition 30 to 40% Bisphenola(chloro)oxirane Polymer, 5 to 7% Fumed Silica, 1.5 to 5% Epoxy Resin, 1.5 to 5% Modified Diglycidal Ether, >=1.5 to =0.1 to =0.1 to
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