Our 3M™ Hot Melt Adhesive 3779 is an amber color, high performance thermoplastic adhesive formulated for strong resistance to heat, impact, fuel, oil, and is effective for use in electronic applications such as potting and wire tacking.
Provides high heat resistance for a durable bond
Resilient adhesive is fuel, oil, and impact resistant
Multi-purpose adhesive works on a variety of substrates including some plastics
Open bond time allows for fit adjustment and positioning
Low odor helps maintain comfortable work environment
We manufacture this product using 100% solids, thermoplastic resin for use with our 3M Scotch-Weld™ Hot Melt Applicator PG TC Q and EC. Its 25 second open time, along a 1/8" bead, is sufficient for positioning and adjusting for fit and supports high-tempo productivity for assembling, joining, attaching, securing, repairing, panel bonding, bundling, sealing, encapsulating, rigidizing, foam bonding, gluing, packaging, adhering and closing. 3M Scotch-Weld Hot Melt Adhesive 3779 will also bond wood, polyolefins such as polyethylene and polypropylene, corrugated boxes, and lightweight substrates on furniture, upholstery and novelties and meets specifications for UL 94 Listing VO.
About Hot and Low Melt Adhesives
Hot melt adhesives/hot-glue sticks have a relatively hot melting point that ranges between approximately 250-380°F/121-196°C, depending on the formulation, and are applied with hot-melt applicators, commonly referred to as hot-glue guns. Hot-melt glues provide a nearly instant bond between many plastics, paper and wood, but when the bond is reheated, some varieties will soften, allowing the bonded surfaces to be separated. The quick-stick nature of hot-melt adhesives speeds up operations in packaging and production.
Low melt adhesives/ hot-glue sticks have a relatively low melting point that ranges between approximately 170 – 250°F/76 – 121°C, depending on the formulation, and are applied with low-temperature applicators, commonly referred to as hot-glue guns. Low-melt adhesives are beneficial in that they can be used to bond heat sensitive materials such as foam and a range of plastics. They provide a nearly instant bond but when the bond is reheated, some varieties will soften, allowing the bonded surfaces to be separated. The aggressive hot tack nature of low-melt adhesives speeds up production and assembly operations that involve light gage metals, some plastics, and other non-fibrous materials in addition to building display boards, floral displays, and hobby projects. These adhesives are also used in manufacturing, assembly and packaging processes, window, door, construction, transportation, electronics, and other industries, as well as in woodworking, assembling building store displays, convention sample boards, trophies, novelties, upholstery, furniture, audio components, and cabinets.
It is dispensed with bulk application equipment, It is dispensed with 3M™ Scotch-Weld™ Hot Melt Applicator TC Q and EC, It is dispensed with 3M™ Scotch-Weld™ Hot Melt Applicator TC, It is dispensed with 3M™ Scotch-Weld™ Hot Melt Applicator PG II
Bead Open Time
22 lb., 11 lb.
300 Degree Fahrenheit
Heat Resistance Range
Automotive, Construction, Furniture, Signage, Consumer Goods, Specialty Vehicle, Transportation, General Industrial, Military & Government, Retail, Electronics, Woodworking, Packaging