3M™ Scotch-Weld™ Epoxy Adhesive 420NS is a non-sag, two-part epoxy formulated to be durable and tough. This epoxy adhesive absorbs impact, resists vibration and fatigue and provides high shear and peel strength. 3M™ Scotch-Weld™ Epoxy Adhesive 420NS is capable of providing durable and dependable adhesion for some of the most demanding applications.
Non-sag, two-part epoxy features controlled flow and application
Capable of absorbing impact and resisting vibration and fatigue, providing long-term durability
Withstands powdercoating processes
High shear and peel strength for durable and dependable adhesion
20-minute work life allows time for adjustment during application
Formulated for Tough Environments
3M™ Scotch-Weld™ Epoxy Adhesive 420NS is a toughened, two-part epoxy that offers excellent shear and peel strength. This non-sag epoxy provides controlled flow for optimal results during application. In addition, its elastomeric additives absorb impact and resist vibration and fatigue. These features make 3M™ Scotch-Weld™ Epoxy Adhesive 420NS an excellent choice for some of the most demanding end-use applications. With a 20-minute work life, 3M™ Scotch-Weld™ Epoxy Adhesive 420NS allows time for adjustment during application. It reaches handling strength in 2 hours. This product has a 2:1 mix ratio and bonds extremely well to many surfaces, such as metals, epoxy-based composites, ceramics, glass, wood and some plastics.
3M™ Scotch-Weld™ Epoxy Adhesive 420NS is used across many industries. Some of the recommended applications include:
Small joint assembly
Heavy-duty mounting assembly
Carbon fiber epoxy bonding
What are Epoxy Adhesives?
Epoxy adhesives are part of the class of adhesives called "structural adhesives," which also includes polyurethane, acrylic, cyanoacrylate and others. Epoxies are formulated as liquid reactive polymers that undergo a chemical reaction when mixed and then cure to form a solid plastic material. Once the two parts are mixed in their specified ratio, they begin the curing process and offer a limited working time where the adhesive can be applied and the two surfaces positioned as needed. This work life lasts anywhere from a few minutes to several hours. These structural adhesives provide high shear and peel strengths, depending on the formula, and better heat and chemical resistance than other common adhesives. In general, epoxy adhesives have the highest overall strength and offer the best performance and most resistance to high temperatures, solvents and outdoor weathering.
Epoxy adhesives are widely used in building and home construction; aircraft and automobile manufacturing; bicycle, boat, golf clubs, ski and snowboard assembly as well as a host of home use and other applications. They are used virtually anywhere high-strength bonds are needed along with resistance to environmental conditions. These adhesives are popular for their ease of use, mechanical strength and chemical resistance. Formulations can be created to make epoxies flexible or rigid, transparent or opaque, quick setting or slow setting. The versatility with which epoxy adhesives can be formulated helps meet almost any requirement for bonding wood, metal, glass, stone and various plastics.
Industrial uses for epoxies range widely and, in addition to adhesives, include coatings and composite materials like carbon fiber and glass-reinforced composites. They are the preferred choice due to their ability to flow and conform to the work area, strong adhesion, chemical and heat resistance and exceptional mechanical and electrical insulating properties.
3M™ Scotch-Weld™ Epoxy Adhesive 420NS is appropriate for applications that will face tough environmental challenges. Formulated to provide strong adhesion for the long-term, this resilient non-sag epoxy is another way 3M has applied our expertise to meet and exceed the demands of even the toughest applications.
Hard Disk Drive Component Assembly, Bonding
24 Hours @ 72 F (22 C)
75-80 Shore D
Transportation, Specialty Vehicle, Construction, Military & Government, General Industrial, Electronics, Consumer Goods