3M™ Scotch-Weld™ Structural Adhesives

Worker applies 3M™ Scotch-Weld™ Epoxy Adhesive DP420 before inserting another part in the cylinder joint
We help you make it. Better.

Engineered for Strength, Design Innovation and Multi-Material Assembly. Our Structural Adhesives provide the strength you need while enabling lightweight, high-performance designs and new production realities.


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The Strong Complement to Welding, Rivets and Mechanical Fasteners

  • The better way to stronger production possibilities.

    When you need advanced strength and durability along with the improved aesthetics of smooth, invisible bond lines, look to 3M™ Scotch-Weld™ Structural Adhesives. From kitchen appliances and sporting goods to automobiles and aerospace, our wide variety of structural adhesives includes options to meet your design and manufacturing needs. Whatever your design, engineering or production requirements, look to 3M for solutions.

    Our broad product portfolio encompasses different chemistries, curing methods, open times and final bond capabilities, including low-odor and non-flammable versions of certain chemistries to meet specific regulatory and safety requirements. We also have a world-class team of experts who can work with you to address specific design or process needs such as lightweighting or productivity and answer the question: How can you make your product better?

Structural Adhesive Chemistries

Each adhesive is unique, but adhesive families tend to share certain characteristics for which they perform well. These are the key characteristics described in the chemistry families below – click the hotspots for a general description, then explore each chemistry to learn more.

  • These two-part adhesives offer great strength and design flexibility.

  • These adhesives provide excellent durability and resistance to environmental extremes.

    One-Part Epoxy

    Two-Part Epoxy

  • These one-part products combine the speed of hot melt adhesives with the structural benefits of moisture-curing chemistries.

  • These formulations are ideal for creating strong, flexible bonds between dissimilar materials.

  • These products provide tight fits and seals in threadlocking, pipe sealing and related applications.

  • These products reach handling strength in 5-10 seconds and achieve extremely high tensile strengths.

Core Benefits of Structural Adhesives

Material Bonding

Structural adhesives bond dissimilar materials and also provide insulation to resist corrosion when bonding two different metals

Process Efficiency

Different chemistries provide a variety of surface preparation, open time and strength-build times so you can find the best options for your process

Impact Resistance

Depending on the chemistry, structural adhesive bonds provide the strength or flexibility to resist shock, vibration and impact loads


Adhering to new materials and distributing stress along the entire bond area helps designers use thinner and lighter materials

Innovation in Design

Adhering to new materials and distributing stress along the entire bond area helps designers use thinner and lighter materials


Structural adhesives provide better product appearance through invisible joints and smooth bond lines

Water Intrusion

Structural adhesives provide a continuous bond line to prevent the migration of fluids, dust and dirt


Different chemistries offer different advantages for reducing unwanted noise: stiff bonds can resist vibration while flexible bonds can absorb and disperse these energies


Each chemistry has advantages, but all structural adhesives offer the strength you need without the weight you don’t so you can reduce or eliminate mechanical fasteners

Image of shear test equipment behind title “Project IBIS: A Case for Structural Adhesives”

Project IBIS

Gathering Data to Help Engineers Make Decisions

Skepticism is part of the job description: engineers need to see the data, and even our own engineers can be skeptical about the ability of structural adhesives to replace welding or mechanical fasteners. So they designed a test to see for themselves.

This docu-series created by 3M demonstrates collaboration, testing and problem-solving for our modern world.

See the Shear Impact Test white paper (PDF, 689.81 KB)

  • We asked our Application Engineers to talk about some of the common questions they answer.

  • Get to know the engineers and other experts who make 3M a problem-solving powerhouse.

Testimonial Videos: Customers Discuss How 3M Structural Adhesives Helped Them

Worker applies 3M™ Scotch-Weld™ Low Odor Acrylic Adhesive DP8805NS before insertion into another part
Structural Adhesives Comparison Tool

Explore products by substrates, application method, open time and full cure time.


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Need help finding the right product for your project? Contact us if you need product, technical or application advice or want to collaborate with a 3M technical specialist, or give us a call at 1-800-831-0658.

Need help finding the right product for your project? Contact us if you need product, technical or application advice or want to collaborate with a 3M technical specialist, or give us a call at 1-800-831-0658.

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