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Bonding and Assembly

3M™ Scotch-Weld™ Structural Adhesives

Worker applies 3M™ Scotch-Weld™ Epoxy Adhesive DP420 before inserting another part in the cylinder joint
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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.

  • Image of a small portion of the chemistry makeup of Acrylic based on benefits
    Acrylic Adhesives

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

  • Image of a small portion of the chemistry makeup of Epoxy based on benefits
    Epoxy Adhesives

    These adhesives provide excellent durability and resistance to environmental extremes.

    One-Part Epoxy

    Two-Part Epoxy

  • Image of a small portion of the chemistry makeup of PUR based on benefits
    PUR Adhesives

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

  • Image of a small portion of the chemistry makeup of Urethane based on benefits
    Urethane Adhesives

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

  • Image of a small portion of the chemistry makeup of Anaerobic based on benefits
    Anaerobic Adhesives

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

  • Image of a small portion of the chemistry makeup of Instant Adhesives based on benefits
    Instant Adhesives

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

Core Benefits of Structural Adhesives

  • Icons of the Nine Core Benefits of 3M 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

Lightweighting

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

Aesthetics

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

NVH

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

Strength

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)

  • Still shot from a video discussing how temperature affects the cure profile of an adhesive
    Structural Adhesives FAQs

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

    GO TO FAQS
  • Still shot from Shari Loushin’s Meet the Experts video
    Meet the Experts

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

    MEET THE EXPERTS

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.

EXPLORE PRODUCTS

Structural Adhesives Key Markets

  • Appliances
    Appliances
      • Simplify operations by bonding after powdercoating
      • Eliminate the challenge of bonding rigid to flexible substrates
      • Noise damping
      • Reduce complexity-bond and seal glass to metal in one step

      Key Chemistries:
      Epoxy, Acrylic, PUR

    • Image of kitchen appliance

  • Aerospace
    Aerospace
      • Available in UL94 or FST compliant options
      • Strong, yet flexible bond lines

      Key Chemistries:
      Epoxy, Urethane

    • Image of plane in-flight

  • Electronics
    Electronics
      • Low halogen formulations available to meet customer needs
      • Fast cure to speed production
      • Durable adhesive bonds protect sensitive electrical connections from the environment.

      Key Chemistries:
      Epoxy, Acrylic, PUR

    • Person looking at phone

  • HVAC
    HVAC
      • Floor panel and drain pan to frame
      • Side wall panel attachment to frame
      • Stiffener to panel

      Key Chemistries:
      Acrylic

    • Image of HVAC attached to a wall

  • Metalworking
    Metalworking
      • High strength and durability
      • Reduced surfac preparation before bonding, and no grinding after bonding
      • Save weight and improve appearance with adhesives instead of welds or rivets

      Key Chemistries:
      Acrylic, Epoxy, Anaerobic

    • Image of metal bonding

  • Plastic, Composite & Rubber
    Plastic, Composite & Rubber
      • Bonding of low surface energy plastics without priming
      • Impact resistant composite bonding

      Key Chemistries:
      Acrylic, Urethane, Instant

    • Image of front-end of vans

  • Signage
    Signage
      • One adhesive to bond all of your substrates
      • Strong formulations and thin bond lines
      • Weather resistance
      • UL recognition

      Key Chemistries:
      Acrylic

    • 3M Global Headquarters sign

  • Specialty Vehicle
    Specialty Vehicle
      • Weight reduction
      • High strength
      • Vibration & fatigue resistance

      Key Chemistries:
      Urethane, Acrylic

    • Semi-truck driving down road

  • Sporting Goods
    Sporting Goods
      • Excellent impact resistance of high stressed bonds
      • High strength for small joints
      • High strength bonding of rubber, composites and metals to each other

      Key Chemistries:
      Epoxy, Acrylic

    • Golf club striking golf ball

  • Transportation
    Transportation
      • Metal skin to metal frame
      • Composite cab assembly
      • Frame assembly
      • Floor panel bonding
      • Exterior panel bonding
      • Roof bonding

      Key Chemistries:
      Acrylic

    • White car parked outside

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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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