3M™ Scotch-Weld™ DP100 Two-Part Structural Epoxy Adhesive

3M™ Scotch-Weld™ DP100 Two-Part Structural Epoxy Adhesive: Features and Applications

3M™ Scotch-Weld™ DP100 is a two-part epoxy adhesive designed for demanding structural assemblies. It provides durable bonding for metals, composites, plastics, and porous materials.

Its clear-when-cured formula makes it ideal for applications where aesthetics matter. Mixing is handled directly via an applicator gun, requiring no complex preparation.

A reliable choice for professionals who need a high-performance mechanical bond without the need for welding or mechanical fasteners.

Overview of the 3M™ Scotch-Weld™ DP100 Two-Part Structural Epoxy Adhesive

Composition and two-part epoxy technology

3M™ Scotch-Weld™ DP100 is a two-part structural epoxy adhesive formulated for high-performance assemblies. It consists of an epoxy resin and a hardener, which are mixed at the moment of application through a static mixing nozzle.

This two-part system ensures a controlled chemical reaction with every use. No manual measuring: the ratio is fixed by the dual-cartridge design.

Once cured, the adhesive forms a rigid, transparent joint that is resistant to high mechanical loads. It is suitable for materials that are difficult to join via screws or welding.

DP100 adheres to a wide range of substrates:

• Metals (steel, aluminum, brass)
• Rigid plastics (ABS, PVC, polycarbonate)
• Composites and laminates
• Glass and ceramic

Its working time of approximately 4 minutes allows enough time to position parts before setting begins. Full mechanical strength is reached after curing at room temperature.

At Dagobert Industrie, we offer this product for industrial, maintenance, and structural repair applications requiring reliability and long-term durability.

Technical properties and mechanical performance of DP100

3M Scotch-Weld DP100 is a clear, two-part epoxy adhesive based on resin and hardener. It cures at room temperature without the need for heat.

Its mixing ratio is 1:1 by volume. The cartridge fits directly onto a dispensing gun with a static mixing nozzle, ensuring precise dosing with every application.

The working time (pot life) is approximately 4 minutes at 23 °C. The bond can be handled after 20 to 30 minutes, and final strength is reached in 24 hours.

DP100 develops a shear strength of approximately 15 to 20 MPa on steel, depending on surface conditions. This is sufficient for light structural assemblies and industrial fastening applications.

It adheres to a wide range of substrates: metals, rigid plastics, composites, wood, and ceramics. Once cured, it is resistant to common solvents and light oils.

Product	Base	Mix Ratio	Pot life (~23°C)	Shear Strength	Typical Usage
3M DP100	Epoxy	1:1	~4 min	~15-20 MPa	Light assembly, fast fixing
3M DP190	Epoxy	2:1	~80 min	~25 MPa	Structural assembly, long working time
3M DP460	Epoxy	2:1	~60 min	~30 MPa	High strength, metals and composites
Loctite EA 9461	Epoxy	1:1	~30 min	~20 MPa	General industrial assembly

DP100 stands out among two-part epoxies for its ultra-fast curing. It is suitable for applications where production speed takes priority over maximum strength.

Application fields and compatible materials

3M™ Scotch-Weld™ DP100 is a structural epoxy adhesive designed to bond rigid materials in demanding industrial and technical environments.

It is suitable for both permanent assemblies and structural repairs requiring high mechanical strength.

Which substrates can be bonded with Scotch-Weld™ DP100?

DP100 adheres to a wide range of materials, making it a versatile reference in both workshops and on job sites.

Compatible substrates:

• Metals: steel, aluminum, stainless steel, brass, copper
• Rigid plastics: ABS, PVC, polycarbonate, polyester
• Composites and laminates: fiberglass, carbon fiber
• Ceramic and glass
• Hardwood and MDF

It is particularly well-suited for metal-to-metal and metal-to-composite assemblies subject to significant mechanical stress, such as vibrations, shocks, or traction.

In terms of applications, it is found in:

• Automotive and aerospace industries for bonding structural parts
• Electronics for component retention
• Construction and industrial woodworking
• Repair of mechanical parts as a substitute for screwing or welding

Note: On low surface energy plastics (polyethylene, polypropylene, PTFE), a primer is required before application.

Comparison: 3M™ Scotch-Weld™ DP100 vs. other structural epoxy adhesives on the market

3M™ Scotch-Weld™ DP100 is a transparent, 1:1 ratio, two-part epoxy with a working time of approximately 4 minutes. It is distinguished by its high shear strength and its ability to bond dissimilar materials.

Compared to other common structural epoxy adhesives, here is how it ranks:

Product	Manufacturer	Mix Ratio	Working Time	Shear Strength (Steel)	Strengths
Scotch-Weld™ DP100	3M	1:1	~4 min	~20 MPa	Transparent, versatile, dissimilar materials
Scotch-Weld™ DP190	3M	1:1	~20 min	~17 MPa	Flexible, resistant to shocks and vibrations
Araldite® 2011	Huntsman	1:1	~100 min	~18 MPa	Long working time, good chemical resistance
Loctite® EA 9461	Henkel	2:1	~60 min	~25 MPa	High mechanical strength, intensive industrial use

DP100 stands out for its speed: a 4-minute working time is ideal for serial assemblies or quick on-line repairs.

Its 1:1 ratio simplifies dosing. No precision scales are needed, the 3M applicator gun ensures a homogeneous mix with every application.

While products like Araldite® 2011 are better suited for complex assemblies requiring long repositioning times, DP100 prioritizes operational efficiency on a daily basis.

For applications subject to high vibration or shock, Scotch-Weld™ DP190 (which is more flexible) is better suited. DP100 remains the benchmark choice for rigid assemblies on metals, plastics, and composites.

Implementation tips and safety precautions

Surface preparation and mixture dosing

Proper surface preparation is the #1 condition for a successful bond. Degrease surfaces thoroughly with a suitable solvent (acetone, isopropanol) before any application.

On metals, light sanding or sandblasting significantly improves adhesion. Then, remove any trace of dust or residual oil.

DP100 is applied using a dual-cartridge gun and a static mixing nozzle. This system ensures a perfectly respected resin/hardener mixing ratio (1:1 by volume) without manual intervention.

• Purge the first few seconds of extrusion before bonding
• Never reuse a hardened mixing nozzle
• Apply uniform pressure to parts during curing
• Observe the open time (~4 min at 23 °C) to position parts
• Wait for full strength at 24 hours before applying mechanical load

Working temperature directly influences kinetics. Below 15 °C, curing slows significantly. Moderate heating (40-60 °C) can accelerate the setting process without degrading the final properties.

Wear nitrile gloves and safety glasses during handling. Uncured epoxy resin is irritating to the skin and eyes. Work in a ventilated area.

FAQ - 3M™ Scotch-Weld™ DP100 Two-Part Structural Epoxy Adhesive

1. What is the difference between DP100 and other 3M two-part epoxy adhesives?

3M Scotch-Weld DP100 is a transparent, fast-curing epoxy (approx. 5 minutes of working time). It differs from DP190 (flexible, gray, ideal for flexible joints) or DP460 (high mechanical strength, longer working time). DP100 is designed for fast assemblies on small surfaces.

2. On what materials can DP100 be used?

It effectively bonds metals, glass, ceramic, wood, and most rigid plastics (ABS, PVC, polycarbonate). It adheres less well to oily surfaces or low-surface-energy plastics like polyethylene or polypropylene without pre-treatment.

3. Do surfaces need to be prepared before bonding?

Yes, always. Surfaces must be clean, dry, and degreased. Light sanding improves adhesion, especially on smooth metals. It is a simple step, but one that makes all the difference in the final strength of the joint.

4. What mechanical strength can be expected from DP100?

DP100 offers a shear strength of approximately 15 to 20 MPa on steel, depending on preparation conditions. This is sufficient for light to moderate structural assemblies. For more demanding loads, one should turn to a high-performance epoxy like DP460 or DP490.

5. Can DP100 be used outdoors?

Once cured, DP100 provides decent resistance to humidity. It withstands temperatures between approximately -40 °C and +80 °C. For prolonged exposure to UV or harsh weather, additional protection for the joint is recommended.

6. How is DP100 applied with a 3M dispensing gun?

The DP100 cartridge is used with the 3M EPX applicator gun and a static mixing nozzle. Both components are dosed and mixed automatically upon exit. Purge a few centimeters before application to ensure a homogeneous mixture from the start.