3M™ Scotch-Weld™ DP810 Acrylic Structural Adhesive

3M Scotch-Weld DP810 acrylic adhesive: high-performance two-component adhesive

The 3M Scotch-Weld DP810 is a two-component acrylic adhesive designed for demanding structural assemblies. It bonds quickly, holds strong, and resists both shocks and vibrations.

Its main advantage: excellent adhesion on metals, plastics, and composites, without complex surface preparation.

Ideal for industrial environments where mechanical strength and bonding reliability are non-negotiable.

Overview of 3M Scotch-Weld DP810 acrylic adhesive

The 3M Scotch-Weld DP810 is a two-component acrylic adhesive designed for demanding industrial assemblies. It offers high mechanical strength on a wide range of substrates.

Its 1:1 mix ratio simplifies application. With a suitable dispensing gun and mixing nozzle, dosing is precise and repeatable.

The working time is approximately 4 minutes at 23 °C, allowing enough time to position parts before setting. Handling strength is reached in less than 20 minutes.

Composition and two-component technology

The DP810 is based on reactive acrylic technology. The two components, resin and hardener, remain stable separately, then react upon contact to form a solid bond.

This chemistry ensures excellent adhesion without complex surface preparation. It effectively bonds metals, plastics, composites, and mixed materials.

Unlike conventional epoxies, acrylic offers better resistance to shocks and vibrations. This is a decisive advantage in applications subject to dynamic stresses.

At Dagobert Industrie, we offer the DP810 for professionals seeking reliability and repeatability in their bonding processes.

Technical properties and mechanical performance

The 3M Scotch-Weld DP810 is a two-component acrylic adhesive with a 1:1 mix. It cures at room temperature without heat, simplifying its use in workshops or on-site.

Its working time is approximately 5 minutes after mixing. Handling strength is reached in 15 to 20 minutes. Full mechanical strength is achieved after 24 hours.

Tensile and shear performance are high. The tensile shear strength exceeds 20 MPa on steel, making it a true structural adhesive.

The DP810 withstands service temperatures between -40 °C and +120 °C. It retains its mechanical properties in humid environments and resists common oils and solvents well.

It adheres without complex preparation on a wide range of substrates: metals, engineering plastics, composites, and wood. Degreasing is sufficient in most cases.

Product	Type	Mix ratio	Working time	Shear strength	Max. temperature
3M Scotch-Weld DP810	Two-component acrylic	1:1	~5 min	> 20 MPa	+120 °C
3M Scotch-Weld DP8005	Two-component acrylic	4:1	~4 min	~14 MPa	+80 °C
Loctite EA 9430	Two-component epoxy	2:1	~30 min	~25 MPa	+130 °C
Sika SikaPower-498	Two-component epoxy	2:1	~45 min	~22 MPa	+120 °C

Compared to a conventional epoxy, the DP810 offers a much faster cure and better shock resistance. Epoxy remains superior for very high-temperature applications or those requiring extreme chemical resistance.

Compatible materials and application areas

The 3M Scotch-Weld DP810 acrylic adhesive effectively bonds a wide range of materials, often without primer. This is one of its major assets compared to conventional epoxies.

It adheres particularly well to hard-to-bond plastics: ABS, polycarbonate, PVC, acrylic, polyester, and composites. It is also suitable for metals (steel, aluminum, stainless steel) and mixed materials.

Here are the compatible material families:

• Engineering plastics: ABS, PC, PMMA, rigid PVC, polyester
• Metals: steel, aluminum, stainless steel, brass
• Composites and laminates: fiberglass, SMC, BMC
• Wood, MDF, porous materials in mixed assemblies

In terms of applications, the DP810 is used in the automotive industry, electronics, recreational vehicle construction, and signage manufacturing. Anywhere that shock and vibration resistance is critical.

Surface preparation before bonding

Good preparation remains essential, even if the DP810 tolerates imperfect surfaces better than a standard epoxy.

The essential steps:

• Degrease with a suitable solvent (isopropanol, acetone depending on the substrate)
• Lightly abrade smooth surfaces to improve mechanical anchoring
• Remove dust and abrasion residues before application
• On polyolefins (PP, PE): a 3M Scotch-Weld AC79 primer is still recommended

A clean and dry assembly ensures maximum shear strength performance, advertised up to 17 MPa on steel.

Comparison: 3M Scotch-Weld DP810 versus other two-component acrylic adhesives

The two-component acrylic adhesive market is dense. Here is how the DP810 positions itself against common alternatives.

Product	Manufacturer	Mix ratio	Working time	Shear strength	Strengths
Scotch-Weld DP810	3M	1:1	~4 min	~17 MPa	Excellent shock resistance, good weatherability, multi-material bonding
Scotch-Weld DP8005	3M	4:1	~5 min	~10 MPa	Specialized for polyolefins (PP, PE) without primer
Scotch-Weld DP820	3M	1:1	~18 min	~20 MPa	Longer working time, higher mechanical strength
Araldite 2021	Huntsman	1:1	~25 min	~16 MPa	Good flexibility, compatible with metals and plastics
Loctite AA 330	Henkel	-	~5 min	~15 MPa	Structural acrylic, requires an activator

The DP810 stands out for its very balanced working time/mechanical strength ratio. It offers a quick set without sacrificing the strength of the bond.

Compared to Araldite 2021 or Loctite AA 330, it has a concrete advantage: no activator required, which simplifies the workshop process.

Compared to the DP820 (same 3M range), the DP810 is better suited for sustained production rates: the short working time (~4 min) accelerates production cycles.

The DP8005 remains the dedicated choice for untreated polyolefins. For any other substrate, metal, composite, ABS, steel, the DP810 is more versatile.

Instructions for use and safety precautions

The 3M Scotch-Weld DP810 acrylic adhesive is a two-component adhesive: the two components (resin and hardener) must be mixed via the applicator gun and the provided mixing nozzle. Never mix manually.

Before application, carefully prepare the surfaces: they must be clean, dry, and degreased. Light sanding improves adhesion on smooth or painted surfaces.

Respect the working time indicated by 3M. Once the mixing nozzle is primed, the adhesive starts to polymerize rapidly. Change the nozzle at each new work session.

Full mechanical strength is achieved after total polymerization. Keep the assembled parts in position until the initial set, without mechanical stress.

Safety precautions to observe:

• Work in a ventilated area: acrylic vapors are irritating
• Wear nitrile gloves and safety glasses
• Avoid all contact with skin and eyes
• Store the product away from heat and out of the reach of children
• Consult the 3M Safety Data Sheet (SDS) before any industrial use

In case of skin contact, wash immediately with soap and water. In case of eye contact, rinse thoroughly and consult a doctor.

FAQ - 3M Scotch-Weld DP810

1. On which materials is the DP810 effective?

The 3M Scotch-Weld DP810 adheres to a wide range of substrates: metals, plastics (ABS, polycarbonate, PVC), composites, and porous materials like wood or ceramic.

It is particularly suitable for multi-material assemblies, where finding a universal adhesive is often complicated.

2. What is the working time after mixing?

The DP810 offers a working time of approximately 3 to 4 minutes after mixing the two components. This is sufficient to precisely position parts before setting.

Handling strength is reached in 20 to 30 minutes at room temperature.

3. Should surfaces be prepared before bonding?

Yes. A thorough degreasing with a suitable solvent (isopropanol, acetone) is essential to ensure maximum bond strength.

On low-surface-energy plastics like polyethylene or polypropylene, a bonding primer is recommended.

4. Does the DP810 resist shocks and vibrations?

This is one of the strengths of this acrylic adhesive. The cured bond remains flexible and absorbent, giving it excellent resistance to impacts and repeated vibrations.

It outperforms conventional rigid epoxies in this regard, which tend to crack under dynamic stress.

5. Can it be used outdoors or in humid environments?

Yes. The DP810 exhibits good resistance to humidity and weather once polymerized. It also withstands moderate exposure to oils and fuels.

For very aggressive environments (permanent immersion, intense UV), it is best to consult 3M technical data or contact us at Dagobert Industrie to validate the product choice.

6. What is the difference between the 3M DP810 and DP820?

The DP810 is formulated for a balance between flexibility and mechanical strength, with a short working time. The DP820 offers higher shear strength on metals but with less flexibility.

The choice depends on your application: prioritize the DP810 for assemblies subject to dynamic stresses, and the DP820 for rigid structures with high static loads.