3M Scotch-Weld DP190 Clear Structural Epoxy Adhesive – 48.5 mL for Transparent Bonding

3M Scotch-Weld DP190 is a high-performance, optically clear two-component structural epoxy adhesive designed for applications where bond line visibility must be minimized. Its clear, transparent formulation makes it ideal for bonding glass panels, polycarbonate transparencies, clear plastic components, and composite assemblies where a colored adhesive would be aesthetically unacceptable or visually intrusive.

DP190 provides structural bond strength comparable to colored epoxy variants in the Scotch-Weld family, with the added advantage of optical transparency that makes the adhesive joint virtually invisible in completed assemblies. This combination of structural performance and optical clarity makes DP190 a preferred choice for aerospace transparency bonding, display assembly, optical component bonding, and precision instrument manufacturing.

The 48.5 mL dual cartridge format delivers pre-metered adhesive through a static mixer nozzle for consistent, correctly mixed application without manual weighing or mixing equipment. The cartridge system minimizes waste and ensures every dispense is at the correct mixing ratio for specification-quality bonds.

Technical Information

3M Scotch-Weld DP190 achieves its optical clarity through careful selection of base epoxy resin and hardener components that, when mixed and cured, produce a crosslinked polymer network with minimal light absorption and scattering across the visible spectrum. The formulation avoids colored pigments, opaque fillers, and reactive intermediates that would compromise the optical transparency of the cured film.

The cured DP190 maintains its transparency and structural properties after exposure to UV radiation, humidity, and the temperature cycling encountered in service. For exterior aerospace applications where prolonged UV exposure is expected, verifying the UV stability of the cured adhesive for your specific application duration and intensity is recommended, as all organic polymers experience some degree of yellowing with extended UV exposure.

Gap-filling capability of DP190 accommodates minor surface irregularities and non-planar bonding surfaces without requiring perfectly matched machined surfaces. The adhesive can fill gaps up to the thickness specified in the 3M technical data sheet while maintaining structural integrity, providing flexibility in joint design for production and repair applications.

Why Choose 3M Scotch-Weld DP190 Clear?

• ✅ Optically Clear — Virtually invisible bond line on any substrate color
• ✅ Structural Strength — High lap shear and tensile bond strength
• ✅ Glass and Polycarbonate Compatible — Transparency bonding applications
• ✅ Cartridge Format — Pre-metered, mess-free dispensing system
• ✅ 3M Scotch-Weld Quality — Globally trusted structural adhesive brand

Applications

3M DP190 is used for aircraft transparency bonding, display glass assembly, optical instrument bonding, clear composite panel bonding, and general industrial assembly where an optically clear structural epoxy adhesive is required.

Frequently Asked Questions

Q: What makes DP190 different from DP110?
A: 3M DP190 is optically clear while DP110 is gray. DP190 is selected when the bond line must be invisible, such as glass bonding, transparency assembly, and light-colored composite bonding.

Q: What is the MPN for 3M DP190 Clear 48.5mL?
A: MPN is 7100320603.

Q: Is 3M DP190 suitable for glass bonding?
A: Yes. DP190 clear epoxy is compatible with glass and polycarbonate substrates, making it suitable for aircraft transparency bonding and glass panel assembly applications.

Q: What is the cure time for 3M DP190?
A: DP190 cures at room temperature with handling strength achieved within several hours. Refer to the 3M Scotch-Weld DP190 TDS for specific cure schedule data.

Q: Does DP190 yellow after UV exposure?
A: Like all clear epoxy systems, DP190 may exhibit some yellowing after prolonged UV exposure. For exterior or UV-exposed applications, verify UV stability requirements against the 3M TDS for your specific exposure conditions.