Seymour Duramix™ Fast Set 300 Adhesive Product Details

Seymour Duramix™ Fast Set 300 is a clear 5-minute semi-flexible epoxy adhesive designed for quick repairs on metal, SMC, FRP, fiberglass, and most automotive plastic surfaces.

It’s excellent for targeted jobs that need more setup time before the adhesive sets. Use it when you need extra work time to position, align, hold, clamp, or tape the repair without giving up the fast handling, easy sanding, and paintability you depend on.

With a 5-minute working time, 10- to 15-minute handling time, and 15 to 30 minutes to sanding and painting, Duramix™ Fast Set 300 helps you handle small repairs efficiently while giving you more placement time than the Duramix™ Fast Set 40 or Fast Set 90.

5-Minute Work Time for Quick Repairs That Need More Setup Time

Some repairs need extra time to position the part, adjust the fit, hold it in place, clamp it, or tape the repair before the adhesive sets. Duramix™ Fast Set 300 gives you that extra working time while still getting a quick set.

Our fast-set automotive epoxy is perfect for small repairs that require careful placement and more setup time, without losing out on bond strength, sandability, or repair quality.

Our formula bonds to a variety of properly prepared automotive substrates and can be used on most semi-flexible substrates, making it an excellent choice when you want dependable results and superior performance.

Fast Set 300 Repair Applications

Typical applications for our 5-minute epoxy adhesive include:

• Bumper tab repairs
• Quick interior panel repairs
• Automotive clip retainer repairs
• Small bracket repairs
• Small plastic trim repairs
• Broken mounting point repairs
• Small metal-to-plastic & plastic-to-plastic repair applications

Use where a high-performance, sandable, and paintable epoxy is needed for quick repairs on automotive plastics, SMC, FRP, fiberglass, or metal, with extended work time.

Features & Specifications

• Clear 5-minute semi-flexible epoxy adhesive
• Bonds a variety of substrates
• Sandable
• Paintable
• Can be used on most semi-flexible substrates
• Fast set time for maximum productivity
• Mixing ratio: 1:1
• Work time: 5 minutes
• Handling time: 10 to 15 minutes
• Sandable: 15 to 30 minutes
• Paintable: 15 to 30 minutes
• Full cure: 6 to 8 hours
• 7 oz cartridge

Substrates

Duramix™ Fast Set 300, our 5-minute epoxy adhesive, may be used on properly prepared automotive substrates, including:

• Bare metal
• Primed & painted surfaces
• OEM e-coat
• Aluminum
• SMC
• FRP
• Fiberglass
• Most automotive plastics

*Polyethylene cannot be repaired with Duramix™ Fast Set 300, even when used with a plastic adhesion promoter.

Application Notes

• For professional use only.
• Dry fit parts before applying adhesive to confirm proper fit and alignment.
• The use of a plastic adhesion promoter is not recommended on fiberglass, SMC, FRP, steel, or aluminum.
• Follow applicable OEM repair procedures, manufacturer recommendations, and product instructions for surface preparation, application, curing, sanding, and refinishing.
• Refer to the Safety Data Sheet (SDS) and product label for safe use and handling instructions.