Bondo (3M)

Bondo Original Filler

Two-part (with cream hardener) · US · not yet reviewed

Short answer

Ready to sand: 20 minutes after application.
Working time ends: 3–4 minutes after application.

Start the clock

When did you apply it?
Outdoors, temperature
Where?
Thickness

Stated times

  • Working time ends3–4 minutes
  • Ready to sand20 minutes

From Bondo (3M) product page · checked 2026-10-24. Anything not listed isn’t stated by the manufacturer.

Conditions & fine print
  • Stated conditions: Best results at 45°F or above
  • Working time is only 3–4 minutes once mixed. Wait 45 minutes after sanding before priming.
  • Temperature range: 45°F to —°F
  • Region US. Formulas can differ between countries; check your container.
  • Entered from the manufacturer source; second review pending. Report outdated information
  • Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.

Questions

How long before Bondo Original Filler is ready to sand?

Bondo (3M) states: Cures in 20 minutes; then rough-sand with 80 grit and finish with 180 grit or finer. This is the manufacturer’s stated time, not a guarantee.

How long is the working time for Bondo Original Filler?

Bondo (3M) states: Working time is 3–4 minutes once mixed. This is the manufacturer’s stated time, not a guarantee.

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