Filling holes in hardiboard siding

[annaz]

What do you use to fill holes in hardiboard siding?

We have a few holes from screws that need filling.

[Susan]

I used a paintable silicone caulk to fill the numerous screw/nail holes in my siding that were left by the previous owner. I cut a hole in the tip of the caulk tube just slightly smaller than the screw/nail hole and placed the tip just into the hole and squeezed the caulk, wiped it smooth and let it dry, then touched up the paint to match the rest of the siding. Worked well and I have done it several times with success each time.