Red cedar bench wood filler

[fitter30]

Top of bench is 1/2 log was used inside now wife wants it outside under a covered porch. Dug out most of the soft wood. Didn't know if there's a filler or the best way to repair.

 

[mm08822]

If you aren't going to stain/preservative, try using a belt sander to make saw dust from a scrap (or maybe from underside). Mix saw dust with outdoor wood glue to make a paste. Fill, let dry, sand.

Try a sample underneath first.

 

[Shiftless]

Build a dam around all 4 sides and pour in clear liquid epoxy.

 

[Hooked]

Either of those will work. You could also mix some ground rock, turquoise, etc, or possibly coloring,with the epoxy to fill the larger holes.

 

[fitter30]

Good idea's

 

[Hank11]

Most epoxies won’t last long outdoors without some kind of topcoat.

 

[WillyBoy]

Like Hank said. Continuous UV sun exposure will eventually break down the epoxy.
Look for a good, clear UV coating. A boat builder website should have something useful.