Sending epoxy filled holes through the planer??

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Forum topic by ol104 posted 07-02-2013 09:41 PM 3013 views 0 times favorited 9 replies Add to Favorites Watch
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56 posts in 1020 days

07-02-2013 09:41 PM

hey guys – first time working with 2 part epoxy (West Systems). I filled some good size knot holes and crevices in cedar for an outdoor table without planing the wood to final thickness.

Will the cured epoxy damage my planer blades?

9 replies so far

View Loren's profile


7967 posts in 2682 days

#1 posted 07-02-2013 09:44 PM

Probably not but it may chip out.


View Jim Finn's profile

Jim Finn

1977 posts in 1956 days

#2 posted 07-02-2013 09:50 PM

I have filled small voids and cracks in mesquite and cedar with a finishing resin (very thin epoxy) and it planes just fine.

-- "Just my opinion, I may be right"

View OggieOglethorpe's profile


1002 posts in 1144 days

#3 posted 07-02-2013 11:21 PM

Epoxy planes better than it sands.

View richardwootton's profile


1669 posts in 989 days

#4 posted 07-02-2013 11:38 PM

I haven’t had any problems with it, I’ve also not had problems with finish sanding epoxy after planing, butit has always been in fairly small amounts.

-- Richard, Hot Springs, Ar -- Galoot In Training

View Woodendeavor's profile


268 posts in 1641 days

#5 posted 07-02-2013 11:42 PM

I fill large voids with epoxy(west system) and have found that you can plane it but if the epoxy had not had weeks or longer to cure it can pull some epoxy out of the fill. It is safer to sand but it will clog some paper. Here is a table I built with a large fill

View shipwright's profile


6175 posts in 1832 days

#6 posted 07-02-2013 11:47 PM

Epoxy planes just fine. It is more resilient than some other plastics like polyester and is unlikely to chip. The reason some epoxies don’t sand well is that many develop an “amine blush” which needs to be removed before it will sand well. It will also become thermoplastic if sanded hard enough to generate heat.
Bottom line… Go ahead and plane it.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees.

View ol104's profile


56 posts in 1020 days

#7 posted 07-02-2013 11:48 PM

Thanks for the help guys! Hands down my favorite woodworking site due to the other members. Most of the epoxy areas are actually on the bottom face of tabletop pieces and the unseen sides of the aprons. Most of it is simply to reinforce some knots and cracks in the wood. Some areas had a little bit of rot that I cleaned out and filled. Depending how some of the planing and sanding goes, I may keep some of them visible for character.

View DLCW's profile


530 posts in 1688 days

#8 posted 07-28-2013 07:46 PM

Do it all the time. I use West Systems as well. Have not had problems with dulling or chipping knife blades. The epoxy isn’t that hard really.

-- Don, Diamond Lake Custom Woodworks - - "If you make something idiot proof, all they do is make a better idiot"

View bondogaposis's profile


3362 posts in 1385 days

#9 posted 07-28-2013 08:10 PM

If you are talking western red cedar, those knots will be harder than the epoxy. No problem planing epoxy go for it.

-- Bondo Gaposis

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