My house is 20 yrs old, in the Central Valley of N. Calif. I've got a
couple fascia boards (2X6 fir) that are showing age: the ends have
split a bit and look a bit ragged. There isn't' any major rot or
I plan to srape the paint off, sand smooth, fill the gaps and roughs
spots, prime and re-paint.
Q: What is the best exterior wood filler for this use?
Thanks a heap
BTDT w/ Bondo AND epoxy...............on redwood window sills.
Bondo not compatible w/ redwood
Bondo lasted ~1 year
Epoxy is much more expensive but my time is worth it
I never used Bondo again outside
epoxy >>>>>> abatron or smith&co (NorCal - RIchmond?)
Interesting. I'm sure fixing the area twice made you happy. Since Bondo
lists "exterior wood filler" as one of the uses for their product, do they
have a disclaimer about redwood? Any chance your experience was due to
something other than "incompatability" - maybe you didn't cut back to a good
enough foundation or something?
Trust me, been using epoxy for over 30 years in all sorts of
Back in 1986 I "restored" weathered south facing sills & sashes. I
compared the cost of Bondo & WoodEpox (Abatron)
Whoa! The wood epox was EXPENSIVE! Like 4x or 5x the Bondo.
Cost being a consideration at that time, I chose a Bondo wood repair
material not the typical car repair stuff. This stufff was called wood
repair "whatever". I had trouble with it from the get go.
Being a rather anal engineer & more than a little upset. I gave their
tech support line a call. The guy I talked to said that although the
can said it was ok for wood AND exterior apps they recommended against
use on redwood.
I asked if this was some sort of secret part of the spec. ;)
The stuff I used was made by Bondo, came in a quart (or 16oz ?)
rectangular can w/ a little tube of clear catalyst.
I mixed per instruction............the stuff sucks for redwood!
Luckily I only did six window sills & no sashes w/ it. I did the
remaining 11 sills & ALL 35 shashes with WoodEpox products.
Twenty years later the Bondo sills look like they were never worked on.
The wood epox sills & sashes need a little sanding & paint.
For badly weathered wood; the wood epox system is awesome. Remove
rotted / unsound material as best you can. Saturate with LiquidWood
(runny stuff). When cured, build up cavities / missing features with
WoodEpox. When cured.......drill, sand, prime,paint just like wood.
When I used the stuff it somewhat moisture sensitive.
The wood has to be dry & the stuff had to be mixed well, given an
induction period & protected from rain or dew until cured.
Maybe they've changed formulation or got some extra additives now for
the mositure issues. I still have some left & it still mixes up &
cures 20 years later! I use the old stuff for indoor repairs. When I
get back to outdoor stuff I'll get a new batch.
one word answer: BONDO, same stuff for car repair but much less money,
permanent, weatherproof, no shrinking, sands, paintable and CHEAPER than
all the rest. been using it for 35 yers in old home restoration work! even
on rotted window sills
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