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Home > Archive > Home Repair forum > October 2006 > Re: Fixing cracks in wooden "quoins" (corner blocks) in Italianate
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Re: Fixing cracks in wooden "quoins" (corner blocks) in Italianate
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| Lew Hodgett 2006-10-30, 1:25 pm |
| blueman wrote:
> Just to clarify, are you suggesting that wood epoxy or bondo are
> BETTER than caulk or that they would work too. The reason I am asking
> is that caulk would be easier but I want to do it right.
A couple of points of clarification.
First of all, I don't have a clue about what is the best way to make
these repairs.
As far as caulk is concerned, SikaFlex has an excellent tech service
group in Detroit and have an 800#.
I'd start with them.
Second, there is a world of difference between thickened epoxy and Bondo.
Bondo is polyester resin loaded with talc to thicken it.
Polyester is NOT an adhesive, does not add strength, but rather dead
weight, which is probably not a major concern for this application.
Epoxy thickened with micro-balloons is an adhesive and adds structural
strength.
Have fun.
Lew
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| Lew Hodgett 2006-10-30, 5:25 pm |
| RicodJour wrote:
> I realize it's not primarily marketed as an adhesive, but it does stick
> to sheet metal.
Actually, Bondo doesn't stick to sheet metal very well at at all.
That's the reason they poke holes in the sheet metal. It gives the
Bondo someplace to mechanically grab the sheet metal.
What Bondo really has going for it is low cost and the ability to be
feathered out to a very fine edge.
Lew
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| Lew Hodgett 2006-10-30, 5:25 pm |
| RicodJour wrote:
> But I think we agree that Bondo wouldn't be our first choice in the
> OP's situation.
I don't have a clue how to solve the problem at hand, but if you live
in the "Rust Belt" for a while and see all those hulks of sheet metal
driving around with the Bondo patches that have fallen off after a
couple of years, you soon lose any interest in the stuff except to fix
up junkers and dump them.
Lew
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| Lew Hodgett 2006-10-30, 8:25 pm |
| RicodJour wrote:
> Oh, absolutely! Bondo is applied in some horrific ways by people that
> wouldn't be able to wet the paper bag much less break out of it. I'm
> always tickled by the people that use Bondo and drive around like that
> - no primer, exposed to the weather - and expect it to last.
SFWIW, Bondo is owned by RPM, who among other things, also own
Rust-Oleum, and has their corporate headquarters on a farm located on
StRt3, about half way between Medina, OH and Brunswick, OH.
Trust me, there is no Bondo showing on the fleet in that parking lot.
Lew
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