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A lighter epoxy than J.B. Weld

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Forum topic by Cluelessmoose posted 1260 days ago 1315 views 0 times favorited 14 replies Add to Favorites Watch
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Cluelessmoose

8 posts in 1260 days


1260 days ago

Hi all, new to the boards.

I’m looking for a lighter epoxy than J.B Weld that has similar stiffness and flex strength.

All suggestions are appritiated, thanks in advance.


14 replies so far

View Jim Finn's profile

Jim Finn

1637 posts in 1518 days


#1 posted 1260 days ago

lighter weight? .... Lighter color? .....thinner when wet?..... Zpoxy is very thin when mixed. I use it to fill in cracks and voids in Mesquete and cedar. I get it at the local hobby shop.

-- In God We Trust

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Cluelessmoose

8 posts in 1260 days


#2 posted 1259 days ago

Lighter weight, it’s going on a tennis racket so the project is kinda weight sensitive.

View childress's profile

childress

841 posts in 2137 days


#3 posted 1259 days ago

You want a 2 part liquid epoxy. Anything will work like locktite or gorilla. It’s hard cause you only need a little and unfortunately the “little” packages are quick set epoxies. Usually 5 min. Alot harder to work with but will do the job. If you know someone that has something like west system epoxy then that would be ideal, otherwise your stuck with the quick stuff…

-- Childress Woodworks

View thiel's profile

thiel

359 posts in 1888 days


#4 posted 1259 days ago

West System? Known for being almost runny… and they sell various fillers to add to get the viscosity you desire…

-- Laziness minus Apathy equals Efficiency

View HorizontalMike's profile

HorizontalMike

6914 posts in 1510 days


#5 posted 1259 days ago

Use Cabosil to thicken the West System epoxies. Buy the SMALLEST quantity you can as it goes a really long ways.

-- HorizontalMike -- "Woodpeckers understand..."

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Cluelessmoose

8 posts in 1260 days


#6 posted 1259 days ago

I’m going to check out the West System epoxies, thanks guys.

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Cluelessmoose

8 posts in 1260 days


#7 posted 1259 days ago

Good idea Cenessa, should be perfect as long as I don’t add too much.

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childress

841 posts in 2137 days


#8 posted 1259 days ago

Actually, I remember a tech support guy at west system telling me that they have little packets for single use. Give them a call to find out more…

-- Childress Woodworks

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Cluelessmoose

8 posts in 1260 days


#9 posted 1258 days ago

I plan to call west system tomorrow for info, thanks.

Yea, I was thinking about fiberglass too actually. Thanks again, Cenessa. :)

View DrDirt's profile

DrDirt

2353 posts in 2338 days


#10 posted 1258 days ago

You can get longer set epoxies at hobby shops that sell RC airplanes and such.
Our local shop has up to 60 minutes – but 5, 12 and 30 are most common.
When I was glassing the foam wings on RC airplans, we used Zpoxy from the hobby shop.

For Z-Poxy and Smooth ‘n’ Easy, I use 1 part resin, 1 part hardener, and 1 part denatured alcohol (don’t use rubbing alcohol, which is diluted with water). Mix thoroughly. The alcohol won’t effect the strength of the final product. It’s very volatile, and it’ll evaporate well before the resin starts to cure.

-- "If we did all the things we are capable of doing, we would literally astonish ourselves." Edison

View TopamaxSurvivor's profile

TopamaxSurvivor

14584 posts in 2271 days


#11 posted 1258 days ago

DrDirt What does the denatured alcohol do?

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View ChrisForthofer's profile

ChrisForthofer

150 posts in 1663 days


#12 posted 1258 days ago

Topamax,

I believe its just to thin the epoxy, acetone will also do the same. Both will evaporate before the epoxy starts to cross link.

Chris.

-- -Director of slipshod craftsmanship and attention deficit woodworking

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TopamaxSurvivor

14584 posts in 2271 days


#13 posted 1257 days ago

Guess one could do that with most any epoxy to make it flow a bit, eh?

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View DrDirt's profile

DrDirt

2353 posts in 2338 days


#14 posted 1257 days ago

Yep it would flow – I wouldn’t thin epoxy for laminating strips of wood. Not sure it would be a problem, but I am not sure when the sandwich would be clamped up if the extra solvent could escape before the epoxy set up, versus creating a weak joint as the solvent goes away over several days and leaves voids. I haven’t used acetone, but that is because acetone would eat the styrofoam cores I worked with.

We always thinned for doing the glass mat – same for flow would work for glassing wood strip canoes/kayaks etc.

-- "If we did all the things we are capable of doing, we would literally astonish ourselves." Edison

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