micro balloons
 

Can you mix wood glue with micro balloons for a fillet?

RE: micro balloons
 

anybody?

RE: micro balloons
 

I mixed them with yellow wood glue for a wing saddle. I used waxed paper on the wing. It worked but was very hard sanding. I probably did not use enough balloons; it was like toothpaste. I should have made so it was more like pie crust; a little drier. I would try a test batch first to zero in on the proper consistancy.

RE: micro balloons
 

Balloons?

RE: micro balloons
 

i've mixed clean balsa sanding dust with wood glue with good results.

RE: micro balloons
 

For building fillets, I use the light weight Spackling compounds we use to fill dings and dents.

RE: micro balloons
 

Seems like spackling compound might be a little too brittle. Bet it sands nice though.

RE: micro balloons
 

I get much better results mixing with epoxy. Wood glue seems to gum up and if application is thick like a wing fillet it takes a long time to dry. Ballons seem to set up epoxy quicker, do not use 5 minute variety

RE: micro balloons
 

If I'm making a fillet I will get roughly the
shape I want with balsa or foam and then skim coat
that with a mixture of Z-poxy finishing resin and
micro ballons. Strong, lite,and sands like spackle.

Regards,
Roby

RE: micro balloons
 

I use finish reson with micro ballons. I found epoxy sands hard, like ply. Finish reson sands fairly easy like hard balsa. Either way works. Alcohol on your finger tip can help smooth it to reduce sanding. A mix like toothpaste is about perfect.
Edwin

RE: micro balloons
 

where can u get a small amount of finishing resin

RE: micro balloons
 

Hi!
No! White glue or aliphatic glue doesn't do a good mix with micro balloons!
In a store that sell paint!
But...professional 24hour epoxy is tougher than polyester resin!
Brown colored micro balloons is best, those are made from plastic! Much easier to sand than white (made from glass) micro balloons.

RE: micro balloons
 

dalo , try this , baking soda mixed with epoxy , it works excellent

RE: micro balloons
 

I got my finish reson from the local hobby shops. Tower has pretty much the same thing.
http://www3.towerhobbies.com/cgi-bin...?&I=LXK304&P=7
Edwin

RE: micro balloons
 

Another good substitute for micro balloons is corn starch. I use it all the time and it works great.

Ken

RE: micro balloons
 

I have a bottle of M balloons I just do not have any epoxy other then 5-min. Just one of those things where I dont want to buy anything more when I only need about a half of a teaspoon. I guess I will get some 24h epoxy.

RE: micro balloons
 

I found that Super Fil sands almost as easy as balsa, [link]http://www.stits.com/store/msc.html[/link], $20 for a quart is hard to beat. Never tried wood glue however, if I would I beleive I would use white Elmer's rather than Titebond. The yellow colored glues seems to be more rubbery than the whites.

RE: micro balloons
 

Micro balloons do not work with PVA or aliphatic resins (white and yellow glues). Both 5 and 30 minute epoxies work just fine wilh micro balloons. Just mix up what you need to the consistency of cake icing. If you need it to retain its form add more balloons. You'll get used to it pretty quick and know what you need for a given application. Both epoxies will form a nice smooth finish if you stop working them early enough. You can also smooth them out before the epoxy sets by wetting your finger with denatured alcohol. Regular isopropyl (rubbing) alcohol also works if that's all you have just not as good. Additionally, the more 'balloons' that you add the easier it is to sand. Wet sanding also helps as long as you don't get carried away and soak the surrounding wood with water. Micro balloons are preferred over other fillers due to weight. This is why they are also used on full scale composites. Other fillers (sawdust, baking soda, etc) just add extra weight. You also need to remember that micro balloons are a filler only and do not add structural strength. For that you would need to add chopped fibers.

RE: micro balloons
 

i use polyester resin and micro balloons over 1/64 ply on my fillets and it works perfectly. i'm in the painting stages of the plane so even better to see how well it works. nice and smooth.
http://www.rcuniverse.com/forum/m_68..._1/key_/tm.htm

RE: micro balloons
 

I happen to use micro balloons and finishing resin - will try RC's cornstarch suggestion.

Like others, I create a very dry paste. I use it to fill around control rod tubes and build up wing saddles and shape around the leading edge of the wing. Use wax paper to isolate the putty from the wing. I don't use all of the paste but reserve a dab leaving it on the wax paper. I take the dab back to the real world and keep tab of how it hardens. When it gets beyond "refrigerated cookie dough" consistency I go back down to release the wing from the saddle and remove any wax paper. At this stage this stuff is firm enough to hold its shape but soft enough to be cut easily with a razor blade or x-acto knife - don't overdo the trimming 'cause it sands pretty easily when dry. After trimming I leave it overnight to harden before sanding.

Cheers,