Best Glue for Balsa - Woodworking Talk - Woodworkers Forum
 
Thread Tools Display Modes
post #1 of 14 Old 03-26-2015, 06:30 PM Thread Starter
Junior Member
 
Join Date: Mar 2015
Posts: 4
View Brishwi's Photo Album My Photos
Best Glue for Balsa

Hello all, new to this forum but I think I found the right place.

I build small balsa wood bridges for a high school science competition (small as in ~10 grams, pieces as thin as 1/32"). I have tried titebond wood glue, but it doesn't seem to hold up well. I have seen a few designs using a cement glue but I'm not sure what would be best.

I was wondering if someone has a good suggestion for a strong glue that can hold against large amounts of strain.

Thanks,
Brian
Brishwi is offline  
Sponsored Links
Advertisement
 
post #2 of 14 Old 03-26-2015, 06:33 PM
Sawdust Creator
 
ryan50hrl's Avatar
 
Join Date: Jun 2012
Posts: 8,047
View ryan50hrl's Photo Album My Photos
For very thin small pieces, I would test both super glue and 2 part epoxy.

The tools don't make the craftsman....
ryan50hrl is offline  
post #3 of 14 Old 03-26-2015, 06:35 PM
Senior Member
 
Join Date: Sep 2011
Posts: 26,079
View Steve Neul's Photo Album My Photos
For that application I believe I would use hot melt glue.
Steve Neul is online now  
Sponsored Links
Advertisement
 
post #4 of 14 Old 03-26-2015, 07:02 PM Thread Starter
Junior Member
 
Join Date: Mar 2015
Posts: 4
View Brishwi's Photo Album My Photos
Forgot to add that the goal of the bridge is to hold up 15kg of weight, so i don't think hot melt glue is a good option.
Brishwi is offline  
post #5 of 14 Old 03-26-2015, 07:08 PM
Senior Member
 
hwebb99's Avatar
 
Join Date: Nov 2012
Posts: 2,883
View hwebb99's Photo Album My Photos
Best Glue for Balsa

Why does titebond not work? Epoxy or super glue should work. Super glue would be faster.
hwebb99 is offline  
post #6 of 14 Old 03-26-2015, 07:15 PM Thread Starter
Junior Member
 
Join Date: Mar 2015
Posts: 4
View Brishwi's Photo Album My Photos
titebond works fine, but when I place the load onto the bridge the joints with the glue are the first to give out. It just seems that titebond doesn't work well with the strain.
Brishwi is offline  
post #7 of 14 Old 03-26-2015, 07:21 PM
Senior Member
 
Join Date: Sep 2011
Posts: 26,079
View Steve Neul's Photo Album My Photos
Quote:
Originally Posted by Brishwi View Post
Forgot to add that the goal of the bridge is to hold up 15kg of weight, so i don't think hot melt glue is a good option.
The problem with wood glue is you need sufficient glue surface and clamp pressure to make it work. Hot melt glue will adhere with a much smaller surface. Try it before you write it off.
Steve Neul is online now  
post #8 of 14 Old 03-26-2015, 07:35 PM
Village Idiot
 
epicfail48's Avatar
 
Join Date: Mar 2014
Location: Springfield MO
Posts: 4,945
View epicfail48's Photo Album My Photos
Quote:
Originally Posted by Brishwi View Post
titebond works fine, but when I place the load onto the bridge the joints with the glue are the first to give out. It just seems that titebond doesn't work well with the strain.
Most wood glues have a bit of 'creep' by design, so they can stand up to seasonal wood movement. Great for furniture, or in applications with a lot of surface area between glueing surfaces. Not so great for holding a high load on a small surface area, as you've found

My biological father built model airplanes from balsa, and the only adhesive I ever saw him use was super glue. Given the stress the parts of the plane would be under, I'd say super glue would be plenty strong enough for a bridge. I'd also wager that once dried the glue would be tougher than the balsa

I need cheaper hobby
etsy.com/shop/projectepicfail
epicfail48 is offline  
The Following User Says Thank You to epicfail48 For This Useful Post:
Brishwi (03-26-2015)
post #9 of 14 Old 03-26-2015, 08:07 PM Thread Starter
Junior Member
 
Join Date: Mar 2015
Posts: 4
View Brishwi's Photo Album My Photos
Thanks for the help everyone! I'll give all the suggestions a try and see how things go.
Brishwi is offline  
post #10 of 14 Old 03-26-2015, 09:42 PM
Junior Member
 
Join Date: Sep 2014
Posts: 8
View hal.hill73's Photo Album My Photos
I have constructed and flown RC airplanes for over 30 years. The best adhesive in use today are cyanoacrylate and epoxies. For the CA glues to be effective you need to have very tight joints. There are different formulations today with different curing times. You can pick them up at most hobby shops. In extremely high stress areas I oftentimes use 15 minute epoxy. I fly a 1/3 scale Cub with a 144" wingspan and it constructed primarily with CA glues with epoxy only at the firewall and wing root areas. Either CA or epoxy would be you best option.
hal.hill73 is offline  
The Following User Says Thank You to hal.hill73 For This Useful Post:
Brishwi (03-26-2015)
post #11 of 14 Old 03-27-2015, 07:02 AM
Senior Member
 
Join Date: Jul 2008
Location: Florida Panhandle
Posts: 12,475
View GeorgeC's Photo Album My Photos
Quote:
Originally Posted by hwebb99 View Post
Why does titebond not work? Epoxy or super glue should work. Super glue would be faster.
The wood is too porous.

George
GeorgeC is offline  
post #12 of 14 Old 03-27-2015, 07:04 AM
Senior Member
 
Join Date: Jul 2008
Location: Florida Panhandle
Posts: 12,475
View GeorgeC's Photo Album My Photos
Go to a model shop and buy your glue there.

If I remember from my youth the glue of preference is "Testers." Super glue dries too fast. You need time to get your parts in alignment.

Epoxy takes too long to dry.

George
GeorgeC is offline  
post #13 of 14 Old 03-27-2015, 03:33 PM
Junior Member
 
Join Date: Sep 2014
Posts: 8
View hal.hill73's Photo Album My Photos
There are different formulations of CA glues with varying drying/ cure times just like there are epoxies with working times of 5 minutes to several hours. Epoxy or CA either one would be a good choice; visiting a hobby shop is certainly the best source in this particular case.
hal.hill73 is offline  
post #14 of 14 Old 03-30-2015, 09:03 PM
Senior Member
 
Join Date: Nov 2013
Location: west Mich
Posts: 397
View tewitt1949's Photo Album My Photos
I also build RC aircraft. I use super glue and 6 min 2 part epoxy. They make at least 3 different thickness of super glue. Each is best for different applications. Thin will creep into the grain and strengthen the balsa wood. Thick is gap filling. You can also get activator to make it dry super fast. You may want to use super thin super glue to strengthen the wood in high stress areas. Just put some on the wood and it will soak in and travel up the grain of the wood then harden. It really strengthens the wood. Also they make different hardness/strengths of balsa wood.
tewitt1949 is offline  
Reply

Tags
glue

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Woodworking Talk - Woodworkers Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Glue for tricky wood + felt glue up buktotruth Tips, Tricks, & Homemade Jigs 7 05-01-2013 09:45 AM
Workbench edging/banding - glue or no glue? mikeintexas General Woodworking Discussion 4 12-20-2012 12:18 AM
detail gouge handle: to glue or not to glue? duncsuss Woodturning 5 01-09-2012 12:02 PM
Which glue/adhesive? Bent lamination. yes another glue thread. Kender General Woodworking Discussion 19 10-20-2009 08:34 PM
To glue or not to glue, that is the question. djonesax Joinery 7 10-11-2008 11:04 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome