HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Jan 22, 2011, 12:50 AM
Registered User
ForeverFlying's Avatar
Christiansburg, VA
Joined Sep 2002
790 Posts
Discussion
Sandable Glue?

Dear Forum,
Does anyone know of a glue that is truly sandable? I was thinking of trying mixing microballons with titebond, and thinning it a little.
Thanks!
Mike
ForeverFlying is offline Find More Posts by ForeverFlying
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 22, 2011, 01:10 AM
Jim C Patrick
jcpatrick's Avatar
Shenandoah County
Joined Jan 2008
883 Posts
Duco. Still available after all these years.
Ambroid . . . . if you can find it.
If you use a lot of microbaloons, like mostly microbaloons, epoxy will sand readily.
jcpatrick is offline Find More Posts by jcpatrick
Reply With Quote
Old Jan 22, 2011, 10:52 AM
Registered User
Joined Jul 2005
1,872 Posts
I think the real question is being, "Do you know of a glue" softer than the adjacent materals? As you mentioned, finding a glue is the easy part. Sanding off the excesss is the hard part.


Wm.
coosbaylumber is offline Find More Posts by coosbaylumber
Reply With Quote
Old Jan 22, 2011, 12:04 PM
Registered User
Joined Dec 2009
1,938 Posts
I use Ambroid or Titebond 1 as these will readily sand. The real secret it to not leave a lot of the excess glue on the wood surface when you build. Wipe off the excess immediately and let the glue dry so it doesn't ball up when sanding. I use 180 and then 320 grit when sanding these glue lines.

Soft landings,

Joe
piperjoe is offline Find More Posts by piperjoe
Reply With Quote
Old Jan 22, 2011, 02:10 PM
B for Bruce
BMatthews's Avatar
The 'Wack, BC, Canada
Joined Oct 2002
11,602 Posts
Most or all of the PVA (Poly Vinyl Acetate) white and aliphatic resin yellow wood working glues are somewhat rubbery when you try to sand them. Hence they resist being cut down and the wood around them takes the brunt of the abrasion.

As mentioned keeping the glue lines thin and wiping away the excess (as opposed to smearing it around) helps a lot. And once down to the sanding a proper block to support the paper and using fresh sandpaper that cuts rather than plows helps a huge amount as well. With a fresh sheet you can use light force and guide the block more effectively so you concentrate the cutting on the glue line. Then blend the wood to suit.

CA glues are notoriously harder than balsa but they are at least not rubbery. But fresh sandpaper and a block for support is still mandatory.

In both cases only the final smoothing sanding should be done with folded over "loose" sandpaper.

Sigment, Ambroid and Duco are all nitrocellulose plastic dissolved in solvent style glues. These have the advantage that the resulting plastic sands very easily. Very much like balsa in fact. For use on structures where there will be a lot of exposed glue lines that will need sanding I still prefer to pull out this style of glue.
BMatthews is offline Find More Posts by BMatthews
Reply With Quote
Old Jan 22, 2011, 06:30 PM
Marion
USA, NC, Hillsborough
Joined Oct 2003
1,027 Posts
Ambroid and Elmer's Carpenter glue work well for me. The Carpenters glue seems different than the other "white" glues....
Marion is offline Find More Posts by Marion
Reply With Quote
Old Jan 23, 2011, 10:14 AM
Will fly for food
Maryland
Joined Sep 2004
8,424 Posts
Carpenter's glue is not white glue, it is Alphatic glue. Like Titebond.
Pinecone is offline Find More Posts by Pinecone
Reply With Quote
Old Jan 24, 2011, 09:52 PM
Balsa + glue + bluesky= fun
leaktech's Avatar
Phoenix AZ USA
Joined Jan 2009
815 Posts
I use all the types of glues. It takes a while to learn when to use what. Like most here have said cleaning up the glued joint is the best way to keep your model smooth and finished with little sanding. Buy a pack of bamboo skewers at the 99cent store. Then sand the ends to a few different shapes so you can clean up the joints.....sharp flat, sharp point, dull point, angled, etc. The dull point will leave a fillet in corners. The angled will reach into hard to access joint and wipe it clean. After you lift the structure from the plan/wax paper you may have some cleaning up to do with a sharp razor but the glue that's left is so thin you can see through it. You can also use the bamboo to apply glue carefully. A stick with a short .031" music wire glued into the end makes a great way to apply CA carefully. Put a puddle of CA on an old jar lid and pick some up. Bend the wire into a V shape so you can pick up more. My favorite glue is Tite Bond. Use Duco if you want to unglue something in the future with acetone. This is good for stabs until your model is trimmed.
leaktech is offline Find More Posts by leaktech
Reply With Quote
Old Jan 25, 2011, 01:34 AM
Registered User
ForeverFlying's Avatar
Christiansburg, VA
Joined Sep 2002
790 Posts
Thanks everyone! Great advise. Model builders possess a great deal of knowledge, and love to share it with others!
ForeverFlying is offline Find More Posts by ForeverFlying
Reply With Quote
Old Jan 25, 2011, 06:15 AM
Closed Account
Joined Dec 2006
4,258 Posts
Testers still makes a glue similar to Ambroid's and Duco. I've found Duco in my local Hardware store.
Mode One is offline Find More Posts by Mode One
Reply With Quote
Old Jan 28, 2011, 09:52 AM
Registered User
doc993's Avatar
United States, WI, Stoddard
Joined Dec 2009
1,150 Posts
Add west system 407 to any epoxy it sand very well.
Also mix light weight Spackle and water based poly, 407 works with this too.
doc993 is offline Find More Posts by doc993
Reply With Quote
Old Jan 28, 2011, 03:30 PM
Registered User
Toysrme's Avatar
Birmingham, Alabama
Joined Jun 2002
2,970 Posts
PVA (wood glue) and epoxy via thinning (denatured alcohol) and/or microbaloons. All easily sanded.
Toysrme is offline Find More Posts by Toysrme
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
? on Sandable Glue and what to make sheeting bend mag1 Scale Kit/Scratch Built 14 Nov 18, 2005 08:37 PM
Sandable Foam to Foam Glue? GeeBeeFan The Builders Workshop 5 Mar 25, 2005 04:02 PM
best sandable primer? Bob K Foamies (Kits) 1 Oct 10, 2002 12:50 PM
Foam Safe light Sandable Primer S Anastasio Foamies (Kits) 1 Feb 02, 2002 09:40 PM