Replies

1. 
   AlanTurner | Apr 22, 2004 06:15pm | #1

   I recommend Unibond 800 for bent laminations.  It dries rigid, and brittle, and does not hurt plades.  Pretty waterproof, also.  Daryl at Vacuum Pressing sells it, and he may be the only source.  I think I recall that it is about $17 per 1/2 gallon, his smallet quantity, but the shelf life is excellent if you keep the liquid in your beer cooler.  He syas 2 years, but I think 3 or 4.  You will know when it goes bad becuase it gets too thick to use.  It is tintable as well, but the normal color is a light tan.  Use a foam roller to spread it.  Good open time also.

   Alan

   Alan

   http://www.alanturnerfurnituremaker.com

2. 
   HowardAcheson | Apr 22, 2004 06:26pm | #2

   The best adhesive for bent laminations is a urea formadehyde. Unibond is a good choice. You can also use DAP/Weldwood Plastic Resin. The Plastic Resin is a watermixed UF adhesive while the Unibond is a two chemical mixture. Both will work just fine. Both are highly water resistant.

   The reason to use a UF is that it has virtually no creep. Creep is a characteristic where the adhesive allows surfaces to slip along each other under tension. Of course, bent laminations are always under tension. Yellow adhesives do have poor shear strength. Poly adhesives exert large pressure as they cure and need tight, continuous, long term clamping or they will allow the delamination.

1. 
   silver77 | Apr 24, 2004 07:24am | #5

   Plastic resin- is it the same thing as marine glue...mix 2 parts brown powder to 1 part water.

   And is plastic resin a urea formadehyde glue?

   thanks,

   silver

1. 
   HowardAcheson | Apr 24, 2004 09:10pm | #6

   Here is the stuff: http://www.dap.com/retail/retail_detail.cfm?catid=28&subcatid=103&prodhdrid=42

1. 
   silver77 | Apr 24, 2004 11:00pm | #7

   cool site. I'm a Dap fan.

    

   The product I buy in Canada is by Dural: marine /plastic resin glue;same glue.

    

   I love this glue...long open time/mix with water/easy clean-up/inexpensive/stronger than

   wood/ and waterproof. I recently worked with a woodworker who had learned the oldtimers

   used to mix plastic resin with pva...to get a waterproof pva...said it worked for them...

    

   thanks howie,

    

   silver

1. 
   ABenker | Apr 26, 2004 04:27pm | #8

   Thanks for all of your reply's i ended up using West System Epoxy from Rockler with a slow cure hardner. The glueup went well, I have left it in the clamps for 2 days and i will pull it out tonight to see how it looks. Thanks again for the responses. I'll let you know how the finished product looks tomorrow.

2. 
   Michmesquite | Apr 26, 2004 11:27pm | #9

   I like epoxies for their long open time. I use System Three T-88 Structural Epoxy Adhesive. Stays open about 1 hour at 75 degress.__________________________________________________________

   Michael in San Jose

   Freedom from mental disturbance is the very most for which one can hope.

    Epicurus (341-270 BCE)

3. 
   ABenker | Apr 27, 2004 04:41pm | #10

   Thanks for your responses the lamination turned out great. I had about 1/2 inch of spring back that I had accounted for prior to starting.

   Thanks,

   Aaron

2. 
   MBL | Apr 30, 2004 02:44am | #13

   Dear Howie and other contributors,

   With yellow glue, the clamps can be removed in about 1 hour, to re-use the clamps, for instance.

   With the Weldwood Plastic Resin, what timing would that be?

   Also, is this glue more gap-filling than yellow glue, say about 1/32" of gap?

   What is the apx. cost of an 8-lb bucket in the US? Is it available in smaller quantities for test purposes?

   Thanks.

   -mbl-

2. 
   JerBear | Apr 28, 2004 02:11pm | #11

   Does recoursinal (sp?) glue fall into this category?  I have used that in the past and had great results.  Totally waterproof.

1. 
   HowardAcheson | Apr 29, 2004 05:19pm | #12

   Urea resorcinol is an excellent adhesive. It is the most water and heat proof of all consumer available adhesives. It has no creep. But, I does leave a purple glue line that is objectionable to many if the item is going to be clear finished.

3. 
   jazzdogg | Apr 22, 2004 06:41pm | #3

   Aaorn,

   I agree with the other posters: Unibond 800 and Weldwood plastic cement are both good products for glue-laminations. I'd stay away from "gorilla Glue" if for no ther reason than its unacceptable messiness! Don't forget good old epoxy: it's weatherproof, doesn't creep, and, with the addition of micro balloons, has gap-filling abilities.

   You didn't mention whether you have done a lot of glue-lamination projects before. Please let us know if you'd like additional information. Bending forms and clamping strategies are among the greatest challenges.

   Good luck,

   -Jazzdogg-

   Whether you think you can, or you think you can't, you're right.

1. 
   ABenker | Apr 23, 2004 07:43pm | #4

   Thanks for the replys. Jazzdog, i haven't done a lot of laminations, but i have the form built out of several layers of MDF and i have run a dry run on the clamping. Thanks again for the info. I will  see if Rockler carries any of these products.

   Aaron