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Tenax-7R question

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  • Member since
    April 2003
  • From: Hayward, CA
Tenax-7R question
Posted by MikeV on Monday, February 16, 2004 8:36 PM
Hey guys,

How long do you have to leave the plastic to cure before sanding it after using Tenax-7R? I had assumed 24 hours was required, but it said on the internet that it is fully cured after 5 minutes. So can I sand a wing seam after only 5 minutes?

Thanks

Mike

Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom. " Charles Spurgeon
  • Member since
    February 2003
  • From: Sandusky Ohio, USA
Posted by Swanny on Monday, February 16, 2004 8:44 PM
I would give it a little longer than that. I usually give it at least twenty minutes or so to get nice and hard. It also depends on how much glue you applied.
  • Member since
    February 2003
  • From: A Spartan in the Wolverine State
Posted by rjkplasticmod on Monday, February 16, 2004 8:58 PM
I agree with Swanny, although I usually wait about an hour cause I'm cautious. Never had a problem with it being uncured. The 5 min. wait would be risky in my opinion.
RICK At My Age, I've Seen It All, Done It All, But I Don't Remember It All...
  • Member since
    April 2003
  • From: Hayward, CA
Posted by MikeV on Monday, February 16, 2004 9:22 PM
So waiting about an hour should be fine then regardless of how much was used? I applied it with my Touch-N-Flow applicator so there was not a huge amount applied.

Thanks

Mike

Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom. " Charles Spurgeon
  • Member since
    December 2002
  • From: Massachusetts
Posted by ajlafleche on Tuesday, February 17, 2004 10:19 AM
I've never timed this, but I tend to wait longer before any sanding I need to do. Now, I may build differently than you since I always have several projects going, so I can set aside an assembly wating for sanding for as day or so and still get a lot done. Basically, though, you want to make sure the plastic has hardened. Gently pressing a finger nail or touch pick to see if there's any give would tell you if you're ready fo sand. If there's no give, it's cooked.

Remember, if the women don't find you handsome, they should at least find you handy.

  • Member since
    February 2003
  • From: A Spartan in the Wolverine State
Posted by rjkplasticmod on Tuesday, February 17, 2004 7:06 PM
ajlafleche makes a good point. The Tenax itself will be dry in no time, but it creates a weld by melting the adjoining surfaces and they bond together. Tenax isn't a glue in the sense that CA or epoxy or tube glue is. By itself, it has no bonding power, but it causes the plastic to melt and bond. When doing wings or fuselage seams, a small bead of melted plastic will form along the seam if you have applied a little pressure during the bonding application. Sanding this off when it has hardened eliminates the seam, which is the big advantage of using Tenax. As long as the melted plastic has hardened, it's safe to file &/or sand.
RICK At My Age, I've Seen It All, Done It All, But I Don't Remember It All...
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