Does urethane add spine/stiffness to arrow shafts?

[kenner]

Hello,
I'm using spruce and fir arrow shafts and sealing them with Helmsman spar urethane. Will finishing arrows cause them to gain spine? And will more coats add more stiffness?

I have a very precise spine tester I made with a dial depth gauge, so I can run a test, but was just wondering if any of you had experience in this area?

Thanks!.... Ken

[COOCH]

Not in my experience however multiple coats will add weight.Helmsman spar urathane is my favorite sealer for arrows.

[Orion]

No. It will not change the spine.

[kenner]

Good to know!  Weight is not a consideration, when I'm talkin' overall weight of 575 grains.  Not usin' sights,, so I'll adjust.

Thanks!,,, Ken

[Stumpkiller]

http://tradgang.com/noncgi/ultimatebb.php?ubb=get_topic;f=1;t=103488

 http://tradgang.com/noncgi/ultimatebb.php?ubb=get_topic;f=6;t=006084

Apparantly urethane fumes do cause some memory loss.    :D

[Bjorn]

Charlie LOL!          

[Don Stokes]

No. At one point, I even tried a double dip soaking with source chemicals to react and create the polyurethane inside the shaft, but it made no difference in spine.

For some reason I can't remember what chemicals I used...

[SveinD]

Originally posted by Stumpkiller:
Apparantly urethane fumes do cause some memory loss.     :D  

Now that's a good comment if I ever saw one!