Smooth on ratios

green valley gobbler · March 06, 2019, 07:15:23 AM

Just wondering if any one has any updates on smooth on ratios? Anyone using the 2 to 1 ratio and feel it provides a better bond?

Roy from Pa · March 06, 2019, 07:30:55 AM

Mix ratio is 1:1 by volume. When mixed 2A:1B by volume, EA-40® will achieve greater heat resistance and improved physical properties..

I've used the 1 to 1 for years and never had any problems.

The 2 to 1 is just to improve heat resistance and strength.

Either one works fine.

skeaterbait · March 06, 2019, 08:38:09 AM

2:1 will attain a higher heat distortion but realistically how many bows are going to get over 163° (after the build) let alone make it to 217°. And on top of that, how many home built easy bake ovens will reach a cook temp of 250°?

[attachment=1,msg2855726]

Flem · March 06, 2019, 10:08:53 AM

I use EA-40 as a gel coat, 2-1. In theory it should be harder at that ratio. Cant prove it, though.

kennym · March 06, 2019, 05:10:03 PM

Quote from: skeaterbait on March 06, 2019, 08:38:09 AM
2:1 will attain a higher heat distortion but realistically how many bows are going to get over 163° (after the build) let alone make it to 217°. And on top of that, how many home built easy bake ovens will reach a cook temp of 250°?

[attachment=1,msg2855726]

You can if you cover the thermostat with foil.... Don't even ask!!

Roy from Pa · March 06, 2019, 05:13:41 PM

OMG, I gotta ask.

Come on dude, what happened then?

LOL

Did something smoke?

kennym · March 06, 2019, 05:35:31 PM

Hot nuff the glass turned white .... junk bow

I don't even know why we did that either but never again!! Long time ago ...

Before internet when you hadda try something cause you couldn't google it...

Crittergetter · March 06, 2019, 09:09:10 PM

Hey guys, I did a couple of bows last summer and tested the peel resistance. It did seem to have a better bond than 1-1. I also noticed that for me it seems that uls bonds better than ul. Not sure why but it does seem to bond slightly better.

Anyways, I have adopted this as standard procedure simply because of the increased peel and heat resistance. I've done approximately 20 Bows this way and have no complaints, although I didn't have any complaints before either.
A little more glue is worth a little more piece of mind I guess. Lol