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Author Topic: Smooth on ratios
Lee Lobbestael
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There seems to be a discrepancy concerning the ratio of part A to part B with smooth on. The cans I have had all say to mix at a ratio of 70:30 A to B by volume I believe. Most people I have talked to mix it 50:50 by volume but some said they mix it by weight and some said they use a different ratio. Whats the deal with this?
Posts: 388 | From: Michigan | Registered: Jan 2009  |  IP: Logged | Report this post to a Moderator
Crooked Stic
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This is right out of the horses mouth
web page

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High on Archery.

Posts: 3132 | From: Princeton IN. | Registered: Dec 2003  |  IP: Logged | Report this post to a Moderator
macbow
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Mix ratio is 1:1 by volume. When mixed 2A:1B by volume, EA-40® will achieve greater heat resistance and improved physical properties.. "from web page"
So does anyone use the 2A : 1B I use the equal by volume on my wood laminate bows.

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Al Dean
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I mix 1-1, but am not critical about it. Close is completely good enough.

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Shredd
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As a rule of thumb I always use a little more A than B... If I use 40 grams of A I will use 35 grams of B... That way I am always on the good side of things and there is less waste in the end...
In your standard epoxies if you don't mix them exact it could have problems reaching it's full potential... It's kinda like having more bolts than there are nuts for a project... If you have 10 holes, 10 bolts and only 7 nuts only 7 bolts will do the holding... Only the bolts with nuts will hold...
So that is why I err to the good side...

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bigbob2
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for a 4 lam longbow, and I know this weight is in grams, not ounces but I use 72 g of A to 58 G of B. Works very well.
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jsweka
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quote:
Originally posted by Al Dean:
I mix 1-1, but am not critical about it. Close is completely good enough.

Yup! One dixie cup of each part is how I do it and never had a problem.

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bamboo
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2a--1b here---clearly harder--more peel resistance

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Mike

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Crooked Stic
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I would tend to agree with you. Do we know anyone who sells it for the 2 to 1 mix?

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High on Archery.

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monterey
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I do 1:1 by volume and it seems to work fine.

Which one is A and which B?

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Monterey

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JamesV
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where can I buy half a can of B??????????

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kennym
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I can get quarts of A only if you guys want it , then with a quart kit and the extra quart of A you are good to go .

Sorry , can't get pints of A only.

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Stay sharp, Kenny.

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Robertfishes
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Monterey, the cans are marked A or B. I mix 1:1 but I usually add a little extra part A. I always have about 8 oz in the B (blue quart) can when the A (yellow quart) can is empty.
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kennym
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Part A is yellow can.

If you use too much hardener, it won't set up properly.

So said a fellow who did to set it faster and called Smooth-on to ask. (not me this time but a customer who thought he got some bad glue.)

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Stay sharp, Kenny.

https://www.kennysarchery.com/

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kennym
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Oops , dbl post

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Stay sharp, Kenny.

https://www.kennysarchery.com/

Posts: 11972 | From: Linneus , Mo. | Registered: Jan 2004  |  IP: Logged | Report this post to a Moderator
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