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Tillersweep

5:1 compared to 2:1

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I have some vacuum bagging to do and the description says I should use a 2:1 kit.  Fine.  I will but why?  

What is the 5:1 better for (anything?)  It seems more prone to amine blush.  It is more brittle.  

 

Thanks.  

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The 2:1 is a slightly lower viscosity and supposed to be blush-free.  The 5:1 does and will perform well in vacuum bagging applications, it is slightly stronger than 2:1 but not by much.  In vacuum bagging, if you use peel ply it will remove any possible blush when it is removed and in the bagging process the atmosphere is really limited which will reduce any blush.  So the bottom line is you can use 2:1 or 5:1 resin, both will work.  If you are doing a large layup, the 2:1 will flow a little better.

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