Using more iso than resin | Equipment Q&A | Spray Foam Technical Questions and Answers | SprayFoam Magazine Q&A Forums

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Rob Wisneski Posted: Oct 08, 2014 04:09 PM	Using more iso than resin I always seem to have 2-3 gallons of resin left over from a set. I only spray 2 lbs. and have been using my e30i for over a year now, and it is pretty consistently leaving the same amount in the resin barrel. Now the second question, what does a guy do with the left over resin?
SprayFoamSupply.com Posted: Oct 08, 2014 09:20 PM	Typically with any sprayfoam, the iso is heavier per gallon than the resin. The sets are sold by weight, not volume. Let's say you get 1,000 set, 500lbs iso and 500lbs resin. This iso weighs 10.1 lbs per gallon at 70 deg F, but the resin weighs only 9.5 lbs per gallon at 70 deg F. That means in each set, you get 49.5 gallons of iso, but 52.6 gallons of resin per set. Your E30I proportions the material at a 50/50 ratio by volume, not weight. So if everything is running perfect, you should have 3.1 gallons of resin left at the end of every set. You should be combining these resin drums into a drum and then simply buy just a drum of iso from your supplier. I am curious if you asked your supplier about this and what his answer was. Did he have a clue? If not, you should find a new supplier! George

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Comments

Rob Wisneski

Posted: Oct 08, 2014 04:09 PM

Using more iso than resin

I always seem to have 2-3 gallons of resin left over from a set. I only spray 2 lbs. and have been using my e30i for over a year now, and it is pretty consistently leaving the same amount in the resin barrel.

Now the second question, what does a guy do with the left over resin?

SprayFoamSupply.com

Posted: Oct 08, 2014 09:20 PM

Typically with any sprayfoam, the iso is heavier per gallon than the resin. The sets are sold by weight, not volume. Let's say you get 1,000 set, 500lbs iso and 500lbs resin. This iso weighs 10.1 lbs per gallon at 70 deg F, but the resin weighs only 9.5 lbs per gallon at 70 deg F. That means in each set, you get 49.5 gallons of iso, but 52.6 gallons of resin per set. Your E30I proportions the material at a 50/50 ratio by volume, not weight. So if everything is running perfect, you should have 3.1 gallons of resin left at the end of every set. You should be combining these resin drums into a drum and then simply buy just a drum of iso from your supplier. I am curious if you asked your supplier about this and what his answer was. Did he have a clue? If not, you should find a new supplier!

George

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