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Here's the arithmetic for getting ratio by weight for the standard Jeffco epoxy.

resin=9.5lbs/gal
hardener=9.0lbs/gal

Volume ratio is 1H:4R ie 1Quart Hardener:1Gallon (4 quarts) Resin or .25H:1R

(9.0/4)H:9.5R

2.25H:9.5R = 1H:4.223R
For every 1 part Hardener add 4.223 parts Resin by weight.
Total weight is therefore 5.223 for every 1 part Hardener.

Measure hardener.
Multiply by 5.223
Add resin till you hit that number.




Bill Gradwohl
IV-P Builder
N858B