Hi Netters A question was asked about the results that occur when the ratio of epoxy /hardener are off spec. Don Reid said it all. To make this more clear to you, do a little experiment. Mix up a small batch of epoxy using the correct ratios. Mix up several other batches but increase the amount of hardener on each batch by 10%. Do this for 5 batches. Note their curing times. Be sure to put a wooden stick into each as they harden. Test the results by bending bashing etc to destruction for each case. Repeat the same experiment for a change in the amount of epoxy for a constant amount of hardener. The results are going to be a caution to use the most correct ratio epoxy/hardener ratio possible as specified by the manufacturer. Further when you mix the batch, drain it into another container , scrape the walls of the original mixing container well. Mix again in the second container before apply in the epoxy on your plane. It took a while before I found that I had not always properly mixed all the epoxy off the side of the can, so that toward the end of the batch , if I scraped the sides , I might not be getting the correct epoxy/hardener ratio mix. The worst case scenario occurred when I was making a top for my trailer. The foam was 1/2" thick. The outside was done and epoxyed in place. The inside was then epoxied and left to cure over night. Result----nothing. I had forgotten to add the hardener. Procedure-- The ratio was 5 epoxy to 1 hardener. I rolled on with a roller , the hardener and in places painted on the hardener with a brush. The next day it was all hard. Quality ???. But it did last 20 years. But then it was only a trailer top. Regards Harold Woods Orillia, ON. Canada haroldwo...@rogers.com
