I'll agree with the others. The canned foam requires moisture to cure while the 2-part does not. I have used the canned and haven't quite had the disasters others have. However, I had heard enough to move on to 2-part. The 2 part is easier to use as you can pour it before it begins to expand. I've used it large (5.5" cone) and small (small paper tip on a cone) applications with no problem. I also found it far less messy. Well, I have to recant. I've never had a fin can or cone blow up, but I have had some terrible messes to clean up and I'll count them as disasters . One of the problems with the canned foam seems to be that, in order to get it to the far end of a gap, you have to keep spraying, which leads to way too much product being used.

__________________
- Dick
NAR L2, member of MDRA and NARHAMS
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