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Hi,
We use a granular bentonite product that is commonly used in the drilling industry. Benseal is one trade name, 8/25 mesh bentonite is the spec. When mixed with water it creates a watertight seal that has the consistancy of very thick peanut butter. It never dries out and can re-hydrate for its entire life. Cost = 12.00 for 50 pound bag, enough to seal about 50 holes.
Eric
Nice, thanks for the info. I think it was $12 a tube for the 2 part epoxy and it was basically toast after one job. I guess the only other questions would be regarding heat transfer. I understand how the properties of bentonite would create a water tight seal but would you get a significant amount of heat transfer from the inside of the house to out during the heating season? Is there something else providing a thermal barrier or is it fine as is?
Sorry for derailing this thread slightly.
Cheers
I do not feel that heat transfer would be an issue, it is just goop. I would expect it to have the same transfer rate as the concrete we are sealing.
Technical note: my zone is not Nova Scotia! When I was there in the late 70's in August, I had to go to the store and get more clothes! I was freezing. lol
Eric
I don't know anything on the topic, but it sounds like an interesting subject that I'm going to actively research and find out more about. I think that it would be an interesting and ground breaking development in the industry. I'm still learning and working on my degree for HVAC/R, but this is something that I would like to see come into being.
nothing talked about here is ground breaking....it has all been done many time before.