Thanks for calling. Ya I googled this issue months ago and I saw a post somewhere that the guy called GE also. He got the answer that bioseal is in 1 also and has been used in there fir over 10 years. It's a marketing ploy, he said it was a legal isue also, as GE silicone was used in all tanks and the parent company to the existing aquarium silcone used on industrial level. It's a great debate, I used it cuz nothing else availibe within 60 miles