I just got two bags of thoroseal and just read I should use acryl-60. Does anyone know if this is really necessary or just marketing to selling another product.
It is for a pond which is made of of most rock and cinder blocks.
Check this thread at koi-bito. There is a good bit of info on that site about thoroseal.
Here is a link that might be useful: koi-bito
I decided to bite the bullet and go with the Acryl-60 as most people seemed to have positive results. I have started building a blog with the various stages which I will update. This blog is still WIP, but if people want to see the pictures.
Here is a link that might be useful: Concrete Pond
Wow! That's a big project you got going. I think it will look amazing when you're done!