Over in the States, there is a product by Drylok, called "Basement and Masonry Waterproofer". It is a latex based product. This product is completely inert when cured and is non toxic to aquatic and other life, and it is that property that I am specifically looking for - the non toxicity, even when constantly wet (from a water feature). I have searched high and low but this is so far outside my area of expertise that I could really use some help! Is there any product in the UK that is the same, or very similar, to this Drylok product?
I would be so grateful to hear back from anyone who could shed some light for me :)
Thanks, take care!