Any chemical, even those found under the kitchen sink, may be harmful to animals. If you would not give it to your pet to drink, then do not make it accessible as they may lick their paws.
Always store bottles out of the reach of children and pets.
When applying these products to hard surfaces to treat growth such as moss, algae and lichen, then there will be no problem as long as you follow the instructions.
Contact cleaners, such as
Batifort and
Batiface, are designed to be washed away so make sure that the area is well rinsed and dry before letting animals, such as cats and dogs, back onto the surface.
Systemic cleaners such as
Baticlean CR take longer to act as they are absorbed by the growth which will die away over a few days. It is left on the surface without rinsing so do not allow your pet access until completely dry, preferably after 24 - 48 hours.