On materials that are generally sensitive to solvent cleaners, perform a test prior to application with a cloth on a limited area in order to see the compatibility of the base with the product and make a decision based on the test.
In the case where a test is performed on a porous base, (building blocks, bricks, sealants), if necessary soak the outside beforehand with water in order to reduce the prolongation of the product on the area to be cleaned and avoid the paint pigments penetrating more deeply than necessary. Allow the contact time required for cleaning the base but limiting its deterioration.
Protect the surrounding vegetation.
Base of alkaline detergent agent in aqueuse solution.