Bert 27, 1l
This is an extremely concentrated, acid-based detergent for granite, ceramic or gres. It should only be used for strongly-resistant soiling or to eliminate rust or potassium nitrate. One of its great advantages is that it forms a layer of foam that does not drip when used on vertical surfaces, so it is especially useful for the deep cleaning of wall-tiles immediately after fixing.
Granite, ceramic, gres, unpolished marble
Cleaning stone after construction (cement removes deposits on the stone and partly rust).
Caution: Do not use on polished marble and limestone!