Domestos Pro Formula thick bleach is the next generation of bleach with ANTI-LIMESCALE active molecules that stick even below the waterline to remove stains and prevent the buildup of limescale UP TO 3X LONGER *than before. Clings longer to the surface. Ideal for toilets, sinks waste areas and drains Exceptional long lasting germ kill. with C-TAC to thicken and allow it to cling longer to the surface. Ideal for toilets, sinks, waste areas and drains.