So, first of all, neither 100% silicone 1 or 2 have added mold resistant chemicals. The difference is the curing process. Silicone 2 has a solvent in it that causes a different type of cure.
Anyways, the only options you really have is to either add some more silicone real thin in the areas and press more into those spots, color it some way, or out something else over it. I'd suggest the first option and just make it thin and push a bit into it.