"Does not work on silicone sealant"
22 February 2017
I purchased this having previously bought the spray on version which did not remove mound from silicone and had a spray which failed after 2 or three uses. I have some very minor black mould spots on the silicone sealant in our shower and hoped that leaving the gel on overnight would shift them - it did not. The gel is not as thick as I expected and drips everywhere, and after three applications has not touched the mould. This product may well work on grouting, but bleach would remove that anyway, but it does not work on silicone sealant.
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