1 Mask off
In order to guide your hand and eye - and keep the 'worm' of sealant in a straight line - mask off above and below the area where the sealant is to be laid. Use a low-tack tape and run it in continuous strips where possible at each side of the fitting.
2 Apply the sealant
Cut the nozzle at 45 degrees - don't cut too much off the end of the nozzle or you'll get too thick a 'worm'. Using even pressure, squeeze the sealant from the tube (or use the cartridge gun or finger trigger). Work carefully along the join applying the sealant.
3 Remove masking tape
Smooth out any irregularities in the sealant with the back of a wet teaspoon, and remove the masking tape. Don't rip the tape off: remove it slowly and evenly so you don't pull the sealant away as well. Allow the sealant to dry thoroughly, according to the maker's instructions.
Removing Sealant
If old sealant round a bath or sink has become stained or discoloured, brush on a proprietary sealant remover, leave for 15 minutes, then scrape the old sealant off. Thoroughly clean the area then apply new sealant.
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