I have seen some tile guys wet their finger with saliva to smooth out a bead of silicone in a corner of a shower stall. does this minor wetness have any adverse affects on the surface layer of the silicone or its ability to cure properly?

  • I suspect that the saliva helps avoid having too much caulk stick to the skin of your finger.
    – DaveM
    Nov 1, 2022 at 21:24

3 Answers 3


It will not affect the curing of the silicone, but using a fine mist of denatured alcohol and smoothing out the caulk before the alcohol evaporates leaves a cleaner surface by removing all the residue from smoothing it out.


It does not. However, if using 100% silicone it forms a skin (drying) very quickly and you will begin to "pull" the product vs smooth out. Consider using rubbing alcohol in this case.


Yes it will cure properly.

Silicone is not water (or saliva) absorbent.

So it is only on the surface of the silicone.

  • actually, vinegar and spit mix pretty well...
    – dandavis
    Nov 1, 2022 at 15:51
  • I'm a bit lost, @dandavis, what does vinegar have to do with it?
    – FreeMan
    Nov 1, 2022 at 16:11
  • @FreeMan it's the solvent used on silicon caulk; acetic acid,
    – dandavis
    Nov 1, 2022 at 16:33

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