Bathroom Silicone Sealant - no mold

Skiddley · 16 Aug 2016 at 14:57

Guys,

There was a thread a while back where a few people recommended a white silicone sealant product that categorically does not go moldy. Searched, but could not find.

I'm sick of re-sealing our shower every year due to mold patches. This is the last time I want to do it.

Does anyone remember?

For reference, I've used Uni-bond Anti-Mold stuff so far, but any areas where water can pool, go moldy.

DXP55 · 16 Aug 2016 at 15:28

I think it was this

http://www.toolstation.com/search?searchstr=63890 16264 20214

Skiddley · 16 Aug 2016 at 15:31

DXP55 said:
I think it was this

http://www.toolstation.com/search?searchstr=63890 16264 20214

Awesome. 10 years! I'll give it a go and update in 2026

Mark M · 16 Aug 2016 at 15:39

I may be talking out of my rear here but I think a lot of the mould issues with silicon is down to the application of it as the water can get under the edge of it and never dries out. Could be wrong though but thats what it looks like on mine!

Molep · 16 Aug 2016 at 17:07

I've used the white version of this and so far seems great - just don't lick your finger and smooth it out.

thezappa · 16 Aug 2016 at 17:51

Use washing up liquid on your finger or use a Fugi Kit.

iraiguana · 16 Aug 2016 at 20:13

Use window cleaner for a non stick application. Also avoids introducing water into the sealant.

JAMAL · 16 Aug 2016 at 21:40

Dow Corning 785, 2 years here and no mould at all, great stuff.

Simps · 17 Aug 2016 at 00:23

JAMAL said:
Dow Corning 785, 2 years here and no mould at all, great stuff.

Dow Corning is good stuff. 3 years and no mould here too

Skiddley · 17 Aug 2016 at 10:54

Bought it, will re-seal over weekend. Saw Dow in Wickes, will try that next if this doesn't work.

Agreed on application being key. Will ensure old spores removed, and area clean\dry.

boxman2000 · 17 Aug 2016 at 12:16

Molep said:
I've used the white version of this and so far seems great - just don't lick your finger and smooth it out.

Always lick my finger to smooth out silicone. Wipe it with rag each time though.

Have Dow Corning 785 in my bathroom and also skirting/tile joins on entire ground floor. Brilliant stuff.

Telecaster · 21 Aug 2016 at 17:17

Dow Corning here as well, had to re-do the shower less than a year after a trade install, went on nice and looks spot on. Couple of quid from screwfix I think, can't really go wrong.

Lumeycom · 21 Aug 2016 at 17:19

Another vote for Dow Corning stuff, not much more expensive but lasts forever.

LiGhTfasT · 21 Aug 2016 at 23:13

The dow stuff has lasted a good few years here too and still looks great.

Nedved11 · 22 Aug 2016 at 22:29

Dow Corning always. However application plays a big part. Any slight ripple or bobbly bits will attract water to ingress and form mould. The angle of the bead is also important. After doing a few you get the nack of it.

Mark A · 23 Aug 2016 at 22:24

Application helps, but no amount of prep will stop mould forming on rubbish silicones. The forever white stuff seems to be very good, its stayed mould free in my bathroom where 3 different types of anti fungal silicones failed before it. I'm guessing the Dow corning silicone is a similar product with a decent anti fungal added.

Them fugi kits seem to be great. Probably your best bet to make sure you have done everything possible to avoid mould forming. The fugi should give a nice clean edge so water cant sit, unlike using tape which will always allow a little ridge to form where the silicon bead joins the bath/tiles. Or using your finger which will make a very fine edge which could fray and allow water to get under.