Onoff Posted January 4, 2019 Share Posted January 4, 2019 Just looking for people's thoughts / experiences on the "best" white sanitary silicon. Forever White seems to come up a lot. Cheers. Link to comment Share on other sites More sharing options...
jamiehamy Posted January 4, 2019 Share Posted January 4, 2019 What's the difference between sanitary silicon and CT1? I'll never use anything else now, sets very solid and takes bleach like a hero! Do you want best look or function? Link to comment Share on other sites More sharing options...
Crofter Posted January 4, 2019 Share Posted January 4, 2019 I have it on excellent authority from our resident Welsh plumber that white CT1 goes yellow after a while- so for aesthetic reasons he suggests using clear CT1 with a white silicon over the top if necessary. Btw I used Forever White myself and am perfectly happy with it, but time will tell... 1 Link to comment Share on other sites More sharing options...
Onoff Posted January 4, 2019 Author Share Posted January 4, 2019 1 hour ago, jamiehamy said: What's the difference between sanitary silicon and CT1? I'll never use anything else now, sets very solid and takes bleach like a hero! Do you want best look or function? 43 minutes ago, Crofter said: I have it on excellent authority from our resident Welsh plumber that white CT1 goes yellow after a while- so for aesthetic reasons he suggests using clear CT1 with a white silicon over the top if necessary. Btw I used Forever White myself and am perfectly happy with it, but time will tell... I want least revisiting! I spoke to Kevin at C-Tec, the CT1 distributor who's been v.helpful on a number of queries. He said the "yellowing" of white CT1 is known but it comes off easy enough with a quick bleaching. Can't remember the exact reason beind the yellowing. Interesting about the bleach as here it suggests only a moderate resistance to chlorine: ct1_product_info_sheet_10-03-2015.pdf Link to comment Share on other sites More sharing options...
jamiehamy Posted January 4, 2019 Share Posted January 4, 2019 I was actually going to add that ours goes back to white with a spray of Flash with bleach. Barely needs scrubbed, but yes, it does yellow ever so slightly. Link to comment Share on other sites More sharing options...
Onoff Posted January 4, 2019 Author Share Posted January 4, 2019 5 minutes ago, jamiehamy said: I was actually going to add that ours goes back to white with a spray of Flash with bleach. Barely needs scrubbed, but yes, it does yellow ever so slightly. How quick does it go yellow between bleaching? Link to comment Share on other sites More sharing options...
jamiehamy Posted January 4, 2019 Share Posted January 4, 2019 A few months? Even then it's hard to notice. I'm referring to our shower tray, which gets daily use, other areas I have used have never been bleached and have been down for a year. I'll try get some pics tonight if my brain remembers! Link to comment Share on other sites More sharing options...
nod Posted January 4, 2019 Share Posted January 4, 2019 2 hours ago, Onoff said: Just looking for people's thoughts / experiences on the "best" white sanitary silicon. Forever White seems to come up a lot. Cheers. Only one FOREVER WHITE Does what it says on the tin (Tube) Link to comment Share on other sites More sharing options...
Ed Davies Posted January 4, 2019 Share Posted January 4, 2019 For anybody who cares, it's: Silicone: the rubbery stuff. Silicon: the hard crystalline semiconducting element. Silicone is made up of silicon, oxygen and other chemicals in much the way rubber is made of carbon, oxygen and other chemicals. Sand is also made up of mostly silicon and oxygen though with less other chemicals and in a rather different structure. So it's silicon chips but silicone tits. A few years ago I bought some 3M “silicone carbide” sandpaper from a box store. Only noticed when I got home but happened to have a beer that evening with a recently retired fairly senior 3M manager so mentioned this, wondering if it was counterfeit or whatever. He popped off an email to his ex-colleague, the head of consumer products, who checked up and found that, yes, embarrassingly 3M had got the spelling wrong themselves. 1 1 2 Link to comment Share on other sites More sharing options...
Onoff Posted January 4, 2019 Author Share Posted January 4, 2019 29 minutes ago, Ed Davies said: For anybody who cares, it's: You might struggle to find anyone who does! The generic term working with a bunch Kiwis was "sealastic" for anything that came out of tube like this. Link to comment Share on other sites More sharing options...
Nickfromwales Posted January 4, 2019 Share Posted January 4, 2019 I don’t use CT1 for final / cosmetic sealing because IT IS AN ABSOLUTE FECKING PIG to work with. It really is horrible. Great for purpose, but just SO much hard work getting anything less than a small bead. Silicone is great for cosmetic stuff, and is easily removed when tired so can be redone with ease. Try that with CT1 at your peril. Anything with microban in it for ‘no black crap’ is a winner. Silicone cleans up easily too and is quite a bit cheaper. 1 Link to comment Share on other sites More sharing options...
Oz07 Posted January 4, 2019 Share Posted January 4, 2019 11 hours ago, Ed Davies said: For anybody who cares, it's: Silicone: the rubbery stuff. Silicon: the hard crystalline semiconducting element. Silicone is made up of silicon, oxygen and other chemicals in much the way rubber is made of carbon, oxygen and other chemicals. Sand is also made up of mostly silicon and oxygen though with less other chemicals and in a rather different structure. So it's silicon chips but silicone tits. A few years ago I bought some 3M “silicone carbide” sandpaper from a box store. Only noticed when I got home but happened to have a beer that evening with a recently retired fairly senior 3M manager so mentioned this, wondering if it was counterfeit or whatever. He popped off an email to his ex-colleague, the head of consumer products, who checked up and found that, yes, embarrassingly 3M had got the spelling wrong themselves. My god how the other half live! Link to comment Share on other sites More sharing options...
Onoff Posted January 4, 2019 Author Share Posted January 4, 2019 30 minutes ago, Oz07 said: My god how the other half live! Surely silicon carbide would be... ...roughing it! 1 Link to comment Share on other sites More sharing options...
TheMitchells Posted February 2, 2019 Share Posted February 2, 2019 On 04/01/2019 at 07:22, Crofter said: I have it on excellent authority from our resident Welsh plumber that white CT1 goes yellow after a while- so for aesthetic reasons he suggests using clear CT1 with a white silicon over the top if necessary. Our CT1 went yellow after a few months so I was a little disappointed. I shall try a bit of bleach on it to see if it improves. We are starting to renovate the en-suite so will try out the Forever White stuff. Link to comment Share on other sites More sharing options...
Onoff Posted February 2, 2019 Author Share Posted February 2, 2019 Forever White stinks and gives me a headache! Done the bath end & sides but think I might go over it again as a bit low. They were quite deep joints though. Link to comment Share on other sites More sharing options...
Adsibob Posted January 8 Share Posted January 8 On 04/01/2019 at 20:48, Nickfromwales said: I don’t use CT1 for final / cosmetic sealing because IT IS AN ABSOLUTE FECKING PIG to work with. It really is horrible. Great for purpose, but just SO much hard work getting anything less than a small bead. Silicone is great for cosmetic stuff, and is easily removed when tired so can be redone with ease. Try that with CT1 at your peril. Anything with microban in it for ‘no black crap’ is a winner. Silicone cleans up easily too and is quite a bit cheaper. I was going to use CT1 Clear to seal some potential sources of water ingress at the top of a parapet wall and also a small gap between some brickwork and and a window frame. I'm a complete novice working when it comes to working with these types of materials, so I thought clear would be better as it would hide my messiness better, and I can use the same product in multiple areas, rather than get different colours. But your comment @Nickfromwales concerns me slightly. Is it that hard to work with CT1? Other concern is whether the CT1 will cure quickly enough. Temperatures are not very high at the moment, even in the South. Link to comment Share on other sites More sharing options...
Onoff Posted January 8 Author Share Posted January 8 CT1 needs to be applied 5degC. Dow do some low temperature silicones from memory for use in fridges etc. Link to comment Share on other sites More sharing options...
joe90 Posted January 8 Share Posted January 8 I used black CT1 recently in cold conditions, I didn’t find it difficult to use but sticks like sh1t to anything (including skin and difficult to remove, I used foam gun cleaner ). So don’t be over enthusiastic with it, I do get the theory about clear being better (as you can’t see cock ups ). Link to comment Share on other sites More sharing options...
Adsibob Posted January 8 Share Posted January 8 Can I cure it with a hairdryer? Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted January 8 Share Posted January 8 On 04/01/2019 at 07:22, Crofter said: I have it on excellent authority from our resident Welsh plumber that white CT1 goes yellow after a while- so for aesthetic reasons he suggests using clear CT1 with a white silicon over the top if necessary. Btw I used Forever White myself and am perfectly happy with it, but time will tell... yeah I found this too, very annoying. Everbuild Stixall is a good swap out and is bang on! That’s my recommendation, it’s a hybrid adhesive/sealant and is overpaintable should you need to Link to comment Share on other sites More sharing options...
MortarThePoint Posted October 26 Share Posted October 26 Back to bathrooms and the like, which is better Acetoxy (stinky vinegar) or Neutral cure? I'm considering these two: Dow 785+ Bacteria-Resistant Sanitary Silicone White 310ml (58308) Dow 785N Sanitary Sealant White 310ml (800FG) Both have fungicide, 1 Link to comment Share on other sites More sharing options...
Nick Laslett Posted October 26 Share Posted October 26 (edited) @MortarThePoint not done much silicone yet, just the plant room where I used Mapesil AC acetic silicone sealant for sealing between floor tile and wall. https://www.mapei.com/gb/en/products-and-solutions/products/detail/mapesil-ac Only been down for a couple of weeks, but was happy with the tooling of the silicone and the final finish. My experience with the hybrid MS polymer products like CT1 or OB1 is that it is very difficult to get a good finish. I did try Sika EBT+ to seal the bath in my rental property, I would not recommend EBT+ for this purpose. The main difference between the two DOW products is the 785N is suitable for natural stone materials and won’t stain them. Mapei has the same distinction between there two silicone sealants. Edited October 26 by Nick Laslett Link to comment Share on other sites More sharing options...
MortarThePoint Posted October 31 Share Posted October 31 On 26/10/2024 at 17:36, MortarThePoint said: which is better Acetoxy (stinky vinegar) or Neutral cure? Here's a good comparison and Neutral Cure appears better for my needs. Link to comment Share on other sites More sharing options...
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