How should I tackle this please

Emmia

WIAWSNB said:

billiepiper14 said:

So is the CT1 suitable please ? I opened it some months ago to do a few jobs, so I can’t swap it. I can certainly buy a tool though, if this stuff is up to the job. Thanks so much for the helpful replies 

What I would do is buy the tools first. Then either find a suitable test area - which would be where two flats surfaces meet at a right angle, or just a short length of your shower, and try it out.
Squeeze out a pencil-sized bead along the joint, say a foot long, and then run the tool along it, pressing to make good, firm contact with both surfaces, but not pressing hard. See how it works. 
The tool will have the excess sealant built up on it - how easy is it to wipe off? The finished bead should be a neat and crisp bevel - is it? And - importantly - there shouldn't be any remaining smears of sealant on either surface - is there?
If that test works, go for it. 
First, of course, all traces of the existing sealant needs removing, and the surfaces made clean and dry.

I would also consider how easy it would be to remove the stuff you have, in the event it goes mouldy or for another reason. Silicone sealant is very easy to remove and replace if needed.

billiepiper14

Thankyou what’s best to clean in preparation ? Just washing up liquid liquid and water ?

billiepiper14

Also this one any good please ? https://www.toolstation.com/everflex-500-bath-sanitary-silicone/p85399?store=DF&utm_source=googleshopping&utm_medium=feed&utm_campaign=googleshoppingfeed&gad_source=1&gad_campaignid=21016232523&gbraid=0AAAAAD-vLcWwRn46yBIeTsXhD2aA6L5eO&gclid=EAIaIQobChMI26LWsqiXjwMV3o1QBh11ABKiEAQYASABEgKG6vD_BwE

Emmia

billiepiper14 said:

Thankyou what’s best to clean in preparation ? Just washing up liquid liquid and water ?

I used white vinegar and white spirit last time I did mine to dissolve/soften the silicone - peeling off as much as I could before thoroughly cleaning the area with white vinegar/white spirit to remove residues

WIAWSNB

billiepiper14 said:

Thankyou what’s best to clean in preparation ? Just washing up liquid liquid and water ?

It'll need more than that.
The bulk of the sealant is 'cut' away, using a sharp blade slide along each flat surface, and slicing in to the sealant. 
Remaining traces should be scraped away by gentle use of a sharp edge, taking care not to scratch the surface. Then a firm wipe down, possibly requiring an abrasive cleaner like Jif.
Or, use a propriety remover.
I bet there's lots of YouTube vids showing the best technique.

Emmia

billiepiper14 said:

Also this one any good please ? https://www.toolstation.com/everflex-500-bath-sanitary-silicone/p85399?store=DF&utm_source=googleshopping&utm_medium=feed&utm_campaign=googleshoppingfeed&gad_source=1&gad_campaignid=21016232523&gbraid=0AAAAAD-vLcWwRn46yBIeTsXhD2aA6L5eO&gclid=EAIaIQobChMI26LWsqiXjwMV3o1QBh11ABKiEAQYASABEgKG6vD_BwE

Never used it, I used Dow last time, which I appreciate is twice the price but went on easily and no mould a year later (fingers crossed it stays like that)

Emmia

Emmia said:

WIAWSNB said:

billiepiper14 said:

So is the CT1 suitable please ? I opened it some months ago to do a few jobs, so I can’t swap it. I can certainly buy a tool though, if this stuff is up to the job. Thanks so much for the helpful replies 

What I would do is buy the tools first. Then either find a suitable test area - which would be where two flats surfaces meet at a right angle, or just a short length of your shower, and try it out.
Squeeze out a pencil-sized bead along the joint, say a foot long, and then run the tool along it, pressing to make good, firm contact with both surfaces, but not pressing hard. See how it works. 
The tool will have the excess sealant built up on it - how easy is it to wipe off? The finished bead should be a neat and crisp bevel - is it? And - importantly - there shouldn't be any remaining smears of sealant on either surface - is there?
If that test works, go for it. 
First, of course, all traces of the existing sealant needs removing, and the surfaces made clean and dry.

I would also consider how easy it would be to remove the stuff you have, in the event it goes mouldy or for another reason. Silicone sealant is very easy to remove and replace if needed.

If you use the stuff you have, I would consider testing on a spare bit of tile - squeeze a strip on, leave to set/dry fully, then try peeling it/ scraping it off.

billiepiper14

Thankyou. What’s Dow please ?

Emmia

billiepiper14 said:

Thankyou. What’s Dow please ?

This stuff I linked to in a previous post 

https://www.screwfix.com/p/dow-785n-sanitary-sealant-white-310ml/800fg

billiepiper14

Thankyou for this