Sealant doesn't seem to be sealing.

[daneaston]

Hi all

I've just re-done our shower. New shower tray and new tiles. I've finished off with sealing around the bottom of the tiles and shower door, but the sealant has all lifted from the shower tray. I know it's leaking because about 5mins after running the shower a little bit, water was leaking onto the bathroom floor from under the shower door.

I used Unibond transluscent sealant and a Moretti shower tray from Screwfix. ANY help gratefully received!

http://www.diy.com/diy/jsp/bq/nav.j...<{9372100}/specificationsProductType=sealants

http://www.screwfix.com/p/moretti-shower-tray-square-805-x-805-x-45mm/47999

Read more: //www.diynot.com/forums/decorating/new-shower-sealant-not-sealing.294586/#2144600#ixzz1aZgwpLRZ

 

[Nige F]

You need a Neutral Curing Silicone - that will stick to plastic - sanitary ones are usually acetoxy ( smell of vinegar ) and that won`t stick to plastic .

 

[daneaston]

Could you recommend a specific product?

 

[gingerbear]

The answer is CT1 sealent ! without a showdow of doubt ! Trust me i'm a plummer . take off what you've done and start again, jobs a good un ! good luck ! onto next mission.

 

[seco services]

Trust me i'm a plummer .

God help us, you even have trouble spelling it.

 

[TicklyT]

A thorough clean of the tray, finishing with a final wipe down with isopropyl alcohol or methylated spirits helps.

Sometimes the remnants of a layer of release agent used in the moulding process remains on the surface of the shower tray. It's used to stop the tray sticking to the moulds in the factory.

Hardly anything will ever stick to that stuff, but a wipe down with alcohol dissolves the residue.

 

[daneaston]

Is white spirit the same as meths?

 

[Diyisfun]

Is white spirit the same as meths?

No...but it will do the same job

 

[Charnwood]

Plumbers Gold (or Plummers Gold )

Specially formulated for the plumbing professional, PLUMBERS GOLD is a new type of sealant and adhesive based on STPA* polymer technology that offers outstanding adhesion to all sanitary, bathroom, wetroom, kitchen and plumbing materials such as hard plastics, acrylics, fiberglass, ceramics, glass, marble, granite, aluminum, mirrors, metals etc.

PLUMBERS GOLD can be applied to wet surfaces, will even work underwater, and contains Microban

Made by Everbuild.

 

[wanleg]

I've used that Unibond stuff in the past and it didn't work well sealing my bath, same problem wouldn't stick. I have since always used Dow Corning 785, I swear by the stuff.

 

[daneaston]

So if this sealant sticks to anything, what's the importance of removing ALL the old sealant. And is it really all? Or 'as much as you realistically can'?

 

[wanleg]

So if this sealant sticks to anything, what's the importance of removing ALL the old sealant. And is it really all? Or 'as much as you realistically can'?

I guess because if you dont any new silicone will only be stuck to the old silicone which is coming away anyway and not to the plastic.

Try and remove as much as you can for the best seal.

 

[seco services]

I second dow corning.