Can I use polyfilla for the surrounding of the shower basin,

>>1163543

No...use silicone, it's only 8-10$ a tube...

Polyfilla is for drywall repair and isn't waterproof/resistant...

>>1163543
I work as a builder and I just got done fixing where someone did exactly this. No. Don't do it. Just get silicone. you can shape it in place with a wet thumb and some care and it's cheap. Don't do this to yourself OP.

3M 5200 marine adhesive sealant is designed for through-hull boat use and makes all conventional RTV silicone shit by comparison. It has far better wetting and adhesion. Worth the money. I use it all the time indoors and outdoors.

Available at most hardware stores and online.

I have a related question, which is, How do you remove old silicone? I cant go in there with a knife or spatula, as usual, coz I dont wanna scratch the plastic.

>>1165000
razor blade

>>1165002

a razor blade sounds like a recipe for making multiple scratches, scrapings, and shavings.
isnt there some liquid that softens silicone for removal?

>>1165025
>isnt there some liquid that softens silicone for removal?

Yes. Cunningly named...Silicon Remover or Sealant Remover. It's a goop that you gun on, and it softens the sealant and you scrap up all the mess with a plastic scraper.

Thin layers of silicone are easy to remove; just push at it with your nail and it'll come away.

In general silicone really is a terrible material and barely adequate for its intended purpose, but we don't really have anything better.

>>1164980

Smoothing that with a wet finger sounds like a bad idea. Extreme wetting/adhesion is not necessarily a selling point either, you can put WD40 on silicone and pull it out.

It's still plastic, it will get nasty long before tile/etc.

>>1165000
Use a plastic sealant scraper, not metal.

https://www.google.com/search?q=aircraft+sealant+scrapers&source=lnms&tbm=isch&sa=X&ved=0ahUKEwikw6nBjLvTAhWBeCYKHXvLBHMQ_AUICSgC&biw=1276&bih=592