Otto Seal S 100, Sanitary Silicone, White, 300 ml

The sealer works very well indeed, I used it first on a Twusch fitting to my Thetford Toilet, but I will continue to use it elsewhere, but it is expensive compared to the ordinary sealer from a local hardware store. Is it worth it? I'm not sure, but it is very easy to use and, hopefully, will last a long time.

Unless you have 10 years of hands-on experience applying silicone for 10 hours a day, I strongly recommend staying away from this product. It’s incredibly thick, and applying it evenly or neatly is nearly impossible. It will stick to everything it shouldn’t — and almost certainly won’t stick where it’s actually needed. I don’t question the skills of the engineers behind this formula, but they clearly need to sit down with their marketing team. Because before you can appreciate the supposed quality of this product, you have to somehow manage to apply it correctly — and that’s just not going to happen without a five-hour instructional video (which, by the way, doesn’t exist). And here’s the cherry on top: for your £18, they don’t even bother including a nozzle. Apparently, it’s so “premium” you’re expected to go buy one separately.