---
product_id: 49909820
title: "Otto Seal S 100, Sanitary Silicone, White, 300 ml"
brand: "ottoseal"
price: "€ 32.48"
currency: EUR
in_stock: true
reviews_count: 2
category: "Ottoseal"
url: https://www.desertcart.it/products/49909820-otto-seal-s-100-sanitary-silicone-white-300-ml
store_origin: IT
region: Italy
---

# Water resistant seal UV & weather resistant 43.5 PSI tensile strength Otto Seal S 100, Sanitary Silicone, White, 300 ml

**Brand:** ottoseal
**Price:** € 32.48
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal like a pro, last like a legend!

## Quick Answers

- **What is this?** Otto Seal S 100, Sanitary Silicone, White, 300 ml by ottoseal
- **How much does it cost?** € 32.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/49909820-otto-seal-s-100-sanitary-silicone-white-300-ml)

## Best For

- ottoseal enthusiasts

## Why This Product

- Trusted ottoseal brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Premium Volume:** Generous 300 ml capacity ensures you have enough sealant for multiple projects without constant reordering.
- • **Unmatched Durability:** Engineered to withstand weathering, ageing, and UV exposure for long-lasting performance.
- • **Trusted Brand Quality:** Backed by OTTOSEAL’s reputation and 4.8-star rating from over 500 professionals and DIY enthusiasts.
- • **Waterproof Confidence:** Creates a reliable, water-resistant barrier ideal for sanitary and wet environments.
- • **Versatile Surface Compatibility:** Perfectly seals stainless steel, PVC, wood, tiles, sinks, and bathtubs with professional-grade adhesion.

## Overview

Otto Seal S 100 is a high-performance sanitary silicone sealant in a 300 ml tube, designed for professional and home use. It offers excellent resistance to weathering, UV rays, and water, making it ideal for sealing in wet and sanitary environments. Compatible with multiple surfaces including stainless steel, PVC, wood, and tiles, it delivers a strong 43.5 PSI tensile strength for durable, long-lasting seals. Despite its premium price, it’s favored by users seeking reliable, professional-grade results.

## Description

Shop Otto Seal S 100, Sanitary Silicone, White, 300 ml. Free delivery on eligible orders of £20 or more.

Review: A great sealer but expensive - 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.
Review: Avoid this mess - 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.

## Features

- Contains 2-Octyl-2H-isothiazol-3-on. May produce an allergic reaction.
- Safety data sheet available on request.
- Otto seal S100
- Volume: 300 ml
- Very good resistance to weathering, ageing and UV resistance
- Stainless steel, PVC, wood, and in sanitary areas
- Brand quality

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B009B6HL0Q |
| Best Sellers Rank | 145,840 in DIY & Tools ( See Top 100 in DIY & Tools ) 77 in Silicone Caulk |
| Brand | OTTOSEAL |
| Colour | White |
| Customer Reviews | 4.8 out of 5 stars 537 Reviews |
| Global Trade Identification Number | 04030574038570 |
| Item Form | Paste |
| Item Weight | 0.79 Pounds |
| Item form | Paste |
| Item weight | 0.79 Pounds |
| Liquid Volume | 300 Millilitres |
| Liquid volume | 300 Millilitres |
| Manufacturer | UNKWN |
| Material | Silicone |
| Surface Recommendation | tile,pipe,sink,bathtub |
| Surface recommendation | tile,pipe,sink,bathtub |
| Tensile Strength | 43.5 Pounds Per Square Inch |
| Unit Count | 300.0 millilitre(s) |
| Water Resistance Level | Water Resistant |

## Product Details

- **Colour:** White
- **Brand:** OTTOSEAL
- **Item weight:** 0.79 Pounds
- **Liquid volume:** 300 Millilitres
- **Item form:** Paste

## Images

![Otto Seal S 100, Sanitary Silicone, White, 300 ml - Image 1](https://m.media-amazon.com/images/I/61f2zvJ2AUL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ A great sealer but expensive
*by P***R on 15 March 2025*

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.

### ⭐ Avoid this mess
*by V***D on 30 June 2025*

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.

## Frequently Bought Together

- Otto Seal S 100, Sanitary Silicone, White, 300 ml
- Joint Smoother Set 5 Pieces – Joint Scraper Set for Silicone and Acrylic
- Classic (Plus) Fugenfux® Set of 5 – Joint Smoother | Joint Puller with Revolutionary Magic Tip for Extremely Tight Areas | 5 Optimised Special Joint Heads | Made in Germany | For All Sealants

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**Shop now:** [https://www.desertcart.it/products/49909820-otto-seal-s-100-sanitary-silicone-white-300-ml](https://www.desertcart.it/products/49909820-otto-seal-s-100-sanitary-silicone-white-300-ml)

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-27*