The Best Bathroom Sealant in 2023

The Best Bathroom Sealant in 2023

Getting a good bathroom sealant is a crucial part of ensuring that your bathroom looks pristine, clean and is mould-free. Our bathrooms are exposed to mould on a daily basis because of our constant water usage; that’s why it is absolutely essential to use a sealant throughout your bathroom (on your sinks, baths, shower trays etc).

While caulking is a fairly popular method for sealing walls; it is not entirely waterproof. And it is for this reason that it would be best to use a silicone sealant in your bathroom. Now, choosing a suitable sealant can be difficult for those who have never done so before. Therefore, here are some of the best bathroom sealants that are available right now!

Our Best Bathroom Sealant Picks

1) UniBond Anti-Mould White Waterproof Sealant

UniBond Anti-Mould White Waterproof Sealant

Our best pick is the UniBond Anti-Mould White Quick Drying Waterproof sealant. It is perfect for those looking for a good sealant that will provide long-term protection. Its formula is ideal for those areas that are very warm and humid, like bathrooms and showers. What makes this product unique is its adhesion formula that helps create a long-lasting result.

Once your UniBond Anti-Mould is applied, it makes a flexible and waterproof seal, which will reduce the chances of the seal breaking, making this one of the best anti mould sealant options out there. What’s even better about it is that it is entirely user-friendly; once the sealant is applied (with a sealant gun), the silicone seal will be touch-dry in about 20 minutes and completely dry in 24 hours.

Key Features

  • Great for use in warm, humid environments
  • Long-lasting with high adhesion
  • Touch dry in just 20 mins
  • Fully dry in around 24 hours
  • One cartridge lasts for 1 x bath, 2 x showers & 2 x sinks

2) Everbuild Everflex 500 Anti-Fungal Bathroom Silicone Sealant

Everbuild Everflex 500 Anti-Fungal Bathroom Silicone Sealant

In second place, we have the Everbuild Everflex silicone sealant. This product is perfect for showers and bathrooms, and with its fantastic fungicide formula, it will provide solid and long-lasting protection from mould on the sealant itself. The waterproof formula makes it perfect for baths, showers, and basins and in my opinion is one of the best silicone sealants available.

If you need a quick dry sealant, then the Everbuild Everflex sealant is ideal for you; in the first 10 minutes after application, you can notice a skin form; after about an hour, the product will be touch-dry and completely dry in 24 hours. What’s even better about this product is that it comes in five different colours.

Key Features

  • Fungicide formula protects from mould
  • Offers long-lasting protection
  • Dries very quickly
  • Available in five different colours

3) UniBond Triple Mould Protection Bathroom Sealant

UniBond Triple Mould Protection Bathroom Sealant

The UniBond Triple Mould Protection Bathroom sealant formula kills, repels, and prevents mould growth wherever it is applied. This sealant is long-lasting; not only is it waterproof, but it also offers flexibility, being ideal for challenging surfaces. Just like most UniBond sealants, it is quick-drying; once applied, it will be touch-dry in 20 minutes and completely dry in 24 hours. This sealant is ideal for showers, bathrooms, baths, toilets, wet rooms and tiled areas (can be used for grouting).

Key Features

  • Long-lasting with high adhesion
  • Touch dry in just 20 mins
  • Fully dry in around 24 hours
  • Triple protection formula kills, repels, and prevents mould growth

4) Gorilla Clear Mould Resistant Bathroom & Shower Sealant

Gorilla Clear Mould Resistant Sealant

This Clear Mould Resistant Sealant by Gorilla is 100% waterproof and can be exposed to water even after 30 minutes after application. This is one of the fastest drying formulas on the market. Furthermore, this all-purpose sealant is perfect for wet and mouldy surfaces like baths, sinks, toilets, windows, doors, etc. The product has a shrink and crack-proof formula which prevents any mould growth from occurring. Many customers prefer the smaller size as most of the time sealant is only available in a big cartridge, so if you have a smaller job you will have to store or throw away the leftover sealant and gun. 

Key Features

  • One of the quickest drying formulas available
  • Suitable for touch-ups
  • Comes with a reusable nozzle
  • Last for a long time

5) UniBond Go Seal Anti-Mould Bathroom Sealant

UniBond Go Seal Anti-Mould Bathroom Sealant

The UniBond Go Seal is specially formulated for sanitary sealing tasks in warm and humid areas, like sinks, baths, basins, and showers. This product has high adhesion, which makes it a very strong and durable sealant. There’s no sealant gun required to use this product, and the precision nozzle also ensures a mess-free and smooth application. Just like all UniBond products, this one offers anti-mould protection, repelling, killing and preventing mould ensuring your bathroom remains in pristine condition for a long time.

Key Features

  • Anti-mould sealant
  • Ready-to-use design
  • Handy Size
  • No sealant gun required

6) 151 Clear Waterproof Silicone Sealant

151 Clear Waterproof Silicone Sealant

Just like the sealant by Gorilla, the 151 Clear Waterproof Silicone Sealant is a fantastic option if you are looking for a product you can cover smaller areas with. If you need more of it you can order it in a pack of six for very cheap. This is an incredibly affordable product and doesn’t need a gun for application – it comes with a nozzle. This product is available in two different colours, clear and white. Many customers preferred the size for smaller tidy-up jobs and because it’s clear makes the finish look shiny and brand new.

Key Features

  • Easy to apply
  • Waterproof
  • Great for smaller jobs
  • Very inexpensive

7) Everbuild Showerproof Bathroom Silicone Sealant

Everbuild Showerproof Bathroom Silicone Sealant

With its powerful anti-fungal formula, Everbuild’s Showerproof sealant is excellent at protecting against the growth of bacteria, mildew, and mould that are usually found in wet and humid areas like our bathrooms. This product has a quick-drying formula; after application, the sealant seals in 15 minutes, and it will dry completely 24 hours after application at a depth of 2mm.

The product is available in two colours: white and clear. This product is perfect for baths, showers, basins, sinks, PVC trims, cladding, panels, etc. The Everbuild Showerproof silicone sealant has a long-lasting but flexible seal, which makes it perfect for the changing weights and temperatures bathroom appliances experience.

Key Features

  • Quick-drying formula
  • The anti-fungal formula prevents the growth of bacteria and mould
  • Available in two different colours
  • Very long-lasting

8) UniBond White Speed-Seal Bathroom Sealant

UniBond White Speed-Seal Bathroom Sealant

Last but certainly not least, we have the UniBond Speed-Seal sealant which has an amazing fast-drying effect; you reapply this sealant in just one hour. This unique formula makes it ideal for wet and humid areas such as bathrooms, showers, sinks, etc.

Like most bathroom sealants, it requires a sealant gun and can be exposed to water within just one hour after application. It will be thoroughly dried in around 24 hours. This product also creates a hygienic barrier, so you can rest assured that mould won’t be able to get through.

Key Features

  • Fast drying
  • The special formula creates a hygienic barrier
  • Can be exposed to water after one hour
  • Has a long-lasting effect

What is the best bathroom sealant?

After researching all the greatest bathroom sealants online, we have found that the best bathroom sealant was the UniBond Anti-Mould. This was because it was very popular online with over 14,000+ reviews, likely thanks to its anti-mould formula, high adhesion, quick-drying, as well as its ease of use. We looked at all the top retailers like Screwfix, Wilko, Toolstation, B&Q, Wickes, Homebase, etc to check their best shower sealer range and reviews.

Can you put new bathroom sealant over old sealant?

According to MyBuilder, it is recommended that you never apply a new sealant over an old one, as in most situations, the old sealant has split, or it’s fallen away, and therefore, the new sealant will not bond correctly to the original sealant. In addition, it will not look that great either, so best to remove the old sealant if possible – while also being careful not to damage the surrounding area.

How do I stop my bathroom sealant from leaking?

To prevent your sealant from leaking, make sure the area that you are applying the product to is dry and free of debris before application. Also, the old silicone sealant should be removed thoroughly before your next application, while also ensuring that you allow the sealant to properly dry before use (usually around 24 hours) otherwise it will not set correctly.

What is sanitary sealant?

A sanitary sealant is simply a sealant (whether shower or bathroom e.g.) that prevents water from entering, and typically also consists of fungicides, that will prevent fungus and bacterial growth in areas where the sealant is applied.

Does vinegar remove silicone sealant?

In some cases, rubbing vinegar over the silicone sealant might safely remove some of the silicone sealant away. This is because the vinegar works to soften the silicone enough so that it becomes easier to remove.

Does WD 40 remove silicone sealant?

WD40 is another product that surprising also works as a good silicone sealant remover, but it is essential that you remove all the WD40 from the surface where you plan on applying the silicone sealant afterwards because they react together.

How do you apply bathroom sealant?

To properly apply the bathroom sealant, you first need to cut the top of the sealant nozzle 2cm at a 45-degree angle to shape the silicone line. After that, run the silicone entirely on the surface; once the sealant is applied, wet your finger with a silicone wipe and run your finger over the applied area to create a smooth line.

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