Best Silicone Sealant - Dowsil 785 being applied

Silicone sealant is best for use in the bathroom, shower and around the bath. The best silicone sealant will protect your home from water damage caused by leaks and the build-up of mould or mildew. There are many different types of silicone sealants to choose from, but only the five best ones will be discussed in this blog post.

Are you looking for the best silicone sealant to protect your home from water damage?

Protecting your home from water damage caused by leaks and the build-up of mould or mildew can be a challenge.

When applying bathroom sealants, we recommend removing as much of the existing sealant as possible and using a sealant gun. You should also ensure that the area is completely dry and free from oil and other contaminants.

Which sealant should you choose, and is there a difference between bathroom sealant and shower sealant?

Before you reapply silicone sealant, make sure you remove all the old sealant. Check out our top tip for removing old sealant

Our top picks for Best Silicone Sealant

Top Pick
Dowsil 785 Sanitary Sealant

DOWSIL 785 Sanitary Acetoxy Silicone


The best silicone sealant for the bathroom, shower, shower trays and around the bath is DOWSIL 785 Sanitary Acetoxy Silicone.

This bestseller from DOW (Dow Corning) has been specifically designed to seal sanitary fittings to resist mould growth. It contains a fungicide that resists bacteria growth, MRSA, E. Coli and Salmonella, which can be common in bathrooms in a high humidity environment.

The finish is a high gloss and is resistant to ozone, ultra-violet radiation and temperature extremes, making it perfect for use in these environments.

Sanitary fittings such as baths, showers and sinks can be sealed quickly and easily with this silicone sealant which is mould resistant, anti-bacterial and copes well with temperature extremes.

The high gloss finish protects against ultraviolet radiation and ozone, making it our top pick and perfect for use as a bathroom sealant or shower sealant.

  • Best Bathroom Sealant
  • Protects against bacteria growth, MRSA, E. Coli and Salmonella
  • Resistant to mould growth
  • Improve the hygiene of your bathroom in a cost-effective way
  • Keep your family safe from harmful bacteria
  • Available in White, Beige, Clear, Grey and Jasmine

What customers are saying…

  • Cheaper than other big brand names and ten times better
  • I have found this to be the best silicone ever
  • Always happy with this product
  • Should be no other choice if using in bathrooms
  • very very good quality no air in the tube very good colour
  • Not used anything else in years. That says it all
  • This sealant has a nice smooth consistency but isn’t too thin
  • Brilliant stuff. Wouldn’t buy any other
  • Stays white and stays in place!
  • Make sure you have good ventilation as it does have a strong smell to it
  • I found this sealant slightly runnier than some to work with but it cures faster than many too
Combined Adhesive and Sealant
71q37UUx 3L. AC SL1500

Everbuild Stixall Extreme Power


Stixall is the seemingly impossible hybrid of silicone and polyurethane that has been designed to provide an amazing high-grab adhesive.

This primerless adhesive will bond glass, metals, plastic, concrete, plasterboard, polyester, Perspex, wood, enamel, painted surfaces and much more

The ideal bonding agent for most surfaces, you can use it in the kitchen and bathroom for both sticking items such as mirrors to walls and then sealing around the edges of showers, baths and sinks. It even works well in automotive situations!

This product can be overpainted if required, which is very unusual for a sealant and often a downside compared to caulk.

You will need a good quality applicator gun as Stixall is more viscous than most other products

  • Best Combined Adhesive and Sealant
  • Instant High Grab Adhesive
  • Interior and Exterior Use
  • It can be used even if surfaces are wet
  • Available in Black, White, Crystal Clear, Grey, Brown and Natural
  • Paintable

What customers are saying…

  • One of the best adhesives I have come across
  • Certainly for DIY home use, don’t look anywhere else
  • This is high quality flexible fixer and filler
  • This building adhesive and sealant doing very good job
  • The best quality product
  • I can easily recommend to anyone who will need it
  • Sorted my problem perfectly
  • It seems to have great stickiness and holds stuff in place really well
  • I strongly advise practice before attempting your job
  • OK, this is decent stuff, but a bit fiddly to use
  • Not easy to get started but once the adhesive is flowing it gets easier
  • Just make sure you can apply pressure for about an hour for the best results
  • I have been unable to get the adhesive to actually flow freely out of the nozzle
Best Clear Sealant
Gorilla All Conditions Sealant e1649450164186

Gorilla All Conditions Sealant


The best silicone sealant for your bathroom and shower is Gorilla All Conditions Sealant.

This product is fast-setting, can be exposed to water after just 30 minutes and will not yellow, shrink or crack over time. It also has many other features that make it the best option when considering bathroom or shower products including its ability to repel mould and mildew as well as being usable on a variety of surfaces.

For use on Porcelain, Metal, Vinyl, Laminate, Stone, Ceramic, Stainless Steel, Granite, Wood, Glass
Whether you are completing an indoor or outdoor project, Gorilla All Conditions Sealant is the best option and will provide long-lasting results.

  • Fast setting and can be exposed to water after just 30 minutes
  • Repels mould and mildew
  • For use on Porcelain, Metal, Vinyl, Laminate, Stone, Ceramic, Stainless Steel, Granite, Wood, Glass
  • Won’t yellow, shrink or crack over time
  • Perfect for both indoor and outdoor projects
  • Great for window and door frames
  • Has a lifetime guarantee

What customers are saying…

  • Product is great and Gorrilla products are the best
  • It’s been down 2 weeks now and no leaks yet
  • The best silicone sealant on the market
  • As expected for the brand, Super
  • Great silicone sealer, easy to apply with a silicone gun
  • Great stuff, very strong, no complaints
  • Worked so far
  • Highly recommended
  • Used to seal around the bath and worked fine
  • Great for grab and set and general water resistance
  • Easy to use and made a wonderful job of DIY project
  • It works well and stays good when resealed
  • Absolute stinks for days after use but works very well and is quite strong
  • Stick to no nails
  • It is very runny, be careful with excess pressure on the gun
Best for Bath
61Zh6Zc6aQL. AC SL1500

Unibond Triple Protection Anti-Mould Silicone Sealant


Tired of mould and mildew taking over the bathroom, kitchen or any other tiled area in your home? Unibond Anti Mould Sealant offers Triple Protection and might be just what you need. It is best for use in bathrooms, showers and kitchens due to its super anti-mould properties. This sealant also repels water and is flexible and durable, making it ideal for challenging conditions. Plus, it dries quickly so you can get on with your day!

So, if you are looking for a very good quality sealant that is mould resistant, so will prevent mould growth, be a durable sealant and provide a tight seal where it is needed most for sealing showers and wet rooms this is better than most bathroom sealants.

  • Best bath sealant
  • Repels water and prevents mould
  • Flexible and durable – ideal for challenging conditions
  • Dries quickly so you can get on with your day!
  • Keep your bathroom, shower and kitchen in pristine condition
  • Stop mould from taking over your home

What customers are saying…

  • Any mistakes can be easily wiped off and re-applied. I’m so impressed with this, if it’s also as anti-mould as it’s supposed to be, it won’t need re-doing for years!
  • A good quality silicone
  • Sticky stuff! If you plan on using this for the first time like I did, keep a roll of kitchen towel with you at all times
  • easy to use. 2 months on, no mould so far
  • Had to buy it because most of the sealant in my bath got covered in black mould. It was easy to use this one and after almost half a year – no signs of mould growth so far
  • What can I say…. It’s nice and white and makes the shower tray look new again
  • I must say that this is excellent in terms of resistance to mold but the adhesive strength is not at its best. Anyway it remains an excellent product
  • Used this to seal around my bath – it worked fine as expected but I would say it took closer to 48hrs to be totally dry
  • This stuff is very sticky and gets everywhere if you don’t watch out!!!
  • Don’t expect it to be mold resistant forever. Seems like it gets moldy within 18 months
  • Even after waiting twice as long as per instructions it was a little bit sticky
Quick Cure
Everflex Premium 500 e1649450040785

Everflex Premium+ 500 Bath & Sanitary Silicone


If you’re looking for the best bathroom sealants for around your bath and shower trays, look no further than Everflex Premium+ 500 Bath & Sanitary Silicone. This sealant is perfect for high humidity areas such as bathrooms, toilets, showers and kitchens, and its permanently flexible design ensures a waterproof seal that’s quick-curing and low dirt pick-up.

Plus, it won’t discolour on ageing even in humid or damp conditions, making it a great choice for any bathroom or shower.

  • Perfect for high humidity areas such as bathrooms, toilets, showers and kitchens
  • Contains a high level of powerful anti-fungal compound to protect the sealant
  • Permanently flexible
  • Waterproof seal
  • Quick-curing – low dirt pick up
  • Will not discolour on ageing even in humid or damp conditions
  • Keep your bathroom and shower looking great for years to come

What customers are saying…

  • Good product at a good price
  • Smells of vinegar, which is part of the formulation/curing process
  • Needed to reseal shower tray & sink and found it to be one of the best to use
  • Easy to use and happy with the finish
  • Did the job great
  • Good value and quality
  • Ok compared to other brands, once cured it is soft and flexible
  • Finish is a bit shiny
  • Smaller than average but just enough for needs
  • Goes off in the tube relatively quickly
  • Not anti-mold
  • Finishing not very good


When it comes to choosing the best silicone sealant for your bathroom and shower, it is important to consider all of the features and benefits of each product. Every product on our list is a good silicone sealant and should be considered.

Consider each product’s features and benefits to make the best decision for your needs. You will want a product that:

  • It keeps your bathroom and shower looking great for years to come
  • Enjoy a waterproof seal that will keep your bathroom and shower looking newer for longer
  • Is a suitable sealant for use around your bathroom suite, shower rooms, and shower tray and gives a smooth finish that inhibits bacterial growth and has anti mould protection
  • It stops water damage before it starts
  • It is completely waterproof and gives long-lasting protection


What are the pros and cons of silicone?


  • Silicone is highly elastic, and any movement in the joint should be tolerated
  • Silicone will adhere well to any smooth surface
  • Because of its elasticity, silicone won’t tear and can provide a rubber seal which is why it’s better than acrylic caulk and better for larger joints.
  • Silicone is ideal for rooms with higher moisture levels as it is water-resistant and can be anti-mould
  • Ideal for sealing around baths, sealing showers and other sanitary ware
  • It’s cold and heat resistant
  • Silicone is available in different colours, including white, clear, black, grey
  • You should use sanitary silicone in bathrooms which contains a fungicide to prevent mould


  • You can’t paint over silicone
  • When it’s dry, you can’t apply another layer on top

Which is the best sealant for showers?

Dowsil 785 Sanitary Sealant

The best sealant for showers is DOWSIL 785 bathroom sealant.

This product provides a watertight, flexible seal, cures quickly, and is UV-resistant is an anti-mould sealant & mildew-resistant. Different best sealants for the bathroom or shower will have different features, so it’s important to consider this when making your purchase.

What is the best bath sealant?

Dowsil 785 Sanitary Sealant

DOWSIL 785 is the best bath sealant.

Is silicone or caulk better for showers?

Silicone is better for shower rooms and bathrooms in general as it tolerates moisture much better than caulk

How do you seal the bottom of a shower?

The best way to seal the bottom of a shower is with silicone. This product provides a watertight flexible seal, cures quickly, and is mould & mildew-resistant.

What is the best silicone sealant for bathrooms?

The best silicone sealant for bathrooms is DOWSIL 785. This product is made from high-performance acetoxy silicone with anti-fungal properties, cures quickly and provides a tack free, completely waterproof seal.

How long should shower sealant last?

A silicone sealant should last anywhere from two to five years, but each application will vary.

What is the best caulking to use around a bathtub?

We recommend using silicone sealant around bathtubs as it is waterproof and mould resistant whereas caulk is not

How long should sealant last around a bath?

A silicone sealant should last anywhere from two to five years, but each application will vary.

Should I fill a bath before sealing?

Yes, the bath should be half-filled with water before you apply bathroom sealant with a caulking gun around the edges of the bath as the weight of the water will enlarge any gaps. When the sealant is cured, the bath can be emptied and gaps will compress. If the sealant was applied with the bath empty the weight of the bather would pull the sealant and over time the sealant might come unstuck.

How do I remove black mould from silicone sealant?

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