Included in this guide:
Owning the best bathroom sealant is an important step to ensure your bathroom remains fresh, dry and clean.
Bath and shower rooms are subject to wet and humid conditions, so to prevent water damage and the growth of mould, you need to apply a suitable sealant around your sanitaryware, including sinks, baths and shower trays.
It is best to use silicone sealant in your bathroom. While caulk is a popular method of sealing for walls it is not the best option for bathrooms as it is not completely waterproof.
These are the best bathroom sealants for the job which are available now.
(MORE: Bathroom design)
Best Bathroom Sealants
1. UniBond Anti-Mould Sealant
The best bathroom sealant overall
Size: 300ml | Colours: White or Ivory | Waterproof: Yes
UniBond’s Anti-Mould sealant is a top pick for any household, especially if your primary focus is ensuring long-lasting protection.
Its high adhesion formula helps to create a durable result that will stay consistent, and once applied, it forms a permanently flexible and waterproof seal, which reduces the chances of the seal breaking.
UniBond's anti-mould formula is optimal for use in warm in humid environments (including kitchens), helping to quickly seal around your bath, toilet or kitchen sink and look professional again — remarkably, it is touch dry in just 20 minutes.
The attached sealant gun makes it easy to use, and an integrated resealable cap is handy so you can do little bits at a time without worrying about the product drying out.
2. Everflex 500 Bath & Sanitary Silicone
A versatile all-rounder
Sizes: 295ml, 310ml | Colours: White, Ivory, Translucent, Sandstone, Manhattan Grey | Waterproof: Yes
A close second-place, Everbuild's Everflex 500 anti-mould sealant is a great model, and efficient across several fronts.
Long-lasting protection? Check. It incorporates a powerful fungicide into the formula, providing long-lasting protection against mould growth.
Dries quickly? Check. A skin will form within 10 minutes after application, then you'll need to wait around an hour for it to be tack free, and roughly 24 hours for it to be completely dry.
Moreover, it is hygiene and sanitary safe, and is specifically designed to seal and protect areas where maximum hygiene protection is required. It's also available in five different colours.
3. Gorilla Glue Mould Resistant Sealant
Water-ready within 30 minutes
Size: 80ml | Colours: Clear | Waterproof: Yes
One of the best bathroom sealants for quick drying — once applied, the versatile Gorilla Glue Mould Resistant Sealant is water-ready within 30 minutes, the fastest water-ready dry time on this list.
It's mould resistant too, can be used on all surfaces, and comes with a lifetime guarantee that it will not lead to cracks or shrinks.
What's more, it comes with a reusable nozzle making it very easy to apply. Although it only comes in 80ml bottles, so you'll need to buy in bulk for larger sealant jobs.
4. Dowsil 785 Sanitary Sealant
The plumbers' favourite still going strong
Size: 310ml | Colour: White | Waterproof: Yes
This product from Dowsil, formerly known as Dow Corning, has been around for many years, and it remains of the most popular sealants on the market.
The 785 Sanitary Sealant is a leading product which is particularly popular among plumbers. It utilises a fungicide formula that resists mould to keep your bathroom looking and smelling fresh, and it also protects against bacteria growth, MRSA, E. Coli and salmonella.
It dries quickly too — it should be tack free in under one hour.
5. Forever Clear Anti-Mould Bathroom Sealant
An under the radar pick, which boasts impressive results
Sizes: 80mm squeeze tube, or 295ml tube | Colours: White, Ivory, Grey or Clear | Waterproof: Yes
The Forever Clear’s patented Mould Shield is this sealant's main highlight, which actively prevents the growth of mildew, mould and bacteria.
It can be touch dry within 15 minutes of application thanks to its high-quality drying formula, plus it includes an anti-bacterial additive which helps to combat against new germs.
It may not be among the most well-known sealants, but it is effective in high humidity areas and more than justifies its place in this list.
6. 151 Silicone Sealant
A budget option for smaller jobs
Sizes: 70g | Colours: Clear, White | Waterproof: Yes
The 151 Silicone Sealant is a good option if you only need a small amount of sealant for small bathroom jobs, such as repairing tiles. Of course, if you need a little more, it's also available in a pack of six.
It's not as long-lasting as others on this list. But It's affordable, easy to apply, and includes a screw-on applicator nozzle so you don't need a gun for application. It's also available in two different colour options.
How to Choose the Best Bathroom Sealant
Without a bathroom sealant, you risk exposing areas of your bathroom to moisture, which can lead to the growth of mould and water damage.
It's an important purchase to make, so bear some of these key qualities in mind when buying:
Your bathroom sealant needs to protect against mould. If it isn’t, you may end up regularly replacing your sealant and beginning the whole process again.
The majority of reputable bathroom sealants will completely dry within a hour.
More Best Buys for Bathroom Jobs
Jack is News Editor for Homebuilding & Renovating, and strives to break the most relevant and beneficial stories for self builders, extenders and renovators, including the latest news on the construction materials shortage and planning reforms. Having bought his first home in 2013, he and his wife have renovated almost every room and recently finished a garden renovation.
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