5 Best Silicone Sealants for a Perfect Waterproof Seal (2024 Guide)

by | Bathrooms

Originally published: May 21, 2024
Last Updated: September 7, 2024

Reading time: 11.47 minutes

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plumbinghub.info is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com, amazon.co.uk, amazon.ca or amazon.it.

When it comes to fighting the relentless tide of water and moisture, the right silicone sealant is your best defense. You’re aware that even the smallest leak can lead to significant problems, from unsightly mould to structural damage. As a professional, you understand that choosing a subpar sealant isn’t an option.

In 2024, the market has evolved, offering you advanced formulations and superior application technologies. This guide highlights the five best silicone sealants that promise a durable and flawless waterproof seal, each with unique features tailored for different environments and challenges.

As you weigh the pros and cons of these top contenders, you’ll find that making an informed decision is about more than just picking a product; it’s about ensuring the longevity and integrity of your work.

Stay with us as we unveil which silicone sealants stand out this year and why they deserve a spot in your toolkit.

Key Takeaways

  • UniBond Triple Protection Stop Mould Silicone Sealant is recommended for its mould and fungal resistance as well as its quick cure and dry time.
  • Everbuild Everflex 500 Bath and Sanitary Silicone, Anti-Fungal is a durable option that offers mould and fungal resistance.
  • EVO-STIK All Purpose Silicone Sealant is known for its longevity and durability, making it a reliable choice.
  • UniBond Anti-Mould White Waterproof Kitchen & Bathroom Sealant is user-friendly with easy application and offers mold and fungal resistance.

EVO-STIK All Purpose Silicone Sealant

flexible clear silicone sealant

If you’re looking to waterproof your home, EVO-STIK All Purpose Silicone Sealant offers a flexible, clear solution that’s perfect for both indoor and outdoor sealing needs. It’s highly resistant to weather, sunlight, and mould, ensuring long-lasting protection. With an impressive 25-year guarantee, this sealant promises durability and ease of maintenance.

With a 4.5 out of 5 stars rating from over 5,000 reviews, it’s clear that this sealant stands out as a reliable choice. It’s great for sealing everything from window frames to baths and sinks. Plus, there’s no need to worry about strong odors or messy applications.

EVO-STIK All Purpose Silicone Sealant

flexible clear silicone sealant

Best All Round Silicone Sealant

  • Comes with a 25-year guarantee, providing long-term peace of mind.
  • High resistance to weather, sunlight, and mould, enhancing its durability.
  • Versatile enough for both interior and exterior applications.

Best For: DIY enthusiasts and homeowners looking for a durable and flexible sealant for a wide range of sealing tasks.

UniBond Triple Protection Stop Mould Silicone Sealant (291 g Cartridge)

mould resistant silicone sealant cartridge

For homeowners battling mould, UniBond Triple Protection Stop Mould Silicone Sealant provides a clear, long-lasting barrier that repels, kills, and prevents the growth of mould in wet areas. This sealant’s Triple Protect formulation ensures your kitchens, bathrooms, and other moisture-prone areas stay free from unsightly and unhealthy mould. It’s a champion in coverage, able to seal around a bath twice, showers twice, and sinks twice from just one 291 g cartridge.

You’ll find it touch dry in 20 minutes and fully cured in 24 hours, making it a convenient choice for quick home improvements. With an impressive average rating of 4.6 out of 5 stars from over 5,000 reviews, users have confirmed its excellent adhesion and mould resistance. Say goodbye to mould worries with UniBond’s dependable sealant.

UniBond Triple Protection Stop Mould Silicone Sealant

mould resistant silicone sealant cartridge

Best for Mould Prevention

  • Features a triple protection formula that repels, kills, and prevents mould growth effectively.
  • Offers versatility with its suitability for various surfaces in kitchens and bathrooms.
  • Quick drying with a touch dry time of 20 minutes and fully cures within 24 hours for swift project completion.

Best For: Homeowners seeking a durable and effective solution for preventing mould in high-moisture areas such as bathrooms and kitchens.

UniBond Anti-Mould White Waterproof Kitchen & Bathroom Sealant

waterproof sealant for kitchens

Designed to withstand the moist conditions of kitchens and bathrooms, the UniBond Anti-Mould White Sealant provides a durable, mould-resistant solution that’s perfect for areas prone to humidity. Manufactured by Henkel Ltd, this product ensures high adhesion and longevity in warm, humid environments. You’ll find it easy to apply using a plastic sealant finishing tool, and with its flexible nature once dry, it’s a go-to option for a reliable waterproof seal.

With an impressive 4.6-star rating from over 20,000 reviews, it’s ranked highly in the DIY & Tools category. Remember, for optimal results, start with a clean, dry surface.

UniBond Anti-Mould White Waterproof Kitchen & Bathroom Sealant

waterproof sealant for kitchens
  • High adhesion and long-lasting in warm, humid environments.
  • Easy application with a plastic sealant finishing tool for a smooth finish.
  • Highly rated for its effectiveness with a 4.6-star rating from over 20,000 reviews.

Best For: DIY enthusiasts and homeowners looking for a reliable solution to combat mould and ensure a durable, waterproof seal in their kitchen and bathroom.

Everbuild Everflex 500 Bath and Sanitary Silicone, Anti-Fungal

anti fungal silicone for bathrooms

Professionals and DIY enthusiasts seeking a reliable solution for high-humidity areas will find Everbuild Everflex 500 Bath and Sanitary Silicone, with its anti-fungal properties and waterproof formula, an ideal choice. This product stands out due to its quick curing time and the availability in various colours, allowing you to match it perfectly with your bathroom or kitchen decor. Manufactured by Sika Everbuild, this silicone sealant is designed for both interior and exterior applications, ensuring a durable and mold-resistant seal.

With overwhelmingly positive customer reviews, the Everbuild Everflex 500 garners an average rating of 4.5 out of 5 stars from 8,903 ratings. Users praise its quality, ease of use, and value for money, although a few have noted issues with mold formation and finishing.

Everbuild Everflex 500 Bath and Sanitary Silicone

anti fungal silicone for bathrooms

Best Anti-Fungal Sealant

  • High resistance to mold with its certified anti-fungal properties
  • Versatile for both interior and exterior applications, enhancing its utility
  • Quick curing time and availability in multiple colours to match different decors

Best For: DIY enthusiasts and professionals looking for a robust, anti-fungal silicone sealant suitable for high-humidity environments.

Everbuild General Purpose Silicone Sealant, White, 280 ml

white silicone sealant 280ml

If you’re tackling moisture-prone areas in your home, Everbuild General Purpose Silicone Sealant offers a robust waterproof barrier that’s also mold-resistant, making it an ideal pick for kitchens and bathrooms. This white, versatile sealant packs anti-fungal ingredients to prevent mold growth and adheres well to PVCu trims, cladding, and panels. You’ll find it meets the stringent European standard EN15651 for sealants, ensuring quality and durability.

Applying it’s a breeze with a standard caulk, sealant, or adhesive cartridge application gun. The 280 ml cartridge, available in various colours, fits well with most applicator tools. Users commend its water resistance and finish, though some have noted a smell—which is typical for silicone sealants. Plus, it’s a great value for your money, according to satisfied customer reviews.

Everbuild General Purpose Silicone Sealant

white silicone sealant 280ml

Best General Purpose Sealant

  • Contains anti-fungal properties to prevent mold, enhancing the longevity of sealed areas.
  • Compliant with the European standard EN15651, ensuring a high-quality, durable seal.
  • Compatible with standard caulking guns and easy to apply for a smooth, professional finish.

Best For: DIY enthusiasts and homeowners looking for a reliable sealant for high-moisture areas such as kitchens and bathrooms.

Factors to Consider When Choosing a Silicone Sealant

When you’re picking a silicone sealant, it’s crucial to ensure it’s compatible with your project’s materials.

You’ll also want to check its resistance to elements like water and UV light, as well as how quickly it cures and dries.

Don’t forget to consider the colour and whether it needs to resist mold and fungus for long-term durability.

Application Compatibility

Before selecting a silicone sealant, you must consider the compatibility of the product with the materials and environmental conditions it’ll encounter. Check if the sealant suits the specific surfaces you’re working with, as some may not adhere to certain materials. You’ll also want to ensure it can withstand the environment it’s exposed to, whether that’s high humidity, extreme temperatures, or UV rays.

Look at the manufacturer’s guidelines to confirm whether it’s intended for indoor or outdoor use. This affects how well it will perform over time. If you plan to paint over the sealant, make sure it’s paintable to avoid any adherence issues.

Lastly, consider any special features like anti-mold or antibacterial properties that might be necessary for your project.

Resistance Qualities

Ensure your silicone sealant offers robust resistance to weather, UV exposure, and mold to maintain its effectiveness over time.

When choosing a sealant, it’s crucial to evaluate its ability to repel, kill, and prevent mould, particularly in high-humidity areas like your kitchen or bathroom. Opt for a product with anti-fungal properties to ward off mold growth in damp conditions.

Additionally, the waterproof formula is essential for safeguarding against water damage. Remember to assess the sealant’s resistance to mold and its suitability for high-humidity environments to ensure you’re getting long-lasting performance.

This way, you’ll avoid frequent reapplications and keep your surfaces protected and looking great for years to come.

Cure and Dry Time

Considering cure and dry times is critical when selecting a silicone sealant. These times dictate how quickly you can expose the sealed area to moisture and other environmental factors. Some sealants are touch dry in just 20 minutes and fully cured in 24 hours, which is perfect for jobs needing a swift turnaround. However, if you’re working under specific conditions or in high humidity, you’ll want a sealant with a longer cure time to ensure it’s fully set before facing the elements.

Always check the product’s specifications for cure and dry times to align with your project’s timeline and environmental exposure. Proper planning around these times is key to a successful seal that withstands use and adverse conditions.

Colour and Transparency

When selecting a silicone sealant, it’s important to consider the colour and transparency to achieve a seamless match or desired contrast with your project’s surroundings. Transparent silicone sealants are ideal for areas where you want to maintain the existing look without drawing attention to the seal itself.

If a particular colour is needed, there’s a variety of silicone sealants available in different hues to complement or highlight the surfaces you’re working with. Pay attention to the level of transparency or opaqueness; it can significantly affect how the sealant blends in or stands out.

Mould and Fungal Resistance

To safeguard your kitchen and bathroom against mold, opt for silicone sealants with built-in mould and fungal resistance, which thrive in high-humidity environments. When you’re picking out a sealant, make sure it has anti-fungal ingredients that effectively prevent and resist mold growth.

You’ll want to go for products that are certified for use in areas like showers and sinks, as they’re formulated to handle the moisture. Look for ones specifically designed to repel, kill, and prevent mould, ensuring your seal is protected for the long haul.

And don’t forget, the sealant must be waterproof to provide durable protection. By choosing the right product, you’re preventing mould before it starts, keeping your spaces clean and healthy.

Longevity and Durability

Ensure you select a silicone sealant that boasts a strong track record for longevity and durability, as this will be crucial for maintaining a waterproof seal in environments prone to moisture and wear.

Dive into manufacturer claims and scrutinise customer reviews to understand how the sealant fares against weather, sunlight, and mould.

Opt for products that offer a solid guarantee or warranty—this is often a signal of the manufacturer’s confidence in their sealant’s endurance, particularly for external or damp spaces.

Assess if the sealant can hold up in high-humidity zones, resist water, and combat mould, especially in bathrooms and kitchens.

Evaluate its curing time and application process; these factors can influence the sealant’s sustained performance.

Ease of Use

Selecting a silicone sealant that’s user-friendly is as crucial as its durability, so consider the application method and tools required for a smooth installation process. You’ll want a product that comes out of the tube easily and flows into cracks without clumping or becoming stringy. Look for sealants with nozzles that fit your specific job—narrow for precision or wider for larger gaps.

It’s also important to think about the curing time; if you’re in a rush, you don’t want to wait days for it to dry.

Ensure the sealant doesn’t require complex surface preparation, which can add to your workload. The easier it’s to prepare, apply, and clean up, the more time you’ll save on your project.

Frequently Asked Questions

Can Silicone Sealants Be Painted Over Once They Are Fully Cured, and if So, Which Types of Paint Are Compatible?

Yes, you can paint over fully cured silicone sealants, but you’ll need to use a paint that’s specifically formulated to adhere to silicone, like a latex or oil-based paint.

How Should Silicone Sealants Be Stored if There’s Leftover Material, and How Long Can They Be Kept Before They Expire?

You should store leftover silicone sealants in a cool, dry place, tightly sealed. They’ll typically last up to one year before expiring, but always check the expiration date to be sure.

Are There Any Eco-Friendly or Low-Voc Silicone Sealants Available That Are Also Effective for Waterproofing?

Yes, you’ll find eco-friendly, low-VOC silicone sealants like the Dryzone Anti-Mould Sealant that effectively waterproof. They’re formulated to be gentler on the environment while maintaining strong sealing capabilities. Look for green certifications on the label for assurance.

Can These Silicone Sealants Be Safely Used in Environments With Extreme Temperatures, Both Hot and Cold?

You can use these sealants in extreme temperatures; they’re designed to withstand both scorching heat and freezing cold, ensuring your projects stay sealed and protected no matter the weather conditions you face.

Conclusion

When selecting the ideal silicone sealant for your waterproofing needs, consider flexibility, mould resistance, and the specific application area. Brands like EVO-STIK, UniBond, and Everbuild offer top-tier options, each with unique properties tailored to kitchen, bathroom, or general-purpose use.

Whether you’re opting for clear, white, or mould-resistant sealants, ensure you’ve got the right fit for a flawless, enduring seal that’ll keep moisture at bay.

Choose wisely and your sealing job will be a cinch!

Disclaimer

plumbinghub.info is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com, amazon.co.uk, amazon.ca or amazon.it.

About Nick Jolliffe

With over two decades of experience in the Plumbing and Heating industry, Nick has become a trusted expert in the field. He has developed an impressive product knowledge across all aspects of plumbing and heating, including renewables, making him the go-to person for advice and product recommendations for any plumbing application. Whether you're a tradesperson or a DIY consumer, you can trust Nick to provide you with the right solution for your plumbing needs.

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