Find mastic sealant companies near me

Mastic sealant does a great job of preventing leaks, stopping drafts, and protecting your home from water damage.

But achieving a neat and long-lasting finish? That’s where experienced mastic sealant companies near you can help.

Find mastic sealant companies near you

Finding mastic sealant companies near you is simple with Checkatrade.

1. Search your postcode

Enter your postcode in our search tool to browse mastic sealant services in your area.

2. Easily check and compare

View profiles, check experience, and read customer reviews. Then create a shortlist of mastic sealing services near you.

3. Get in touch

Contact your chosen sealant company to discuss the job, request quotes, and arrange a site visit.

Why use Checkatrade to find professional mastic sealant companies near you?

Only tradespeople who pass our checks and commit to upholding the Checkatrade Standard appear in our listings. So you'll know it will be a quality job, whichever tradesperson you choose.

To find checked and reviewed mastic sealant services in your local area, start searching with your postcode – it's that simple.

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Hear from homeowners like you...

This London homeowner hired Global Sealant Services to refresh the sealant in their bathrooms:

Dave has just done a great job replacing the sealant in my bathroom and two wet-rooms. He's competent and pays attention to detail, with neat and even application of the sealant, cleaned up well after completing the work and I'd definitely use him again. Have recommended him to my neighbours!

Find other sealant and restoration services

• Bath resurfacing near me

• Tile restoration near me

Why not download the Checkatrade app, for all the tradespeople you need at your fingertips?

What is mastic sealant used for?

Mastic sealant is used to seal gaps, joints, and edges where different surfaces meet, such as:

• Concrete (flooring)

• Wood (skirting boards, panelling & door frames)

• Metal (exterior roof flashing & vents)

• Glass (window frames)

In bathrooms, it’s often applied around tiles, window frames, skirting boards, and along ceilings where flexibility and a neat finish are needed but full waterproofing isn’t essential.

Why you might need mastic sealant services

Mastic sealant plays a key role in keeping your home watertight and looking its best. Here are some common signs it’s time to call in a professional:

• Peeling, cracking, or shrinking sealant

• Unsightly mould or discolouration

• Leaks or damp around fixtures

• After a renovation or new installation

• Drafts or gaps around windows and doors

What does mastic sealing involve?

Mastic sealing might look simple, but it’s often fiddly and time-consuming to get right if you want a neat finish.

Whether you need bathroom resealing, kitchen sealant repair, or window sealant repair, the process is very similar. This typically involves:

• Removing old sealant (if needed) – Carefully cutting away existing silicone to avoid damaging surfaces

• Cleaning and preparing the area – Removing residue, mould, and moisture to ensure proper adhesion

• Applying new sealant – Using the right product (e.g. anti-mould silicone for bathrooms or weatherproof sealant for windows)

• Smoothing the finish – Creating a neat, even bead for a professional look and effective seal

• Allowing time to cure – Leaving the sealant to fully set before exposing it to water or movement

Ready to revive your bathroom or kitchen sealant? Or do you need to get your new renovation watertight?

Search your postcode below to find and hire the best mastic sealant companies near you.

How much does a mastic handyman charge in the UK?

The average cost to remove and replace bathroom sealant is £50 - £100. This includes supplying and installing the new sealant, which is usually white or clear silicone.

Wondering what kitchen or window sealant repair costs? You're best off contacting mastic sealant companies directly to get an exact quote.

Or try our interactive cost calculator below for an instant estimate based on a mastic sealant price per metre.

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Questions to ask before hiring mastic sealing services

Ask these questions to make sure you’re getting a quality job done:

• What type of sealant would you recommend? (anti-mould silicone or weatherproof sealant)

• Do you have relevant experience?

• What preparation is needed before you arrive?

• Is old sealant removal included in your quote?

• How long will the job take, and when can it be used again?

• Can you provide recent customer reviews or before-and-after photos?

We check the reviews on Checkatrade are from real people, and that trades meet our high standards.

Is it worth hiring a professional for mastic sealing?

While removing or applying sealant yourself is possible, hiring a professional means:

• A neat, smooth finish

• Proper removal of old sealant

• Long-lasting, watertight results

• Less risk of future leaks or mould

So, whether it’s sealing a new installation or replacing worn-out silicone, a professional finish can make all the difference.

Why use Checkatrade to find the best mastic sealant companies near you?

• Checked - Every Checkatrade member must pass up to 12 checks and commit to upholding the Checkatrade Standard

• Reviewed - Over 6.2 million reviews have been published on Checkatrade on everything from communication, tidiness, timekeeping, and quality of work

• Guaranteed - Jobs booked through Checkatrade are covered up to £1,000 (T&Cs apply)

Request a quote, search in the Checkatrade app, or enter your postcode below to find the best mastic sealant companies near you.

Need more advice on home improvements? At Checkatrade, we're here to help. From painter and decorator costs, to how to regrout your tiles – we’ve got it covered.

Other FAQS about mastic sealant

Is mastic the same as silicone sealant?

Mastic isn’t the same as silicone sealant. While both products seal gaps and prevent leaks, they’re made from different materials:

• Silicone sealant is flexible and waterproof

• Mastic (sometimes called acrylic mastic) is better suited for low-moisture areas like skirting boards or windows

In bathrooms, professionals usually prefer silicone sealant because it resists mould and stays flexible over time.

Is mastic sealant waterproof?

Not all mastic sealants are fully waterproof:

• Traditional acrylic mastic may soften or fail in areas with constant moisture

• Silicone sealant for showers, baths, and sinks is designed to resist mould, humidity, and water damage

If you’re unsure what to use, a sealant specialist near you can help.

Can you fill holes with mastic?

If you have large holes or gaps that you want to fill, it's best to use a decorator's caulk. Unlike silicon mastic, caulk can be painted over, making it ideal for jobs such as sealing the gap between walls and woodwork.

How long does mastic take to dry?

Mastic sealant is usually touch-dry within an hour. To be on the safe side, it's recommended to wait at least six hours for the mastic to dry properly, or 24 hours for a full cure.

How long does mastic last?

You can expect a standard mastic sealant to stay in place for up to five years before it requires replacing. However, a long-lasting external weatherproof sealant can last anywhere from 10 - 20 years.

Why would a homeowner use mastic sealant instead of silicone in a bathroom?

Homeowners sometimes choose mastic sealant over silicone for specific areas of the bathroom because:

• It can be painted – Ideal for joints around walls, ceilings, or trim where you want a seamless look

• It gives a smoother, less shiny finish

Can you seal over old silicone?

It’s not recommended to seal over old sillicone. For best results, old sealant should be completely removed before applying new mastic. This ensures proper adhesion and prevents leaks.

What is the best sealant for bathrooms?

A high-quality anti-mould silicone sealant is best for bathrooms. It’s designed to resist moisture, prevent black mould, and stay flexible over time.

Why does silicone sealant go mouldy?

Mould forms when sealant is exposed to constant moisture and poor ventilation. Over time, even anti-mould products can degrade, so eventually replacement is inevitable.

Ready to get started? Search your postcode below to find professional mastic sealant companies near you.

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