Mastic man, silicone resealing & commercial sealant contractors across the North West.

Stop black mould, peeling silicone, and leaking shower trays before water damages your ceilings. Led personally by Liam and our family-run team, we strip 100% of failed sealant back to bare substrate and tool razor-sharp, guaranteed watertight lines across Liverpool, Manchester, the Wirral, Chester, Cheshire, Warrington, Wigan and Leigh, alongside nationwide commercial site contracts.

100% Old Silicone Stripped Out (Never Capped)Guaranteed Mould-Free Watertight FinishFixed Quotes Confirmed from Photos
Backed by our Written 5-Year GuaranteeFree Return Visits
Luxury marble bathroom and freestanding bath silicone sealing by Next Level SealantsBathrooms & wet rooms
Commercial perimeter sealant at Aintree Racecourse Jockeys Changing RoomCommercial fit-outs
External cladding and glazing perimeter sealant at Marks & Spencer Speke Retail ParkFaçades & glazing
Customer Rating
01

5.0 / 5 on Google

54 reviews · Rated "Great price"

Insurance & Safety
02

£5m & £10m Insured

Public & employers' liability + RAMS

Where We Work
03

North West & UK Wide

NW domestic & nationwide commercial

Fair Pricing
04

Fixed Price Quotes

Guaranteed from photos before booking

Site Qualifications & Accreditations

Certified for domestic homes, commercial sites, powered access and high-rise rope access

CSCS - Construction Skills Certification Scheme
SSSTS - Site Supervisor Safety Training Scheme
IPAF - Powered Access (PAL Card) Certified
PASMA - Mobile Access Towers
IRATA - Industrial Rope Access Trade Association
NVQ L3 - Level 3 NVQ Diploma in Accessing Operations & Rigging

What do you need sealing?

From tired, mouldy shower trays at home to multi-plot commercial developments on site—we never cut corners. Every joint is mechanically stripped, sterilised, and hand-tooled with premium trade silicone.

Dark marble walk-in wet room and LED recessed tile niches sealed by Next Level Sealants01 · Domestic
Kitchen worktop and tiled splashback silicone finishKitchens

Homeowners & landlords

01

Domestic & Home Sealing

Transform leaking, mould-stained bathrooms and kitchens without the mess, expense, and disruption of retiling. We mechanically extract every millimetre of decayed sealant, deep-clean the substrate, and tool a razor-sharp, waterproof bead backed by our 5-Year Domestic Guarantee.

  • Mouldy bath, shower & wet-room silicone cleanly sliced out and replaced
  • Specialist shower tile regrouting led by our 22+ yr trade craftsman (Vinny)
  • Exact colour-matched silicone for quartz, granite, marble & splashbacks
  • Draught-proof perimeter mastic for UPVC, aluminium & timber frames
Commercial sealant package at Everton Stadium in Liverpool02 · Commercial
High-level commercial façade and window perimeter sealing at Mooreside PlaceRope access

Contractors & site teams

02

Commercial & Site Packages

Programme-ready, fully certified mastic teams for main contractors, developers, and shopfitters nationwide. Delivered on schedule with site-specific RAMS, £5m/£10m insurance, and proven execution on major landmarks like Everton Stadium, Aintree Racecourse, and M&S Speke.

  • Comprehensive subcontract mastic packages across the North West & UK
  • External facades, curtain walling, structural glazing & architectural cladding
  • Saw-cut warehouse floor slabs & structural movement expansion joints
  • IRATA Level 3 high-rise rope access & MEWP high-level repairs
Interactive Silicone Colour Studio
32 Trade Shades · Tap Any Area Below

See how colour-matched silicone looks on your surfaces.

1. Tap What You Need Sealing:

Tap any area to test surfaces & colours
Completed Bath & Shower Reseal
Matt BlackPopular Match

Deal directly with Liam.From first quote to finished job.

No call centres. No subcontracted strangers. From your first WhatsApp photo quote to the final tooled bead of silicone, Director Liam Harrison oversees your job personally. For specialist tile restoration, Liam works alongside family craftsmen with over 22 years on the tools—ensuring every joint is immaculate.

Liam

· Lead Mastic Specialist · 8 Years Experience

Your direct point of contact from quote to completion

22+ Years Trade Experience

· Grouting & Resealing

Trusted family & senior specialists on the tools alongside Liam

Certified & Fully Insured

· Domestic & Commercial

CSCS Gold, SSSTS, IPAF, PASMA, IRATA & NVQ L3 · £5m/£10m insured

Liam Harrison, Director and Lead Mastic Specialist at Next Level SealantsLiam · Next Level Sealants
Bathroom silicone sealing and tile regrouting by Next Level SealantsSilicone & Regrouting
Commercial mastic sealing by Next Level SealantsUK Commercial Sites

“Friendly, tidy and clearly takes a huge amount of pride in his work.”

54 Google reviews →

Rated 5.0★ by homeowners and site managers who inspect the finish up close.

5.0

54 five-star Google reviews

All 54 reviews
Showing 1 to 3 of 22
Domestic
“Great service no mess and and really professional job would definitely recommend them”
P

Peter Ruttledge

Google review

Domestic

Great price

“Not sure what to expect as you don’t have this kind of work done very often. Absolutely great experience and first-class workmanship. So pleased we chose this company. Would recommend 100%.”
P

Pierce O'Carroll

Google review

Commercial / project bathrooms

Top workmanship

“Top workmanship and quality job sealing bathrooms on one of our projects. Will definitely use again in future.”
J

Jaimie Hart

Google review

Backed by Our 5-Year GuaranteeDomestic Resealing & Finishing

Every Domestic Reseal Backed by Our 5-Year Guarantee.

We do not cap fresh silicone over old sealant. Because we cut out all failed material, solvent clean the joint and apply professional trade silicone, our sealant stays bonded. If it ever fails under normal domestic use, we return and replace it 100% free of charge.

Zero Peel & Lift Guarantee
100% Free Remedial Return Visit
Old Sealant Always Mechanically Cut Out
ARBO Anti-Fungal Sanitary Silicones

Applies to all domestic bathroom, shower, kitchen, window, door, and floor perimeter silicone resealing (excludes rigid cementitious tile grout). Commercial projects carry standard 12-month DLP.

Trade-Grade Standard

Why Next Level Can Guarantee Adhesion

Most handymen charge £50 to pump fresh silicone over mouldy old beads in 15 minutes. It peels in 3 months.

Full Mechanical Strip-Out

Every failed millimeter is removed right back to bare tile, acrylic, and frame.

Solvent Degreasing & Dry Prep

Silicone can only bond to chemically clean surfaces. We scrub soap scum and dry completely.

Pure Low-Shrinkage Silicones

Trade cartridges with active fungicides that flex with movement without splitting.

Direct Lead: Liam HarrisonWhatsApp Liam

Straight answers to common questions.

Clear, upfront answers about quoting from photos, 24-hour curing times, full strip-out prep, and our 5-Year Domestic Guarantee.

Still not sure what your job needs?

Send 2 or 3 quick photos and your postcode on WhatsApp. Liam will review your joints and confirm an exact fixed price before you book.

Ask about your job

Yes, bathroom, shower and wet-room resealing is one of our most requested services across Liverpool, the Wirral and the North West. We never patch over old sealant: we cut out all existing black or peeling silicone back to the substrate, clean and dry the joint thoroughly, and tool a fresh bead of mould-resistant sanitary silicone.

Yes. Alongside silicone resealing, our dedicated grouting specialist Vinny Harrison (over 22 years' trade experience) carries out bathroom, shower and kitchen tile regrouting across Liverpool, the Wirral, St Helens, Warrington, Wigan and the North West. We rake out cracked or mould-stained grout, repoint the tile lines with fresh waterproof grout, and seal all corner and tray movement junctions with sanitary silicone.

Always. Applying new silicone over old, degraded sealant traps moisture and mould underneath and will peel away quickly. On every domestic and commercial job, we strip out the failed material completely, clean and prepare the joint faces, and apply fresh trade-grade sealant so the bond and finish last properly.

Yes. We deliver internal and external commercial mastic packages for main contractors, shopfitters, developers and facilities teams across the North West and nationwide across the UK. Our portfolio includes Everton Stadium, Aintree Racecourse, Hugh Baird College and Marks & Spencer at Speke Retail Park, covering glazing perimeters, cladding, concrete floor expansion joints, new-build plots and IRATA Level 3 rope-access repairs.

For domestic work (bathrooms, tile regrouting, kitchens, floors and windows), we travel daily from our Liverpool base across Merseyside, the Wirral, St Helens, Prescot, Warrington, Widnes, Runcorn, Southport, Formby, Crosby, Ormskirk, Wigan, Chester, Cheshire and Greater Manchester with zero tunnel or call-out surcharges. For commercial mastic, new-build construction and rope-access contracts, we work nationwide across the UK.

Tell us what needs doing. Get a clear quote.

Get a fair, fixed quote without the hassle of a home visit. Send 2 or 3 clear photos on WhatsApp or call Liam directly on 0151 453 5755. We confirm your price upfront with zero hidden call-out fees.

Fixed price agreed upfront5-Year Domestic Guarantee£5m & £10m insured5.0 / 5 (54 Google reviews)

Speak with our team directly.

Call or message to explain what you need. Send a photo or drawing if it helps.