--- title: "Commercial Silicone Sealant Applicators in the City of London | SP Silicone Sealants" description: "Commercial silicone sealant and mastic applicators working in the City of London. Office fit-outs, curtain walling, acoustic and movement joints. 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We travel in from Chatham, around 35 miles east." } }, { "@type": "Question", "name": "How quickly can you get into the City?", "acceptedAnswer": { "@type": "Answer", "text": "Journey time is around an hour to an hour and a half depending on the crossing and time of day, so we plan arrival around delivery windows and traffic. Our hours are Monday to Saturday, 7am to 7pm, and we will confirm honestly what dates we can hold." } }, { "@type": "Question", "name": "What does sealant work cost in the City of London?", "acceptedAnswer": { "@type": "Answer", "text": "Quotes are free and fixed in writing, priced from measured runs against your drawings, with access assumptions, out-of-hours requirements and congestion or ULEZ costs stated openly rather than added later." } }, { "@type": "Question", "name": "Do you offer out-of-hours or weekend work?", "acceptedAnswer": { "@type": "Answer", "text": "We work Monday to Saturday, 7am to 7pm, which covers most early-start requirements in occupied buildings. If the work must happen outside that window, tell us at quote stage so it is planned and priced properly. We are not a 24-hour emergency service." } }, { "@type": "Question", "name": "Can you work to a main contractor's programme and permit system?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. RAMS are issued on request, we hold CITB and CSCS accreditation and £2 million public liability cover, and we work to building sign-in, permit and goods-lift booking arrangements." } }, { "@type": "Question", "name": "Do you provide cradles or MEWPs for facade work?", "acceptedAnswer": { "@type": "Answer", "text": "No — we work from the access provided. We will tell you at quote stage exactly what access each joint needs so it can be booked and priced properly." } }, { "@type": "Question", "name": "Which sealants do you use on curtain walling?", "acceptedAnswer": { "@type": "Answer", "text": "Neutral-cure, low-modulus, UV-stable silicone from Mapei, Illbruck, CT1 or Arbo, matched to the specification and confirmed by RAL or stone reference before ordering." } }, { "@type": "Question", "name": "Do you do fire-stopping as well?", "acceptedAnswer": { "@type": "Answer", "text": "No. Fire-rated and intumescent sealing is a separate discipline that we do not offer or advertise; it should be priced with a dedicated fire-stopping contractor even where the interfaces look similar to acoustic joints." } }, { "@type": "Question", "name": "Do you guarantee the work?", "acceptedAnswer": { "@type": "Answer", "text": "We do not advertise a guarantee. We specify to the facade or system detail, prepare thoroughly and size joints for movement, and we will tell you plainly what service life the detail should give in its exposure." } }, { "@type": "Question", "name": "Do you take on small City jobs as well as full packages?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — single-floor washroom or partition sealing, snagging works and remedial resealing are all worth asking about, and are quoted the same way as a full package." } } ] } ] --- SP. [07342 520584](tel:+447342520584)[spsilicone@mail.com](mailto:spsilicone@mail.com)Chatham, Kent Mon–Sat, 7am–7pm · Sunday closed [![SP Silicone Sealants logo](/__l5e/assets-v1/04f69d29-f7e4-4833-a846-7060bb9b1458/sp-logo-v5.webp)](/) [Home](/)[About](/about) Services Service Areas [Our Work](/our-work)[Contact](/contact)[07342 520584](tel:+447342520584)[Request Estimate](/contact) Menu [Home](/)/ [Service Areas](/service-areas)/ the City of London City of London — commercial # Commercial Silicone Sealant Applicators in the City of London fit-out grade, out of hours In the Square Mile the sealant line is inspected, the access is booked and the programme does not move. We price from drawings, arrive inducted with RAMS issued, and seal to a line that survives close inspection. [Request a free estimate](/contact)[07342 520584](tel:+447342520584) Free fixed quotes in writing, £2m public liability cover, CITB and CSCS accredited, RAMS on request. £2m cover public liability insurance CITB & CSCS accredited on site RAMS on request for commercial jobs Free quotes photo quotes on small jobs Mon–Sat, 7am–7pm Sunday closed 01 the City of London coverage ## Sealant work in the City of London, done by people who know it We work into the City from our base at The Historic Dockyard in Chatham, around 35 miles east. The A2 and the Blackwall or Rotherhithe crossings bring us in, and we plan City visits around delivery windows, ULEZ and congestion charging rather than pretending central London logistics do not exist — so our arrival time is one you can plan a floor around. ### Working in the Square Mile We work commercially across the City of London — the office core around Bishopsgate, Fenchurch Street, Leadenhall and Gracechurch Street, the Barbican and London Wall, Aldgate, Blackfriars and the riverside, and the fringes into Shoreditch and Farringdon. This is fit-out and refurbishment work almost exclusively: sealant packages that sit inside a main contractor's programme, alongside dryliners, glaziers, flooring and M&E. We are a two-person owner-run team, which means we are a defined, predictable presence on a floor rather than a fluctuating labour supply. ### Access, permits and out-of-hours City buildings run on booked goods lifts, permits to work, sign-in systems and out-of-hours restrictions. We send RAMS on request and evidence of £2 million public liability cover in advance, book induction properly, and work to the building's rules on hot works, noise and access. Our hours are Monday to Saturday, 7am to 7pm, which covers the early starts most occupied City buildings require. Where sealing has to happen outside those hours because of tenant occupation, tell us at quote stage so it is priced and planned rather than negotiated on the night. ### The buildings we seal here The City runs from Victorian and Edwardian stone-faced banking halls through 1960s and 70s concrete-framed towers to contemporary glazed high-rise, often on the same street. Internally it is glazed partitioning, raised access floors, exposed services and open-plan floor plates with metres of exposed junction detail. Externally it is curtain walling, structural glazing, stone cladding and rainscreen panels, with joints that can only be reached from a cradle, MEWP or scaffold. Access is booked and expensive, which is precisely why the joint needs to be right the first time. ### What the City books us for Curtain walling and facade joint sealing, movement and expansion joints in framed structures, and stone cladding perimeter pointing where specified. Internally: acoustic sealing to partition perimeters, heads and service penetrations in meeting rooms and boardrooms, floor line and wall junction mastic across open-plan floors, washroom and tea-point sealing, and full sealant packages on Cat A and Cat B fit-outs. Areas & districts covered Bishopsgate · Fenchurch Street · Leadenhall · Gracechurch Street · Barbican & London Wall · Aldgate · Blackfriars · Moorgate · Liverpool Street · Farringdon fringe · EC1 · EC2 · EC3 · EC4 02 Services in the City of London ## Every sealant service we offer, available across the City of London - [ ![Marble spiral staircase joints sealed in a commercial building](/__l5e/assets-v1/0599e8eb-17c5-4315-932c-3b5d292fb75b/commercial-silicone-sealant-01.jpg) ](/services/commercial-silicone-sealant-application) ### [Commercial silicone sealant application in the City of London](/services/commercial-silicone-sealant-application) Cat A and Cat B fit-out sealant packages priced from drawings and sequenced around every other trade on the floor. - [ ![Glass curtain wall sealed to terrazzo flooring with a thin neat silicone joint](/__l5e/assets-v1/d4b50d34-7e21-4b94-ad7b-b8cf87f2b4ec/cladding-curtain-walling-sealing-02.jpg) ](/services/cladding-curtain-walling-sealing) ### [Cladding & curtain walling sealing in the City of London](/services/cladding-curtain-walling-sealing) Curtain walling, structural glazing and stone cladding joints sealed with neutral-cure product, worked from the cradle or MEWP booked on site. - [ ![Glazed office partition and meeting room screen with acoustic sealant applied to the perimeter framing joints](/__l5e/assets-v1/5b178dbf-57bc-4ae9-b3b0-48f2b550b8cc/acoustic-sealant-office-partition-01.jpg) ](/services/acoustic-sealant) ### [Acoustic sealant in the City of London](/services/acoustic-sealant) Partition perimeters, deflection heads and service penetrations sealed so boardrooms and meeting rooms deliver real speech privacy. - [ ![External movement joint between brickwork panels prepared for expansion joint sealant](/__l5e/assets-v1/c1c8e7ae-2092-4629-a166-133251417d8a/external-silicone-sealant-before-02.jpg) ](/services/expansion-joint-sealing) ### [Expansion joint sealing in the City of London](/services/expansion-joint-sealing) Structural movement joints in framed towers cut out, backed correctly and resealed with low-modulus product. - [ ![Neutral-cure silicone mastic applied to a stone tile floor-to-wall joint](/__l5e/assets-v1/a70f1c6d-6266-454c-b553-ad933839b6aa/floor-line-wall-joint-mastic-application-01.jpg) ](/services/floor-line-wall-joint-mastic) ### [Floor line & wall joint mastic in the City of London](/services/floor-line-wall-joint-mastic) Long, uninterrupted floor and wall junction lines across open-plan floor plates, tooled to survive commercial cleaning. - [ ![Weatherproof external sealant joint between a black door frame and brickwork](/__l5e/assets-v1/253b7ff0-9d17-4ddd-9dc5-712c5de81689/external-silicone-sealant-after-01.jpg) ](/services/external-silicone-sealant) ### [External silicone sealant in the City of London](/services/external-silicone-sealant) UV-stable external joints on stone, concrete and panel elevations, sized for the movement a tall building actually sees. - [ ![Colour-matched silicone sealant cartridge used beside a yellow glass splashback](/__l5e/assets-v1/42471476-abc6-4674-8631-6e87af0c4057/colour-matched-silicone-sealant-01.jpg) ](/services/colour-matched-silicone-sealant) ### [Colour-matched silicone sealant in the City of London](/services/colour-matched-silicone-sealant) Beads matched to RAL frame colours, stone tones or panel finishes so the joint reads as part of the architecture. - [ ![Large glass sliding doors sealed to a timber-beamed opening](/__l5e/assets-v1/ecbc5ba9-a7e9-4177-bd7c-0b26a00a2cec/window-door-silicone-sealing-01.jpg) ](/services/window-door-silicone-sealing) ### [Window & door silicone sealing in the City of London](/services/window-door-silicone-sealing) Perimeter sealing to glazed openings and entrance screens, keeping wind-driven rain out of the envelope. - [ ![Freshly replaced white silicone sealant in a grey stone-tiled shower corner after old sealant removal](/__l5e/assets-v1/0b254bf3-7d39-48da-9323-60631e7d5944/sealant-replacement-shower-corner-01.jpg) ](/services/sealant-replacement-removal-reseal) ### [Sealant replacement — removal & reseal in the City of London](/services/sealant-replacement-removal-reseal) Failed facade and internal joints stripped out and replaced properly during refurbishment, not overlaid. - [ ![Crisp white silicone sealant line where a marble kitchen worktop meets a fluted splashback](/__l5e/assets-v1/81fc53a1-5c52-4b84-bd99-66cca8348ee6/kitchen-silicone-sealing-after-03.jpg) ](/services/bathroom-wet-room-kitchen-sealing) ### [Bathroom, wet room & kitchen sealing in the City of London](/services/bathroom-wet-room-kitchen-sealing) Washroom, shower and tea-point sealing in office floors and end-of-trip facilities, using anti-mould products. - [ ![Wet room sealed with mould-resistant white silicone around the shower area](/__l5e/assets-v1/aaf3c020-6391-42bf-9eb7-a10970e97d28/wet-room-silicone-sealing-after-01.jpg) ](/services/anti-mould-sealant) ### [Anti-mould sealant in the City of London](/services/anti-mould-sealant) Mould-resistant sealing for showers, changing areas and washrooms in heavily used commercial buildings. - [ ![Large indoor swimming pool with sealed movement joints and stone surround](/__l5e/assets-v1/0145e098-1f26-460f-8075-65f99ab38e5c/swimming-pool-silicone-sealing-after-02.jpg) ](/services/swimming-pool-leisure-sealant) ### [Swimming pool & leisure sealant in the City of London](/services/swimming-pool-leisure-sealant) Chlorine-resistant sealing for basement pools, spas and wet leisure facilities in City buildings and hotels. [See all sealant services](/services) 03 Why us in the City of London ## A specialist trade, not a general builder ### Site-ready paperwork RAMS issued on request, CITB and CSCS accreditation and £2 million public liability cover, all sent before induction so nothing delays your floor. ### 25+ years of application More than twenty-five years applying sealant on commercial work, including glazed elevations, long floor runs and acoustic partition detail. ### Priced from drawings Free fixed written quotes against measured runs with products named, so the specification can be checked before anything is ordered. ### One consistent bead The same two applicators across an entire elevation or floor plate — which is the only way bead width and profile stay identical at inspection. ### Programme-aware sequencing We attend at first fix and again for penetrations and snagging, because acoustic and perimeter seals become inaccessible once linings close. ### Access used once We plan facade work into the cradle or MEWP window you have already paid for, rather than needing it re-mobilised later. 04 Local conditions ## What actually fails on the City of London buildings ### Access that costs more than the sealant On a City facade, the material in a joint is trivial next to the cost of reaching it. Cradle time, MEWP hire, permits, road closures and out-of-hours supervision are the real budget, and a joint that fails early means paying all of it twice. That is why we prepare rather than rush: cut out fully, clean the joint faces, prime where specified, fit correctly sized backing rod and tool the bead properly. The extra hours on the first visit are cheap insurance against a second mobilisation. ### Coated aluminium, glass and stone on the same elevation City facades routinely combine powder-coated and anodised aluminium, glass, natural stone and composite panels. Acidic-cure silicone can attack those coatings and stain porous stone permanently — a defect that is remedied by panel or stone replacement, not cleaning. Every facade joint we seal here uses neutral-cure, low-modulus, UV-stable product, primed where the manufacturer requires it, with colour agreed against RAL or stone reference before ordering. ### Occupied towers, tight sequences and buried seals Fit-outs in occupied buildings run to a sequence that does not wait. Acoustic perimeter seals at partition heads and first board layers become inaccessible once boarding and decoration are complete, and a seal applied late is a seal that does nothing. We agree the sealing stages with your site manager up front and attend more than once where the sequence demands it — first fix, then penetrations after M&E, then snagging — instead of sealing everything visible in one pass. ### Inspection standards and visible lines In the City, sealant is inspected — by the main contractor, the client's team, and everybody who walks a marketing suite. A wandering line across a curtain walling grid or an inconsistent floor junction on a hundred-metre plate reads as a defect even when it is watertight. We set bead widths out before starting, work in continuous passes, and check each lift or run before moving on. It is the reason we keep the team to two people and do not subcontract. 05 How a job runs ## The same order of work, every job in the City of London ![External silicone sealant joints on a refurbished elevation, surveyed before pricing](/__l5e/assets-v1/8b14e32b-b903-4e6f-8d81-09b61b230f01/external-silicone-sealant-after-02.jpg) Step 01 — Call, email or send photos 1. 01 ### Call, email or send photos Tell us the job and the address. Photos or drawings are usually enough to price small and mid-sized work. ![External silicone sealant joints on a refurbished elevation, surveyed before pricing](/__l5e/assets-v1/8b14e32b-b903-4e6f-8d81-09b61b230f01/external-silicone-sealant-after-02.jpg) 2. 02 ### Free quote in writing A fixed written price with the products named — no day-rate guessing and no pressure to commit. ![Kitchen worktop and splashback joints measured for a written sealant quote](/__l5e/assets-v1/a2d5a56c-3937-4f68-9647-654a81702aa5/kitchen-silicone-sealing-after-02.jpg) 3. 03 ### Booked to suit the site A date agreed around your access, trades or household, inside our Monday to Saturday, 7am to 7pm window. ![Commercial interior with sealant work booked around other trades on site](/__l5e/assets-v1/da1331af-6d50-4967-a000-513f6378ac8d/commercial-silicone-sealant-03.jpg) 4. 04 ### Preparation first Old sealant cut out, substrates cleaned and dried, backing rod fitted where the joint needs depth control. ![Curtain walling joints cut out and prepared before fresh sealant is applied](/__l5e/assets-v1/d8ee498f-1ae2-497e-afc2-ae567559760f/cladding-curtain-walling-sealing-01.jpg) 5. 05 ### Sealed, tooled, cleared up Continuous beads tooled to profile, edges cleaned off, and the area left tidy with cure times explained. ![Completed wet room with silicone beads tooled to a clean straight profile](/__l5e/assets-v1/d82a5005-d14e-431f-9071-3f7b7722c55a/wet-room-silicone-sealing-after-02.jpg) 06 Questions ## the City of London sealant questions, answered straight ### Do you work in the City of London? Yes — commercially, across the City core, Barbican and London Wall, Aldgate, Blackfriars, the riverside and the Farringdon and Shoreditch fringes. We travel in from Chatham, around 35 miles east. ### How quickly can you get into the City? Journey time is around an hour to an hour and a half depending on the crossing and time of day, so we plan arrival around delivery windows and traffic. Our hours are Monday to Saturday, 7am to 7pm, and we will confirm honestly what dates we can hold. ### What does sealant work cost in the City of London? Quotes are free and fixed in writing, priced from measured runs against your drawings, with access assumptions, out-of-hours requirements and congestion or ULEZ costs stated openly rather than added later. ### Do you offer out-of-hours or weekend work? We work Monday to Saturday, 7am to 7pm, which covers most early-start requirements in occupied buildings. If the work must happen outside that window, tell us at quote stage so it is planned and priced properly. We are not a 24-hour emergency service. ### Can you work to a main contractor's programme and permit system? Yes. RAMS are issued on request, we hold CITB and CSCS accreditation and £2 million public liability cover, and we work to building sign-in, permit and goods-lift booking arrangements. ### Do you provide cradles or MEWPs for facade work? No — we work from the access provided. We will tell you at quote stage exactly what access each joint needs so it can be booked and priced properly. ### Which sealants do you use on curtain walling? Neutral-cure, low-modulus, UV-stable silicone from Mapei, Illbruck, CT1 or Arbo, matched to the specification and confirmed by RAL or stone reference before ordering. ### Do you do fire-stopping as well? No. Fire-rated and intumescent sealing is a separate discipline that we do not offer or advertise; it should be priced with a dedicated fire-stopping contractor even where the interfaces look similar to acoustic joints. ### Do you guarantee the work? We do not advertise a guarantee. We specify to the facade or system detail, prepare thoroughly and size joints for movement, and we will tell you plainly what service life the detail should give in its exposure. ### Do you take on small City jobs as well as full packages? Yes — single-floor washroom or partition sealing, snagging works and remedial resealing are all worth asking about, and are quoted the same way as a full package. ## Nearby areas we also cover - [Sealant in Bexley](/service-areas/bexley) Inter-war suburban housing, schools and light-industrial units across the London Borough of Bexley. - [Sealant in Meopham](/service-areas/meopham) North Downs village property, large detached homes and chalk-hillside exposure around Meopham. - [Sealant in Sevenoaks](/service-areas/sevenoaks) Period and commuter-belt homes, conservation-area detail and office refurbishments across the Sevenoaks district. - [Sealant in Maidstone](/service-areas/maidstone) County-town commercial work, ragstone and river-valley properties, plus new-build estates across Maidstone. [See every area we cover](/service-areas) Free estimate ## Free fixed quote for City of London sealant packages Send the fit-out or facade drawings, your programme and the access arrangements. We will measure the runs, name the products, state the access we need and issue RAMS on request. [Request a free estimate](/contact)[Call 07342 520584](tel:+447342520584) Mon–Sat, 7am–7pm · Sunday closed · spsilicone@mail.com · Based at The Historic Dockyard, Chatham, Kent ME4 4QX ![SP Silicone Sealants logo](/__l5e/assets-v1/ccba0574-1fb2-45c8-9c24-82adeb90c706/sp-logo-v5-light.webp) Specialist silicone sealant and mastic applicators serving domestic and commercial clients across Kent, London and the South East. [@SPSilicone](https://www.instagram.com/spsilicone) ### Opening Hours - Monday 7am – 7pm - Tuesday 7am – 7pm - Wednesday 7am – 7pm - Thursday 7am – 7pm - Friday 7am – 7pm - Saturday 7am – 7pm - Sunday Closed ### Contact - [07342 520584](tel:+447342520584) - [spsilicone@mail.com](mailto:spsilicone@mail.com) - The Historic Dockyard Chatham, Kent ME4 4QX ### Sealant Services - [Commercial silicone sealant application](/services/commercial-silicone-sealant-application) - [Bathroom, wet room & kitchen sealing](/services/bathroom-wet-room-kitchen-sealing) - [Window & door silicone sealing](/services/window-door-silicone-sealing) - [External silicone sealant](/services/external-silicone-sealant) - [Expansion joint sealing](/services/expansion-joint-sealing) - [Floor line & wall joint mastic](/services/floor-line-wall-joint-mastic) - [Sealant replacement — removal & reseal](/services/sealant-replacement-removal-reseal) - [Colour-matched silicone sealant](/services/colour-matched-silicone-sealant) - [Swimming pool & leisure sealant](/services/swimming-pool-leisure-sealant) - [Anti-mould sealant](/services/anti-mould-sealant) - [Acoustic sealant](/services/acoustic-sealant) - [Cladding & curtain walling sealing](/services/cladding-curtain-walling-sealing) - [All silicone sealant services](/services) ### Areas We Cover - [Sealant specialists in Chatham](/service-areas/chatham) - [Sealant specialists in Maidstone](/service-areas/maidstone) - [Sealant specialists in Sevenoaks](/service-areas/sevenoaks) - [Sealant specialists in Tunbridge Wells](/service-areas/tunbridge-wells) - [Sealant specialists in Kings Hill](/service-areas/kings-hill) - [Sealant specialists in Meopham](/service-areas/meopham) - [Sealant specialists in Tenterden](/service-areas/tenterden) - [Sealant specialists in Whitstable](/service-areas/whitstable) - [Sealant specialists in Bexley](/service-areas/bexley) - [Sealant specialists in the City of London](/service-areas/city-of-london) - [Every area we cover in Kent](/service-areas) Looking for something specific? We handle [bathroom silicone sealing in Chatham](/services/bathroom-wet-room-kitchen-sealing), [old sealant removal and reseal](/services/sealant-replacement-removal-reseal), [window and door perimeter sealing](/services/window-door-silicone-sealing), [commercial mastic applicators in Kent](/services/commercial-silicone-sealant-application), [expansion joint sealing for main contractors](/services/expansion-joint-sealing), [cladding and curtain walling sealing](/services/cladding-curtain-walling-sealing) and [swimming pool sealant work](/services/swimming-pool-leisure-sealant). See [photos of our recent sealant work](/our-work) or [meet the family-run team behind SP Silicone Sealants](/about). © 2026 SP Silicone Sealants Limited. 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