PIPE & SERVICE PENETRATION SEALING IN LONDON
Free site survey, a written diagnosis and a fixed, itemised quotation — for warehouses and factories across London
We work on pipe penetrations and service entries in and around London, specifying the repair from a survey of the actual defect rather than from a price list, and applying it with waterproofing membranes.
How the Work Is Carried Out
From Park Royal to Beckton, the pattern is the same: survey, written diagnosis, fixed quotation, then installation to the relevant part of BS EN 1504 or BS 8102:2022. Fast-cure systems are specified where uptime is the constraint and conventional materials where durability matters more.
Areas We Cover
And across Greater London
Why Choose MPS?
Penetration Sealing Methods & Systems
We provide professional sealing solutions for pipe, cable, and service penetrations through walls, floors, and tank structures to prevent water ingress and maintain structural integrity.
Hydrophilic Sealing Compounds
Expanding waterstops and hydrophilic compounds that swell on contact with water, creating positive seals around pipes and cables penetrating basement walls and water tanks.
Elastomeric Link Seals
Flexible rubber link seals and compression gaskets for concrete pipe penetrations, accommodating movement while maintaining watertight integrity in underground structures.
Chemical Injection Grouts
Polyurethane and acrylic injection resins for sealing voids around existing pipe penetrations, filling annular gaps and stopping active water leaks behind service entries.
Mechanical Pipe Seals
Modular mechanical seals with compression bands for new installations, providing certified watertight seals for drainage, water, and service pipes through concrete structures.
Annular Void Sealing
Specialist mortars and expanding foams for sealing annular voids around cable and pipe penetrations, creating permanent barriers against water, gas, and vermin ingress.
Fire-Rated Penetration Seals
Intumescent and fire-resistant sealing systems for service penetrations requiring both waterproofing and fire compartmentation in commercial and industrial buildings.
Penetration Sealing Installation Process
Penetration Assessment
We inspect pipe and cable penetrations to determine size, material, water pressure, movement requirements, and any active leaks requiring immediate sealing.
Preparation & Cleaning
Penetration openings are cleaned, loose material removed, and surfaces prepared to receive sealing compounds. Active leaks may be stopped with quick-set plugs before permanent sealing.
Seal Installation
Appropriate sealing systems are installed - hydrophilic compounds for wet conditions, mechanical seals for new works, or injection grouts for existing penetrations with active leaks.
Testing & Protection
Completed seals are pressure-tested where possible, protected with mortar facings or fire-rated boards as required, and certified to meet waterproofing and building regulations.
Frequently Asked Questions
How much does penetration sealing cost?
Penetration sealing costs vary based on penetration size, accessibility, water pressure, and sealing method required. Individual pipe seal installations typically range from £200-£600, while multiple penetrations in commercial projects benefit from economies of scale. Contact us for site-specific quotations.
Can you seal penetrations that are actively leaking?
Yes, we use hydrophilic sealing compounds and expanding polyurethane grouts specifically designed to work in wet conditions. These materials react with water to form positive seals, stopping active leaks around pipes and cable penetrations even under continuous water pressure.
What's the difference between mechanical and chemical penetration seals?
Mechanical seals use compression gaskets and link seals installed during construction, providing certified watertight performance. Chemical seals use injection grouts or hydrophilic compounds for retrofitting existing penetrations or stopping active leaks. We select the appropriate system based on your specific application and access constraints.
Do penetration seals need to accommodate pipe movement?
Yes, service pipes experience thermal expansion, vibration, and settlement movement. We use flexible elastomeric link seals and resilient sealing compounds that maintain watertight integrity while accommodating normal pipe movement without seal failure or stress transfer to the structure.
Are penetration seals fire-rated?
Standard waterproofing seals are not fire-rated. Where penetrations pass through fire-rated walls or floors, we install specialist intumescent penetration seals that provide both waterproofing and fire resistance, maintaining compartmentation while stopping water ingress. These are certified to Building Regulations Part B requirements.
Standards, Credentials & Documented Work
What you can check before appointing us.
Standards that govern this work
- BS 8102:2022 — continuity of the waterproofing at service penetrations below ground
- BS EN 1366-3 — fire resistance testing of penetration seals, where the service passes through a compartment wall or floor
- Approved Document B — when compartmentation, and therefore fire-stopping, is required
Who does the work
MPS Concrete Solutions was founded in 2013 and works from Gamlingay, Cambridgeshire (SG19 3JW). Our operatives hold NVQs in resin and grout injection, CSCS, SSSTS and SMSTS cards, and PASMA and MEWP (3a/3b) training, and are confined-space trained.
- Constructionline Gold member; SSIP accredited
- UKAS-accredited certification to ISO 9001, ISO 14001 and ISO 45001
- Concrete Repair Association (CRA) member
- Sika-specified applicator
How we get to London
From our yard at Gamlingay in South Cambridgeshire, London is one and a half to two and a half hours. Day-return working on most jobs, which is why we can split works into short phases around your occupancy instead of taking an area out for a fortnight.
We say this plainly because it shows up in the price. Mobilisation, access plant and preparation equipment are largely fixed costs, so a single small repair a long way from base carries a much higher rate per square metre than the same work next door to us, or the same work bundled with other defects on one visit. If you have more than one problem on the site, it is worth having them all surveyed at once.
Reviewed by Jerry Blears, Director (LinkedIn), MPS Concrete Solutions. Last reviewed October 2026.
Our work in London
The Dumont, Albert Embankment, London Internal cementitious render to a PUDLO waterproof-concrete attenuation tank for St James Group, working in confined space; turned around in three days. Sterling Court, North London Podium deck and soffit remediation: breakout of defective concrete, re-levelling and a waterproofing system above occupied areas. Bromley South Central, London New expansion joint system and patch repairs to a multi-level car park, phased to keep it operational. Project George, Oxford Circus, London Basement cavity drain installation for LDD Construction at 100–140m² a day, finished in under five weeks against competitor quotes of eight or more. The Ridgeway, Mill Hill Waterproofing a long run of 20mm movement joints on a podium deck over a basement car park, under a 20-year PUDLO warranty. Canary Wharf, London Hydrophilic resin injection to stop active water ingress at the abutments of a bascule bridge beside the Jubilee Line exclusion zone.How to Seal Pipes & Services Through Concrete — Complete Guide
Covers penetration types, sealing systems (hydrophobic, intumescent, mechanical), fire rating requirements, and step-by-step installation details for pipes, cables and ducts through concrete walls and floors.
Read the full guideOur Other Services Across Greater London
Most sites need more than one of these, and it is usually cheaper to have them surveyed together than to mobilise twice.
Industrial Concrete Repairs
Fix cracks, spalling & structural damage
Resin Injection & Crack Sealing
Stop water ingress & seal cracks
Penetration Sealing
Seal pipe & cable penetrations
Cavity Drain Installation
Control basement moisture
External Waterproofing
Protect below-ground structures
Membrane Installation
Waterproof barriers for all surfaces
Send Us Photographs and We'll Tell You What It Is
If it needs a site visit, the survey is free. You get the findings, the cause, and an itemised quotation in writing — the documentation your engineer, insurer or managing agent needs to authorise the works.
