In most buildings, a failed sealant joint is a maintenance nuisance. In healthcare it can be more than that. Mould in a washroom joint, an open gap in a clinical area or a breached fire-resisting wall all carry risks for people who may be unwell, frail or unable to move quickly.
This guide is for estates managers, FM providers and contractors planning sealant work in hospitals, clinics and care homes. It covers infection control, phasing around patients and residents, permits and site rules, fire-rated sealing and the records you should expect. Your own trust’s or provider’s estates and infection-control requirements always come first.
Why healthcare sealing is different
Healthcare buildings combine several demands at once. Patients and residents are present day and night. Some areas must stay clean to a high standard. Many residents in care homes can’t leave the building quickly in an emergency, so compartmentation matters a great deal. And wards, clinics and rooms can rarely be taken out of use for long.
NHS estates guidance is set out in Health Building Notes (HBN) and Health Technical Memoranda (HTM). Trusts and care providers translate these into their own rules. Sealant contractors need to work within them, not around them.
Infection control
Sealant joints play a part in keeping surfaces cleanable. A smooth, continuous joint can be wiped down. A cracked or mouldy one traps dirt and moisture.
When joints are being replaced, typical infection-control measures include:
- agreeing the method with the infection prevention team before work starts
- screening or sealing off the work area where required
- controlling dust from cutting out old sealant
- removing waste promptly and in a way the site approves
- cleaning down before the area returns to use
- using sanitary anti-mould silicone in wet areas, or other products the trust specifies
Requirements vary by area. A plant room is not an isolation room. Ask what applies to each space. Where the trust or provider grades areas by risk, use those grades in the method statement so everyone on site knows which controls apply where. Clarify who signs off each area as clean and ready before it goes back into use.
Washrooms, en-suites and sluices
Washrooms, en-suites, assisted bathrooms and sluice rooms see heavy use and intensive cleaning. Joints around basins, WCs, showers, IPS panels, vanity units, trays and wet room floors wear quickly. Mould grows into sealant and often can’t be cleaned out, so it is replaced.
Joints are cut out, the faces cleaned and dried, and new sanitary silicone applied and allowed to cure. Phased work can keep some facilities open on each ward or floor. See washroom sealing for how we approach these spaces.
Phasing around patients and residents
Healthcare work almost always has to be phased. Practical points:
- agree a room-by-room or bay-by-bay sequence with ward or home managers
- allow for sealant cure time before rooms go back into use
- minimise odour in occupied areas and agree ventilation
- keep noise down near patients and residents
- keep escape routes clear at all times
- be ready to pause if a clinical need arises
Tell us your site hours and access windows and we’ll plan around them. Phased work can be planned so areas stay in use.
Need the work done? Mastic Doctor covers South East England, London and all of Scotland, with a 12-month guarantee on our workmanship. Send details for a fixed quote.
Permits, inductions and site rules
Most healthcare estates have their own permit systems. Common requirements include:
- site induction for each operative
- permits to work in plant rooms, risers and ceiling voids
- controls on fire alarm detectors where work could trigger them
- escort or sign-in rules in clinical and secure areas
- checks of the asbestos register before disturbing old mastic
Build these into the programme from the start. They take time, and missing them can stop work on the day. Our guide to CDM and RAMS for sealant work covers the paperwork side.
Fire-rated sealing in healthcare buildings
Compartmentation is central to how many healthcare buildings protect people who can’t easily evacuate. Fire-resisting walls and floors need their service penetrations and linear gaps properly sealed, and new cabling or pipework often breaches them.
Mastic Doctor installs fire-rated and intumescent sealant around service penetrations and linear gaps where it is specified, to the manufacturer’s tested details. We don’t design fire stopping or sign it off. That sits with the trust’s or provider’s fire engineer, designer and building control. If a tested detail calls for a collar, wrap or batt, we’ll say so. See fire stopping and our guide to fire stopping explained.
Records you should expect
Healthcare estates usually need better records than most clients. Typical requests include:
- location of each joint or seal worked on
- products used, with data sheets
- for fire-rated work, the tested detail followed
- photos before and after, where practical
- dates and the operatives involved
Tell us what records you need and we’ll confirm with the quote. Agree the format early so it fits your estates or CAFM system. Good records also make the next round of work quicker, because the joints, products and access arrangements are already known.
Planning and quoting the work
Healthcare jobs go best when the brief is detailed from the outset. Useful information to share at quote stage includes:
- the areas involved and how they are used, such as ward, clinic, resident rooms or back of house
- infection-control requirements for each area
- the asbestos register for older buildings
- any fire-stopping specification and tested details
- permits, inductions and working hours
- the records format you need at the end
Photos or a site visit then let the contractor see joint condition, access and phasing constraints before giving a fixed quote. Our guide to planned sealant maintenance covers how to fold healthcare sites into a wider programme.
Choosing a contractor for healthcare work
When appointing, look for evidence of health and safety vetting, appropriate insurance, workers with recognised cards, and a clear method that fits your infection-control and permit rules.
Mastic Doctor is CHAS accredited and a Constructionline member, with CSCS-carded applicators, £5m public liability insurance and a 12-month guarantee on workmanship. We have worked on commercial sealant since 2005. See our healthcare page, then send details through our quote form or contact us.
Quick answers
Can sealant work be done while wards stay open?
Usually, by phasing room by room or bay by bay and allowing cure time before each area reopens. The sequence should be agreed with ward or home managers.
What sealant is used in hospital washrooms?
Typically sanitary silicone with anti-mould additives, or whatever product your trust specifies. Old sealant is cut out completely first.
Do care homes need fire-rated sealing?
Fire-resisting walls and floors in care homes need their penetrations and gaps sealed as designed. Your fire engineer or designer decides the system; we install it where specified.
What records will we get?
Tell us what you need, such as locations, products, photos and tested details, and we’ll confirm with the quote.
Do you follow our infection-control rules?
Yes. Your trust’s or provider’s estates and infection-control requirements set the method, and we work within them.
Does the asbestos register matter for sealant work?
Yes, in older buildings. Some older mastics can contain asbestos, so the register should be checked before old sealant is cut out. Work stops if asbestos is suspected.
Related services
- Commercial washroom and wet-area sealing
- Fire-rated sealing and fire stopping
- Commercial sealant contractors
More advice
- Fire Stopping Explained for Building Owners
- Fire Stopping After M&E and Fit-Out Works
- CDM and RAMS Basics for Sealant Work
- Planned Sealant Maintenance for FMs
- All advice
This guide is general information about sealant work. It isn’t legal, fire-safety or structural advice; for those, speak to a qualified professional.