Aberdeen · Scotland
External Mastic in Portlethen
External mastic in Portlethen from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
Quotes for external mastic in Portlethen
The quote reflects the job in front of us. We take into account:
- The old material and how stubborn it is
- Working hours on commercial sites
- The number and length of the joints
- The product the joint needs
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Helping us quote
When you call or email, it’s useful to know:
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
- Whether it has been sealed before
Need a quote? Please send an email to info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
About our external mastic in Portlethen
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render. Common call-outs are for weeds or debris growing in open joints and rigid filler in a joint that should flex, on copings & trims, concrete & block and joints between brick and frames.
External sealant needs dry surfaces, so outdoor work around Portlethen is planned around the weather, and longer journeys are planned in advance. Let us know about access to every wall and roofline.
Every job is covered by a 12-month guarantee, wherever you are in Aberdeen.
- Where
- Portlethen (AB12)
- Region
- Aberdeen
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Do you need external mastic in Portlethen?
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint.
These are the problems we’re asked about most:
- Brick movement joints where the sealant has split
- Cracked joints where brick meets render or frames
- Joints where the bead has come unstuck
- Hard, crazed mastic that has stopped moving
For site and facilities teams at buildings such as Portlethen Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before you book
- What happens if the job turns out different
- How the joint is cleaned and prepared
- When the joint can take water or movement
- How long the guarantee is
Portlethen: your questions answered
Will you come out to Portlethen?
Yes, we do. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Portlethen station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can send an email to info@mrmastic.co.uk with the details for a clear quote.
Can you seal joints between two different materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces.
Can you reach joints on upper floors?
It depends on the height and the site. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
Is the work guaranteed?
Yes: twelve months. If anything isn’t right with the work within the year, let us know and we’ll sort it.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator.
DIY versus a professional finish
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Show decorators and builders where the movement joints are
- Keep movement joints as flexible joints, not mortar
- Have failed joints looked at early
- Look over the joints every year, ideally after winter
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
What we do, step by step
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. Outdoor work around Portlethen depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
Related advice
Walls and rooflines in Portlethen
Portlethen is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. With historic houses such as Friendville (about 4.8 miles north) nearby, there’s older building stock in the area around Portlethen as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For an older house near a landmark such as Portlethen Parish Church, an extension built onto an older house moves differently, and the joint between them takes the strain. For landlords with property near Portlethen station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Portlethen is about 6 miles south of Aberdeen, in Aberdeen. Homes, rented property, offices and hotels in Portlethen can book us for external mastic. Every job comes with our one-year guarantee. Our Aberdeen coverage runs to 63 places, and Portlethen is one of them. For nearby work, see our Aberdeen page, about 6 miles away.
Postcode districts we cover here for external mastic: AB12. If you need external mastic at a property on Mosside Drive, Muirend Road and Dunvegan Place or anywhere close by, our applicators can take on the job. With the A92 close by, Portlethen is easy for our applicators to reach. Nearby, we also carry out external mastic in Badentoy Park (1 mile north-west), Portlethen Village (1 mile south-east), Findon (1 mile east), Cammachmore (2 miles south-west) and Marywell (2 miles north-east). Further out, we also cover Aberdeen (6 miles north), Rosemount (6 miles north), Berryden (7 miles north), Ferryhill (5 miles north), New Aberdeen (6 miles north) and Dyce (10 miles north). Being one of Aberdeen’s larger places, Portlethen has every kind of property, from flats to offices.
What’s near Portlethen
Typical jobs here are in homes near Portlethen Academy. There’s a railway station in Portlethen itself: Portlethen station. Well-known places in the area include Blairs College (3.3 miles north-west) and Pitfoddels Castle (3.8 miles north). Green spaces nearby include Portlethen Moss and Loirston Loch.
Leave it or put it right?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. Around Portlethen, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please drop us a line at info@mrmastic.co.uk and we will talk you through it.
What you get with us
- Fully insured
- Sanitary silicone with an anti-fungal additive in wet areas
- Colour picked to suit the job
- Neat joints and a tidy finish
Read what affects the cost or what customers say.
Surface by surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.