While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more

To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more

See what reviewers are saying

Rated 5 out of 5 stars

The quote I received for the work was fair and reasonable. The workmen turned up on time and did an excellent job of sealing my windows. I would have no hesitation in recommending the Company for sea... See more

Rated 5 out of 5 stars

Absolutely the best company we've worked with in a full house renovation. John was amazing from start to finish. Great communication throughout, turned up in time, did an excellent job sealing our kit... See more

Rated 5 out of 5 stars

Came to price job, quote accepted and work carried out days later. Great communication, top notch job of removing old seal round bath and floor and repacement shower screen seal. Work carried out qui... See more

Company replied

Rated 5 out of 5 stars

John Cairney of this company is everything you could wish for in providing a first class service. He transformed our badly soiled mouldy shower unit into a sparkling white finish. The job entailed re... See more

Company replied

Company details

  1. Construction Company
  2. Building Inspector
  3. Construction and Maintenance Office
  4. Consultant
  5. General Contractor
  6. Property Maintenance

Written by the company

Professional joint sealant application. We offer high quality sealant works in and around central Scotland, with over 9 years in the industry. We specialise in removal, new build, renovation, bathrooms, kitchens, commercial and domestic.


Contact info

4.6

Excellent

TrustScore 4.5 out of 5

32 reviews

5-star
4-star
3-star
2-star
1-star

Replied to 100% of negative reviews

Typically replies within 24 hours

How this company uses Trustpilot

See how their reviews and ratings are sourced, scored, and moderated.

Companies on Trustpilot aren't allowed to offer incentives or pay to hide reviews. Reviews are the opinions of individual users and not of Trustpilot. Read more

Rated 5 out of 5 stars

Sealing external windows

The quote I received for the work was fair and reasonable. The workmen turned up on time and did an excellent job of sealing my windows.
I would have no hesitation in recommending the Company for sealant work.

14 May 2026
Unprompted review
Rated 5 out of 5 stars

Brilliant job throughout

Absolutely the best company we've worked with in a full house renovation. John was amazing from start to finish. Great communication throughout, turned up in time, did an excellent job sealing our kitchen and bathroom - he even had every colour under the sun available to correctly match different units. John was kind and personable, and went out of his way to fix another small area we had overlooked. Highly recommended!

24 January 2026
Unprompted review
Rated 1 out of 5 stars

DO NOT USE THIS COMPANY !!!

DO NOT USE THIS COMPANY !!!

After reading the reviews I felt reassured to use John Cairney but they must be false reviews as my experience was awful.

Turned up 1 hour late for our appointment without any courtesy call. Poor attitude when he walked in my house but I tried to look past this as I needed my bath resealed. After job was done I told pointed out areas of his work that I wasn’t happy with and instead of fixing it he was very rude and abrupt so I just paid him to get him out my house.

Never…again !!!!

7 January 2026
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

This is a fake review.

We have never done any work for you Debbie. We know every single customer we work for and you are not one of them.

Rated 5 out of 5 stars

What a brilliant service

What a brilliant service. John came and quoted and booked me in. Turned up on time, left a clean job. I have my bathroom resealed and windows.
My bathroom looks like it’s new. Absolutely delighted

11 December 2025
Unprompted review
Rated 5 out of 5 stars

High Quality, friendly and professional service

John and his team were so accommodating with my request, at short notice, to re-do the sealant in both the bathroom and kitchen. Him and his team completed the work to a very high standard. Thank you! Would recommend G1 Sealant to everyone.

12 September 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

I appreciate your kind words Phoebe.

Rated 5 out of 5 stars

Amazing job carried out

John has been fantastic to deal with, from initial contact to having job done. Couldn’t fault him at all. Work carried out to a very high standard. Looking forward to having him come back to do more in future. Would have absolutely no hesitation in recommending him

20 September 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

Thank you very much Colleen.

Rated 5 out of 5 stars

Fantastic Company

John Cairney of this company is everything you could wish for in providing a first class service. He transformed our badly soiled mouldy shower unit into a sparkling white finish. The job entailed removing dirty worn anti slip sticky pads, cleaning up the residual mess then applying sealant to the shower base. The result is spectacular.
John is also a good communicator in contacting me promptly, giving a reasonable price & arranging a day to provide the service. How refreshing it is to find a company like this & I highly recommend him. My thanks to John & his associate.

15 September 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

Thank you very much for your kind words Sandra. It was a pleasure

Rated 5 out of 5 stars

Great service

Fast response. Great service. Job looks great. Would definitely recommend.

17 September 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

I appreciate your feedback

Rated 5 out of 5 stars

Great Job!

The team did a fantastic job and my shower looks like new. We are very happy and we would definitely recommend!

8 September 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

Thank you

Rated 5 out of 5 stars

Window mastic replacement

After contacting John about draughts coming in from multiple windows, he was able to identify breaks in the existing mastic sealant. Once identified, these were actually easy to spot.
We booked a suitable date and had the sealant replaced around all top floor windows on the house and most of the downstairs. John even replaced the sealant around a door free of charge!
He arrived when he said he would, tidied up afterwards and now we will have a leak free and draught free home in time for the cooler months coming.
Overall, we had a great experience and wouldn't hesitate to recommend G1 sealant.

1 September 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

Thank you very much. This winter should be a lot warmer now.

Rated 5 out of 5 stars

Quick response to help my Mother in law.

John helped seal my Mother-in-laws garage after I was let down by a previous contractor.
He was quick to respond, helpful and arrived as planned and let my WiL know in advance.
Great service and happy to recommend.

25 August 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

Thank you Darroch

Rated 5 out of 5 stars

Friendly

Friendly, efficient, thoughtful and did a great job. Couldn't have asked for more. Highly recommended.

25 August 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

Thank you John

Rated 5 out of 5 stars

Replacement Sealant

I needed the sealant in my shower removed and replaced. John was recommended and he arrived on the date agreed, bang on time. His work is first rate and he left the job spotlessly clean. I am more than delighted with the results. I would highly recommend John and will definitely use him again.

19 August 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

Thank you for your kind words Joan

Rated 5 out of 5 stars

Exceeded expectations

I booked John in for the next availability he had a couple weeks later to reseal my shower unit. I didn't have high expectations of him showing simply as been let down so many times with other workies. John was very prompt and arrived when he said he would and it made me nervous as I left my husband at home that day as I was at work and again didn't have high hopes for a great job 😂. When I got home I was so happy that the work that was done, it exceeded my expectations and the attention to detail...wow - everything was perfect!

11 August 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

We're always trying to exceed expectations. Thank you for booking in Lisa

Rated 5 out of 5 stars

Excellent

Excellent
Johns a lovely guy done a great job wouldn’t hesitate getting him back for more jobs!

6 August 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

Thank you very much

Rated 5 out of 5 stars

Bathroom Resealed

I called upon G1 Sealant to reseal my bathroom due to a very bad experience I had with a previous sealant company who not only did a poor job but had also damaged my shower tray too. John came out & done a fantastic job. I was delighted with the result’s. He is very meticulous on what he does. I would 100% recommend G1 Sealant to friends & family & I’ll be getting John back again soon to do my kitchen too.

30 July 2025
Unprompted review
G1 Sealant logo

Reply from G1 Sealant

Glad you finally got the quality you were looking for Susan

The Trustpilot Experience

Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.

Companies can ask for reviews via automatic invitations. Labeled Verified, they’re about genuine experiences.

Learn more about other kinds of reviews.

We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.

Learn about Trustpilot’s review process.

Here are 8 tips for writing great reviews.

Verification can help ensure real people are writing the reviews you read on Trustpilot.

Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.

Take a closer look