How To Fix Blisters In Fiberglass Pools

April 17, 2025

Fiberglass pools are an increasingly popular choice for homeowners due to their durability, low maintenance and overall aesthetics. However, like any other pool, they’re not immune to problems. One issue that can arise with fiberglass pools is the formation of blisters. Blisters are bumps or bubbles that form on the surface of the pool and they can be caused by a variety of factors including improper installation, water chemistry imbalances or manufacturing defects.


If you’ve noticed blisters on your fiberglass pool, don’t panic! In this blog, we’ll provide you with a step-by-step guide on how to fix blisters to restore your pool’s appearance.

Table of Contents

Step 1: Drain The Pool

The first step in fixing blisters in your fiberglass pool is to drain the water. You can use a submersible pump to remove the water from the pool. Be sure to turn off the power to the pool equipment before you begin draining the water.

Step 2: Identify The Blisters

Once the pool is drained, you can begin to identify the blisters. Blisters can range in size and depth and can be located on any part of the pool’s surface. Use a marker to circle each blister, so you know where to focus your repair efforts.

Step 3: Sand The Blisters

To repair the blisters, you’ll need to sand the affected areas. Use sandpaper or a sanding disc to remove the damaged fiberglass from the pool’s surface. Be sure to wear a dust mask and eye protection while sanding.

Step 4: Remove The Damaged Fiberglass

After sanding the blisters, use a chisel or a grinder to remove any loose or damaged fiberglass. Be careful not to damage the surrounding areas of the pool.

Step 5: Clean The Area

Once you have removed the damaged fiberglass, use a clean cloth to wipe away any debris or dust. It’s important to ensure the area is clean and free of any debris before proceeding to the next step.

Step 6: Apply Fiberglass Resin

Apply a layer of fiberglass resin to the damaged area using a fiberglass brush. Be sure to apply enough resin to completely cover the damaged area. Smooth out the resin with a roller to ensure an even application.

Step 7: Allow The Resin To Cure

Allow the resin to cure for at least 24 hours before proceeding to the next step. It’s essential to give the resin enough time to cure to ensure a strong and durable repair.

Step 8: Sand And Smooth The Repair

After the resin has cured, use a 220-grit sandpaper to sand the repaired area. Sand until the surface is smooth and level with the surrounding areas of the pool.

Step 9: Clean The Area

Use a clean cloth to wipe away any dust or debris from the repaired area.

Step 10: Refill The Pool

Finally, it’s time to refill the pool with water. Once the pool is filled, you can turn on the power to the pool equipment and enjoy your newly repaired fiberglass pool!


Blisters in fiberglass pools can be an unsightly problem but they are easily fixable with the right tools and techniques. If you’re uncomfortable performing the repairs yourself, it’s always a good idea to consult with a professional pool technician who can provide you with additional guidance.


At Gibson Family Pools, we’re committed to providing our customers with the highest level of service and support. Our quality manufacturing and installation services minimise the risk of blisters and other problems with your fiberglass pool, allowing you to maximise the benefits offered by your pool. Contact our team today to learn more.   

Locally family-owned & operated

Simone and Jeremy Tydd, Lake Cathie


Thanks so much for all your help. We are very happy with the pool. It was a very easy process and we will definitely be recommending Gibson Family Pools to others.

Brendan and Catherine Moylan, Moree


A quick note to say thank you for the great job that you and all of the team did for us. The entire process was very smooth and we were extremely happy with the final product. Jayson's suggestions regarding the positioning of the pool and even his landscaping ideas were very much appreciated. Your team were all very professional and courteous during the construction phase, I've never seen such a tidy construction site! The fact that the boys even filled in the small wheel marks on the lawn with top soil when they left highlights the excellent attention to detail that was evident throughout the project. Thanks again for an excellent job and for all of your help.  

Fred and Leilani Garcia,Port Macquarie


We would like to thank Jayson, Katwin and the rest of the team at Gibson Family pools for installing our pool. Jayson listened to what we wanted and his advice and suggestions were to our needs and budget. We had a hassle free experience from day one and the process was made easy as Katwin and Jayson took care of everything from the paperwork, dealing with local council to the installation process. The team were friendly and professional and got the work completed within the time frame given - we praise their efforts given the time of year.

 

 

We will be using Gibson Family Pools for our future property and we highly recommend them above any other local pool installation company. 

Richard and Sheryl, Tamworth


We are really happy with our new pool. Jayson was able to give us great suggestions on how the pool would work best with our house and yard and the travertine tiling around the pool looks fantastic. The entire team were easy to work with and went out of their way to please us.

 

A friend suggested that we contact Jayson and Katwin when we were considering a pool and in turn we have had no hesitation in recommending Gibson Family Pools to our friends. Thank you very much for a great result at a much better price than other quotes we received. 

Robert Wright, Tamworth


I just wanted to take the opportunity to say a big thank you to Jayson and your company for everything that you have done over the last 12 months in the design and implementation of our pool and surrounds. Jayson has been awesome, I like his casual attitude and approach ability, but professional approach to getting the job done. The time he spent with us was invaluable in getting our ideas into reality. The pool has made a massive difference to our lives already, and it is not even summer yet!  

Alan and Annette Bradford, Forster


Thank you Jayson, Katwin and staff of Gibson Family Pools for your totally professional and efficient installation of our new pool. From our first enquiry to the clean up on completion we could not have asked for anything better.

 

We have previously had three pools installed by big name companies who find extras almost every day and don’t turn up when promised. It has been an absolute pleasure dealing with your company and having your staff on site.

Rod and Naomi Miller, Port Macquarie


We have nothing but praise for Gibson Family Pools. We shopped around and couldn't fault their service from the very first email, very first site visit, install and finally through to the after sales service.

 

When the pool was finished you couldn't even tell that large machinery had been used to install the pool, so neat was the installation process. We changed our mind a few times regarding the concrete layout, all changes were accommodated without fuss. Our funds were limited so Katwin and Jayson worked to our budget.  

Rob and Tane Power, Port Macquarie


Just a quick note of thanks for our fantastic new pool. We found the experience to be painless and trouble free. Jayson went out of his way to source a pool that met our requirements and worked with us throughout the whole design and installation process.

 

The new pool area looks great, everything is functioning as it should and I would recommend Gibson Family Pools to anyone considering a new pool.

Lindsay and Bree Moller, Port Macquarie


I just wanted to thank you for our amazing new pool and spa. Choosing the Brooklyn design was the best thing we ever did. The kids just love jumping from the spa to the pool, then wading area and back again. It's like having 3 pools in one. They could honestly do it for hours on end. The hard part is getting them out by the end of the day. The Connect 10 setup with heat pump has been fantastic. We can heat the spa to 37 degrees in just 2-3 hours. I never thought it would be so quick. AMAZING!

 

Thanks again to everyone who worked on it, especially Jayson and his team.  

Simone and Jeremy Tydd, Lake Cathie


Thanks so much for all your help. We are very happy with the pool. It was a very easy process and we will definitely be recommending Gibson Family Pools to others.

Brendan and Catherine Moylan, Moree


A quick note to say thank you for the great job that you and all of the team did for us. The entire process was very smooth and we were extremely happy with the final product. Jayson's suggestions regarding the positioning of the pool and even his landscaping ideas were very much appreciated. Your team were all very professional and courteous during the construction phase, I've never seen such a tidy construction site! The fact that the boys even filled in the small wheel marks on the lawn with top soil when they left highlights the excellent attention to detail that was evident throughout the project. Thanks again for an excellent job and for all of your help.  

Award-winning team

Awarded NSW & ACT Regional 2017

Residential Fibreglass Pool up to $40,000

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