Search  for anything...

Smartline Boulder Swirl 18-Foot Round Liner | UniBead Style | 52-Inch Wall Height | 25 Gauge Virgin Vinyl Material | Strong and Durable Liners | Designed for Steel Sided above-Ground Swimming Pools

  • Based on 175 reviews
Condition: New
Checking for product changes
$329.99 Why this price?
Save $350.00 was $679.99

Buy Now, Pay Later


As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Only 9 left in stock, order soon!
Fulfilled by Save More On Pool Supplies

Arrives Jun 29 – Jul 5
Order within 16 hours and 4 minutes
Available payment plans shown during checkout

Material Type: 25 Gauge


Color: Boulder Swirl


Features

  • MEASURE TWICE, BUY ONCE Whether installing for the first time, or replacing an existing liner, the Boulder Swirl pattern offers durability while not breaking the bank. Be sure to check the measurements of your swimming pool to assure the correct size is purchased. Pool height is determined by measuring the outside wall from the ground to underneath the top rail. Round pool size is determined by measuring from the center point wall to wall in order to obtain the diameter.
  • INSTALL IN A SNAP OR A HOOK - This 18' round unibead style liner works with pools with flat-bottoms measuring 52". For an overlap style pool, simply open up the j-hook portion and slip this over the pool wall. For beaded style pools, use the standard bead after removing the j-hook portion along the score or groove mark. This will leave only the standard bead which is inserted into the bead receiver opening. ***Will not work with Intex or Pop-Up pools***
  • STAY COOL IN THE POOL Enjoy the warm weather while spending quality time with family and friends. Your backyard pool will surely become the place to be during those hot summer days. Stay cool in more ways than one with the Boulder Swirl liner.
  • HIGH QUALITY MATERIAL - Swim carefree knowing your liner can tough it out through abrasion, chemicals and UV fading thanks to the use of Lamiclear technology. The layers are made of an acrylic top coat, a UV resistant print layer, and a 100% virgin vinyl base. This material is then welded and cut for a flawless fit and finish. A 25-year limited warranty is included protecting against defects in material and workmanship.

Product Dimensions: 1 x 1 x 1 inches


Item Weight: 50 pounds


Manufacturer: Swimline


Item model number: LI1852BSU25


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jun 29 – Jul 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Good Quality liner!
This is a really good quality liner, My husband and I installed it ourselves and it turned out perfect ! We also bought a roll of wall insulation that is behind it as well as a black liner for under the bottom .. We had all our grandchildren in it the first summer and it Seems pretty durable!!! We are opening for our 2nd summer we will see how it holds up! It also is a pretty blue color! Lots of work but I'm satisfied. ... show more
Reviewed in the United States on May 14, 2024 by Peggy and Mike Peggy and Mike

  • installed easaly
Material Type: 25 Gauge Color: Stone Harbor
Exactly what I paid for. Easy to install.
Reviewed in the United States on June 14, 2024 by Ray Peters

  • Pool liner
Material Type: 25 Gauge Color: Mystri Gold
What a terrific find !! Less expensive than pool companies by hundreds of dollars!
Reviewed in the United States on April 29, 2024 by Joanne Gustina

  • Very good
We had to road the line on our pool die to a leak. This one was great! Nice quality, it has clips at the top so we didn't have to fold over. I recommend.
Reviewed in the United States on June 12, 2024 by The Roberts Family The Roberts Family

  • great price, and well made
Material Type: 25 Gauge Color: Tuscan
Prompt delivery, great price, and well made. No complaints. I installed this liner as a j hook on my 18' round, 52" deep pool. It fit perfectly and looks great. And the best part, its holding the water unlike my old leaky liner. I also purchased some foam cove strips and that really made the installation smooth and look like a million bucks. ... show more
Reviewed in the United States on June 15, 2016 by Jon

  • Pool
Material Type: 25 Gauge Color: Boulder Swirl
Thicker liner than we had
Reviewed in the United States on May 22, 2024 by Randall Moon

  • Beautiful colors
Material Type: 25 Gauge Color: Boulder Swirl
Liner arrived quickly. We’ll packaged. Went in and fit perfectly. We couldn’t be happier.
Reviewed in the United States on June 23, 2022 by Jane Jeter Jane Jeter

  • Exactly as I had hoped it would be
Material Type: 25 Gauge Color: Mosaic Diamond
The pool liner was perfect and exactly what I had hoped it would be. Fit perfectly and was easy to install and shipping was as we were quoted! Perfect you all - thank you
Reviewed in the United States on July 16, 2020 by Beverly Schissler

Can't find a product?

Find it on Amazon first, then paste the link below.