--- product_id: 279505822 title: "Saint-Gobain ADFORS FSP8521-U 100' Spline, .125 in X 100 ft, Black, Foot" brand: "saint-gobain adfors" price: "$34.02" currency: USD in_stock: true reviews_count: 5 category: "Saint Gobain Adfors" url: https://www.desertcart.us/products/279505822-saint-gobain-adfors-fsp8521-u-100-spline-125-in-x store_origin: US region: United States of America --- # 100 ft continuous length sleek black color for seamless finish Saint-Gobain ADFORS FSP8521-U 100' Spline, .125 in X 100 ft, Black, Foot **Brand:** saint-gobain adfors **Price:** $34.02 **Availability:** βœ… In Stock ## Summary > πŸ–€ Lock in your view with the sleekest spline in the game! ## Quick Answers - **What is this?** Saint-Gobain ADFORS FSP8521-U 100' Spline, .125 in X 100 ft, Black, Foot by saint-gobain adfors - **How much does it cost?** $34.02 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/279505822-saint-gobain-adfors-fsp8521-u-100-spline-125-in-x) ## Best For - saint-gobain adfors enthusiasts ## Why This Product - Trusted saint-gobain adfors brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Durability Meets Style:** Black color spline not only blends discreetly with frames but also resists wear, keeping your screens looking sharp and secure. - β€’ **Effortless Installation:** Flexible yet sturdy design allows quick, smooth insertion into frame channels, saving you time and frustration. - β€’ **Versatile Compatibility:** Works seamlessly with all ADFORS screens including Pet Polyester, Solar, and Aluminum, making it the go-to choice for professionals. - β€’ **Precision Fit for Every Frame:** 0.125 inch diameter spline designed to perfectly secure screens in 5/16” x ¾” frames, ensuring a flawless installation every time. - β€’ **Unmatched Length for Big Projects:** 100 feet of durable, flexible PVC spline means you’re ready to tackle any screening job without constant reordering. ## Overview Saint-Gobain ADFORS FSP8521-U is a 0.125 inch diameter, 100-foot long black flexible PVC spline designed to securely fasten insect screens into 5/16” x ¾” window frames. Compatible with a variety of ADFORS screens including pet, solar, and aluminum types, it offers professional-grade durability and ease of installation, making it a top choice for both DIYers and pros. ## Description From the manufacturer Spline Spline is the β€œglue” that holds a good screening project together. Pairing the correct spline size and color will ensure your screens go in smoothly and look great. Get Everything You Need Review: No problems installing - Got this spline to install a "pet defense" screen on a patio door. The plastic screen is thicker but this spline worked perfectly. Review: Excellent spline , durable, thinner than average splines and cost way better than other providers - Handyman and myself happy with purchase as hardware store, big box stores don’t carry this size of spline .125inch x 100 ft for old type window screens ! Especially for installing pet screens which are thicker than most screens! Kudos to desertcart.ca for having this product in stock! I had this type of spline many years ago! ## Features - 0.125 inch x 100 foot - Secures screen into frame channel - Easy to use - Can be used with all types of insect screening - This spline is suitable for l for screens such as ADFORS Pet Polyester Screen, ADFORS Solar Screen, and ADFORS Aluminum Screen when working with when working with a 5/16” x ¾” Frame ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00GWU82WK | | Best Sellers Rank | #52,690 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3 in Window Screen Splines | | Brand | Saint-Gobain ADFORS | | Brand Name | Saint-Gobain ADFORS | | Color | Black | | Colour | Black | | Customer Reviews | 4.6 out of 5 stars 9,570 Reviews | | Global Trade Identification Number | 00011646701756 | | Included Components | Saint-gobain ADFORS Spline, 125 in X 100 ft, Black | | Item Type Name | Spline | | Manufacturer | Saint-Gobain ADFORS | | Material | Flexible PVC | | Material Type | Flexible PVC | | Model | FSP8521-U | | No. of wires | 1 | | Number Of Wires | 1 | | Number of Items | 1 | | Number of cable strands | 1 | | Part Number | FCS8521-U | | Strands | 1 | | UPC | 011646701756 | | Unit Count | 100 Meters | | Wire Diameter | 0.13 Inches | ## Product Details - **Brand:** Saint-Gobain ADFORS - **Colour:** Black - **Material:** Flexible PVC - **No. of wires:** 1 - **Number of cable strands:** 1 ## Images ![Saint-Gobain ADFORS FSP8521-U 100' Spline, .125 in X 100 ft, Black, Foot - Image 1](https://m.media-amazon.com/images/I/81idxKikMuL.jpg) ![Saint-Gobain ADFORS FSP8521-U 100' Spline, .125 in X 100 ft, Black, Foot - Image 2](https://m.media-amazon.com/images/I/817kq-AMGdL.jpg) ![Saint-Gobain ADFORS FSP8521-U 100' Spline, .125 in X 100 ft, Black, Foot - Image 3](https://m.media-amazon.com/images/I/61FsUliqenL.jpg) ![Saint-Gobain ADFORS FSP8521-U 100' Spline, .125 in X 100 ft, Black, Foot - Image 4](https://m.media-amazon.com/images/I/91N507169xL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: My screen has a spline groove that's about 1/4 inch. What size spline do I need?** A: 1/4th inch would be .250 inches. I suggest that you pull a small piece out and take it with you to your local hardware store to compare. About 1/4 inch is not a close enough measurement. I had several screens (I think 6 screens) that were "about" 1/8 inch. I found that there were three different sizes in the mix even though they "looked" to be "about" the same. **Q: do i need to downsize the spline to install a longer lasting aluminum screen?** A: Amazon sent me your q since I recently bought this product. Check your screen to see if it currently has spline. If so you need to go ahead and get replacement. You might could use the the old but chances are it will rip enemies extracting, not last much longer, look lousy vs the new screen or all of the above. **Q: What size spline do I need for a 5mm slot?** A: .125"=.32cm. and that will work on US screen s. **Q: What are the dimensions of the spline?** A: The latest version of this spline I received is .097" thick and .298" wide. This is flexible spline and works well in my 18 year old screen room which takes more narrow spline than what is currently being sold at Lowe's and Home Depot. ## Customer Reviews ### ⭐⭐⭐⭐⭐ No problems installing *by U***A on 7 July 2024* Got this spline to install a "pet defense" screen on a patio door. The plastic screen is thicker but this spline worked perfectly. ### ⭐⭐⭐⭐⭐ Excellent spline , durable, thinner than average splines and cost way better than other providers *by J***B on 10 October 2025* Handyman and myself happy with purchase as hardware store, big box stores don’t carry this size of spline .125inch x 100 ft for old type window screens ! Especially for installing pet screens which are thicker than most screens! Kudos to Amazon.ca for having this product in stock! I had this type of spline many years ago! ### ⭐⭐⭐⭐⭐ Tough, Flexible and Consistent *by A***R on 21 May 2026* This is the right product for the job, have used two of these 100ft packs to replace all the screens on my house. Far better value than the smaller packs at the hardware store. It's tough yet flexible and always consistent, easily handling the fussy bits like working around the corners, the locating pegs and the puller where things can get a bit tight and fiddly. Choose the right size for your screen frames and this product will consistently create and hold the right tension during installation to make your new screen mesh look flawless. ## Frequently Bought Together - Saint-Gobain ADFORS FSP8521-U 100' Spline, .125 in X 100 ft, Black, Foot - Prime-Line P 7505 Screen Rolling Tool – A Must Have Tool for Installing Window and Door Screens – Spline Roller with Wood Handle and Steel Wheels – Durable and Easy to Use (Single Pack) - Fiberglass Screen Roll High Visibility and Durable Screen Easy to DIY Repair or Rescreen Window and Door Screen --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/279505822-saint-gobain-adfors-fsp8521-u-100-spline-125-in-x](https://www.desertcart.us/products/279505822-saint-gobain-adfors-fsp8521-u-100-spline-125-in-x) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-31*