Sailrite® Clear PTFE Lifetime Thread 4 oz. (825 yds.)
SKU: 107128
18 Available


Sailrite® PTFE Lifetime Thread (formerly Profilen®) is a high-performance polymer PTFE (polytetrafluoroethylene) thread that is totally unaffected by sunlight (UV) or nature's harsh elements and comes with a lifetime manufacturer's warranty. While sewing thread generally represents a very small investment in a total project, the weakest part of any canvas project is typically the thread, which eventually rots or weakens to the point of breakage. UV light, as well as elemental factors, attack the thread and tremendously reduces its tenacity over time.

Sailrite PTFE Lifetime Thread has a permanent 100% UV and weather resistance, as well as a "lotus-effect" dirt and water repellency, meaning it has self-cleaning properties due to its high water repellency. The unique characteristics of this PTFE thread mean that it will neither rot nor degrade. Being resistant to salt, microorganisms, bird droppings and most chemicals makes this thread a great choice for canvaswork, awnings, patio umbrellas and so much more. This thread can be used with both oscillating and rotary hook sewing machines. The thread performs very well in rotary hook machines like the Fabricator® Sewing Machine. Please read the section below titled "Important Information Regarding Sewing PTFE Thread" for information regarding oscillating hook machines. Not sure if your sewing machine has an oscillating hook? Learn more in our Rotary vs. Oscillating Hook Sewing Machines blog (#300118XHT).

Extremely resilient and flexible, even in low temperatures, Sailrite PTFE Lifetime Thread has an extremely low coefficient of friction making it highly resistant to abrasion. Although more expensive, this 1500 denier thread is a "Value Added" product — it costs more than other outdoor threads, but not when the costs of lifespan and re-stitching are considered. The manufacturer gives a lifetime guarantee that it will replace any Sailrite PTFE Lifetime Thread which fails in usage due to degradation caused by exposure to sunlight or by degradation caused by atmospheric chemical (pollution) attack.

The base of the cone has a specially designed locking snap closure system to catch and keep the end of the thread contained for easier storage. Simply pull the base open, wrap the thread around the open trench leaving a tail, then push the base bottom to snap the locking system over the thread.

Sailrite Lifetime Thread is similar in size to V-92. We recommend using needle size #14 Round Point (Sharp) needle for mesh fabrics such as Phifertex Plus or shade sail material, and a size #18 DI Leather needle for dense fabrics like Marine Canvas and Awning fabrics and sailcloth. Outdoor thread should pull up off the top of the cone for a smoother feed to the sewing machine.

Important Information Regarding Sewing PTFE Thread:


PTFE thread can be somewhat tricky to sew on any oscillating hook sewing machine. However, we have tested numerous lifetime threads on the market and found that Sailrite PTFE Lifetime Thread performs better than other lifetime threads on the Ultrafeed® Sewing Machine. There is a trial and error process with using this thread. PTFE thread will not perform like polyester and it should not be expected to do so.

You will more than likely experience some skipped stitches when sewing PTFE thread. This is to be expected; its slippery texture kinks, resulting in occasional skipped stitches. Skipped stitches do not compromise the quality or integrity of your sewing assembly. There are no structural concerns with skipped stitches in your seams. Please refer to the video at the bottom of this page for a demonstration of sewing with Sailrite PTFE Lifetime Thread.


  • 100% PTFE (polytetrafluoroethylene)
  • Lifetime Manufacturer Warranty
  • Permanent 100% UV and Weather Resistance
  • Works with Industrial and Semi-Industrial Sewing Machines
  • Dirt and Water Repellent
  • Extreme Resilience/Flexibility, even at low temperatures
  • Non-Flammable
  • Mildew and Rot Proof
  • Fade Proof
  • Chemical Resistant
  • Maximum Heat Resistance 260°C / 500°F
  • Maximum Cold Resistance -200°C / -328°F
  • 1500 Denier
  • Pre-Lubricated
  • Use with a #18 DI needle (for dense fabric) or a #14 Sharp Point needle (for mesh fabric)


Sale Unit: EA
Color: Clear
Brand: Sailrite
Thread Size: V-92 / Tex 90 / Gov. F
Breaking Strength: 7.868 pounds
Elongation: 7%
Cone Size: 4 ounces
Yards per Cone: 825 yards
Warranty: Limited Lifetime

At a Glance

Thread Use: Outdoor



Overall Rating : 4.73 26 Reviews

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Mike Blum
Verified Purchase

Easy to work with, used in constructing a new a new fabric for our retractable awning.

Mary Settle
Verified Purchase


What a blessing for backyard shades. No more re-stitching every year!

Jerome Viviano
Verified Purchase

Good stuff. Too much at too high a price.

Good product. Far more than I need for my project. The price is too high. For your future customers, please find a way to send smaller quantities as lower prices.

Rosie Phillips
Verified Purchase

Used this to re sew all the seams on my bimini as the company who constructed it used a thread that has degraded in less than 3 years. Looking for a life time on this one!
Verified Purchase

I ve used tenara, first time with ptfe , so far,so good!!!..much easier to set tension Bobin (under) last longer

andrew ham
Verified Purchase

Good stuff

Don Connolly
Verified Purchase

Great Product

I was pleasantly surprised by the quality of the thread. It is everything described and I am looking forward to the longevity of the stitch work on my mainsail.

Jeff Reed
Verified Purchase

Great Product

The best product and the cheapest price on the internet too. Use #16 needle.

NJ Sailor

This thread works great !

After sewing projects for 10 years now, and having to restich a mainsail cover or two, I finally decided to change to lifetime thread. Wow, this thread is so easy to use, I had zero skipped stitches, it is so easy to thread the needle because there are no frayed edges on the cut. I don't know about durability yet, but it is a dream to work with. Did not change the tension at all, didn't do a thing to the machine, it just sews like a dream.


Seems to be good thread and easy to use...

I didn't have any problems at all using this thread and I'm fairly new to sewing heavy materials. I did get a couple skipped stitches in the beginning, but that was my fault for not aligning the needle well enough when I installed it. I rotated the needle so it was aligned better and made sure that any error would have the needle turned a little clockwise, as viewed from above. I never had another skipped stitch after adjusting the needle alignment. I used a

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