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SRA Soldering Products

SRA Solder 135 Rosin Paste Soldering Flux For Electronics, No Clean Flux Made for Lead and Lead-Free Solder Circuit Boards and Copper Electrical Wire - Safe Clean Residues with No Goopy Mess (2oz Jar)

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Mar 23
Order within 18 hours and 30 minutes
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Color: Rosin Paste


Features

  • USA Quality Flux - Achieve the soldering results you desire with SRA 135. Our rosin paste flux is impurity free with superior solder flux paste wetting performance. Rosin flux soldering perfected.
  • No Goop Solder Flux - Semi-solid solder wax consistency gives you superior control over application. Simply dip copper electric wires or apply electronic rosin flux to PCB and watch the solder flow!
  • Electric Solder Flux - Unlike paste flux wax found at the hardware store, SRA 135 acid free electronics soldering flux is the safe and effective choice for electrical and electronic applications.
  • Flux Specifications - 135 is a type RA (Rosen Activated) Flux with an Active Temp. Range of 93 315C / 200 600F. This listing is for one 2oz (56.6g) jar of electrical flux paste.
  • Flux for soldering DIY electronics projects including Car Audio, Stereo & Hifi, Computers, RC Vehicles, Drones / FPV, Musical Instruments, Gaming Consoles, Model Railroad, Arduino / Raspberry Pi, etc.

Description

This petroleum/rosin contains No Zinc chloride or ammonium chloride, making it a better choice for electronic repairs. Rosin leaves a protective coating over soldered area Once job is finished

Manufacturer: ‎SRA Soldering Products


Part Number: ‎135


Item Weight: ‎2 ounces


Item model number: ‎FLS135


Is Discontinued By Manufacturer: ‎No


Color: ‎Rosin Paste


Style: ‎Rosin Flux


Material: ‎lead


Item Package Quantity: ‎1


Cutting Diameter: ‎2.5 Inches


Included Components: ‎jar of flux


Batteries Included?: ‎No


Batteries Required?: ‎No


Assembled Diameter: ‎2.5 Inches


Date First Available: August 19, 2012


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Mar 23

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.

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Top Amazon Reviews

    • Awesome product great quality and quantity
Color: Rosin Paste
You get so much for so cheap. Works well and joins the solder perfectly.
Reviewed in the United States on December 31, 2025 by Brad Alger
    • Accurate great quantity helps create stronger bonds!
Color: Rosin Paste
The quantity of this product is amazing for the price. You only need a very small amount to get most jobs done, so this will last me quite a while. This is so easy to use and works fast. It’s not too thick and not too thin rather just right. I used this product to help me clean the ends of a tape measure I sanded for my ham radio tape measure antenna. This enabled me to solder the cable wires to the tape measure with ease. The joint bonded much stronger with the use of this flux. I highly recommend this for both those new to soldering and seasoned soldering experts. ... show more
Reviewed in the United States on January 30, 2026 by Kristopher Richardson
    • Very good and long lasting flux
Color: Rosin Paste
I bought this to build drones... It may just last forever due to a micro dose being more than plenty for wires 12-30 AWG. Its sticky, perfect for joints and pads and doesn't leave nasty smells.
Reviewed in the United States on January 7, 2026 by Emmanuel
    • Soldering
Color: Rosin Paste
Works will, easy to apply
Reviewed in the United States on January 13, 2026 by clifford w.
    • Recommend
Color: Rosin Paste
High quality and tested it with some of my projects and they work perfectly.
Reviewed in the United States on January 7, 2026 by Kanoa N.
    • Rosin paste soldering paste flux.
Color: Rosin Paste
The rosin paste soldering flux is good. This is what I was looking for.
Reviewed in the United States on February 12, 2026 by Good to go
    • Great product!
Color: Rosin Paste
This works great. I use it all the time. I would recommend it to anybody.
Reviewed in the United States on January 2, 2026 by JefferyWilson
    • Gets the job done
Color: Rosin Paste
Works well for general soldering needs
Reviewed in the United States on February 13, 2026 by Andrew Newcomb

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