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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 Sunday, May 10
Order within 8 hours and 21 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: Sunday, May 10

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

    • 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
    • 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
    • packaged well quick shipping
Color: Rosin Paste
works on lead and non leaded solder I used on both types of solder with excellent results good price i found less is best I did clean solder joints once cooled I noted container which solder comes in looks to be robust for storage. If needed I'll buy this brand again
Reviewed in the United States on March 14, 2026 by Rich
    • Seems fine. Had other issues
Color: Rosin Paste
Seemed to work fine. But has issues with the quality of metal so couldn't get a good solder. But I don't think it was a fault of this solder.
Reviewed in the United States on August 3, 2025 by Jimmy
    • 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
    • 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
    • Provides great solder flow for a secure electrical connection
Color: Rosin Paste
Works great. I use it frequently on small electronics and i provides great flow for a solid electrical connection.
Reviewed in the United States on February 20, 2026 by Mark F.
    • Great product
Color: Rosin Paste
Works as intended
Reviewed in the United States on February 17, 2026 by john barber

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