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.
Arrives
Monday, Oct 5
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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
Color: Rosin Paste
Style: Rosin Flux
Material: Rosin
Item Package Quantity: 1
Cutting Diameter: 2.5 inches
Included Components: jar of flux
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, Oct 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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Rosin Paste
This is probably the best flux paste I've used. I've been an electronics technician for almost 50 years and I have not found a better paste flux for tinning tips and wires. I had to repair the wiring on my lift chair hand control which required tinning several wires. Just a tiny amount made the iron tip clean and let the solder flow smoothly. I had worked for OEM and contract manufacturers that never had this grade of paste. Don't buy the cheap stuff. If you do, you will probably use twice as much with questionable results. Spend a little more for this, you'll be glad you did.
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Reviewed in the United States on May 19, 2026 by Jay C Beasley
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.
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Reviewed in the United States on January 30, 2026 by Kristopher Richardson
Color: Rosin Paste
Should've bought 2 this is good quality rosin flux.
Reviewed in the United States on September 3, 2026 by Ty
Color: Rosin Paste
There's almost no stickiness, it's a thick paste, so it may be a bit tricky to apply accurately, this can make your accuracy a bit off, it's quick and easy use most of the time, and the container comes in a pretty decent sized jar. accuracy
Reviewed in the United States on January 30, 2026 by Joshua Holmes
Color: Rosin Paste
Awesome product great quality will definitely buy again well worth the price
Reviewed in the United States on September 10, 2026 by Louis R
Color: Rosin Paste
Doesn’t eat wires. Works well with different kinds of solder and at different temperatures. Easier to clean off than other brands I’ve tried.
Reviewed in the United States on July 31, 2026 by Astro-Man
Color: Rosin Paste
I don’t do too much solder repair, but I’ve learned that you need the proper tools and equipment to perform the job adequately, whether that be a new or repaired solder joint. Keep in mind, the only repairs I work on are mostly car related, for example, when capacitors or resistors go bad. This flux works well in those applications, simply brush a little on, and it helps clean and create a good solder joint.
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Reviewed in the United States on July 12, 2026 by Mike in PA
Color: Rosin Paste
Glad it's not corrosive! Works well for simple soldering of my projects. I am by no way a soldier guy with a soldering station and adjustable iron. I haven't done enough to compare to other brands. That said I used to to soldiers some wires and it helped it stick.
Reviewed in the United States on August 17, 2026 by John Smith