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โก Solder smarter, not messierโflux that flows with your precision.
SRA Solder 135 Rosin Paste Flux is a premium, acid-free soldering flux designed for electronics and electrical wiring. Its semi-solid consistency offers precise application without goopy mess, ensuring clean, reliable solder joints across a wide temperature range (93โ315ยฐC). Trusted by professionals and DIYers alike, this 2oz jar delivers impurity-free, USA-made quality ideal for circuit boards, copper wires, and diverse electronics projects.



















| ASIN | B008ZIV85A |
| Assembled Diameter | 2.5 inches |
| Best Sellers Rank | #854 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Soldering Flux |
| Color | Rosin Paste |
| Customer Reviews | 4.7 4.7 out of 5 stars (18,220) |
| Cutting Diameter | 2.5 inches |
| Date First Available | August 19, 2012 |
| Included Components | jar of flux |
| Item Package Quantity | 1 |
| Item Weight | 2 ounces |
| Item model number | FLS135 |
| Manufacturer | SRA Soldering Products |
| Material | Rosin |
| Part Number | 135 |
| Style | Rosin Flux |
M**A
An Essential Tool when Soldering
I donโt do too much solder repair, but Iโve 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.
K**T
SRA Rosin Paste Solder, it really works!
SRA soldering paste is the best I've ever used. It facilitates wetting multi-stranded wire when pre-tinning the soldering connection. It also provides better adhesion, without increasing soldering iron temperature. Great job SRA and great product.
J**H
JPh
Good.
N**A
Works as expected
It works , help solder component to circuit board. Small size which is good easy to pack. Still need to use alcohol to clean the soldered area if you need to make sure it looks really nice. For the price it's good.
K**N
Accurate great quantity helps create stronger bonds!
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. Itโs 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.
M**W
Works well. Priced right.
No complaints. Works great. Price is good.
J**Y
Clean and smooth
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.
S**L
Just what I needed
worked perfect
S**T
Quality flux
This is good flux
M**8
ู ูุชุฌ ุงุตูู ูููุนูุฉ ู ู ุชุงุฒุฉ
ููุนูุฉ ุงุตููุฉ ูู ู ุชุงุฒ
D**Y
Superb quality but best used with a syringe
I used one of those cheap fluxes and boy oh boy what a difference! However it's best to use it by putting it first into a syrnge equipped with a hollow needle of about 0.7 - 1 mm inner hole diameter. That will help immensely with the application
R**A
Excelente
Excelente
L**N
Good Hobby Rosin
This rosin paste flux works well for soldering. It helps the solder flow smoothly, resulting in clean joints. The jar size is good for my hobby use.
Trustpilot
1 month ago
5 days ago