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SRA Soldering Products Rosin Paste Flux #135 In A 2 oz Jar

4.7 out of 5 stars 12,368 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Soldering Flux by SRA Soldering Products

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Rosin Paste

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  • The Ideal Flux For Electrical And Electronic Repairs
  • Contains 2 Ounce In A "Hockey Puck" Jar
  • Formulated For Use With Tin/Lead And Lead-Free Alloys
  • Dimensions: 2.5″ Dia X 1″ H (64 X 25.5 Mm)
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Additional Details

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Customer ratings by feature

Easy to use
4.5 4.5
Easy to clean
4.5 4.5
Value for money
4.5 4.5
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Buy it with

  • SRA Soldering Products Rosin Paste Flux #135 In A 2 oz Jar
  • +
  • Thermaltronics TMT-TC-2 Lead Free Tip Tinner (20g) in 0.8oz Container
  • +
  • NTE Electronics SW02-10 No-Clean Solder Wick, 4 Blue.098" Width, 10' Length
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What's in the box

  • jar of flux

  • From the manufacturer

    Frequently Asked Questions (FAQs)

    Is it effective when working to simply dip the solder wire into the flux and solder or is it significantly better to apply to the joint and why? You want to apply the right amount of flux. Too little and you won’t get good soldering results. Too much and you run the risk of the solder flowing where you don’t want it to, since solder follows flux. You want to apply the flux in the manner that will best ensure you lay down the right amount. Usually this means using a tool to apply the flux to the area being soldered and not dipping the part into the #135. SRA #135 is not runny, and if you dip the part into the flux, you might not get enough flux on it. That being said, I am sure there are people who do dip their part into the #135 flux and get good results.

    Is it advisable to heat up the flux with a heat gun if it is too hard/solid? You would want to do this very carefully since you don’t want the ingredients in the flux to separate. Quick, intense heat could cause the flux to separate into disparate ingredients. While this is not too likely, it can happen.

    If the rosin flux becomes dry is there anything you can do to return it to more of a paste? You would want to gently heat it until it softens up, but you need to be careful not to heat it up too quickly or at too high of a temperature.

    Does dipping your soldering iron directly into the flux help keep the tip clean, are there any benefits? Not a great idea. It wouldn’t be good for the solder iron because if you get too much rosin on a solder iron, it can be hard to clean off. Also, it can cause the flux to separate. Better to put the flux on the part that you are soldering, and to then apply the solder wire and solder iron to the area where the flux is. Of course, the solder iron will usually contact the flux, but you don’t want to 'bathe' the soldering iron inside the flux by sticking it in the flux jar.

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    Item Dimensions 3 x 1 x 3 inches 4 x 1 x 5 inches 2.5 x 2.5 x 1.5 inches 3 x 3 x 0.63 inches 2.5 x 2.5 x 1 inches

    Product 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

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    Customer reviews

    4.7 out of 5 stars
    4.7 out of 5
    12,368 global ratings

    Top reviews from the United States

    Reviewed in the United States on May 27, 2017
    Color: Rosin PasteVerified Purchase
    268 people found this helpful
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    Reviewed in the United States on August 23, 2018
    Color: Rosin PasteVerified Purchase
    82 people found this helpful
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    Reviewed in the United States on September 30, 2016
    Color: Rosin PasteVerified Purchase
    66 people found this helpful
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    Reviewed in the United States on January 1, 2019
    Color: Rosin PasteVerified Purchase
    24 people found this helpful
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    Reviewed in the United States on May 7, 2016
    Color: Rosin PasteVerified Purchase
    44 people found this helpful
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    Top reviews from other countries

    Dimitry
    5.0 out of 5 stars Superb quality but best used with a syringe
    Reviewed in the United Kingdom on March 21, 2021
    Color: Rosin PasteVerified Purchase
    Ryu Haduken
    5.0 out of 5 stars Does all that you will need in a flux!
    Reviewed in Canada on August 5, 2021
    Color: Rosin PasteVerified Purchase
    Customer image
    Ryu Haduken
    5.0 out of 5 stars Does all that you will need in a flux!
    Reviewed in Canada on August 5, 2021
    Good when you warm it up; leave it in the sun for like a minute. Then it becomes pliable to work with. Otherwise leave it inside the house or somewhere warm. Smell is strong. But if you have a fan exhaust no problems. I just ripped out a fan from an old pc. Cut out the shape of a box bigger than the fan. Cut a hole for exhausted with a cloth for filter. Silicon up all holes/seams. Was easier than making a 3d printed one.
    Images in this review
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    3 people found this helpful
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    dtb
    4.0 out of 5 stars Nice
    Reviewed in Canada on March 6, 2021
    Color: Rosin PasteVerified Purchase
    2 people found this helpful
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    DazGood
    1.0 out of 5 stars Not a good product. Almost useless as a flux.
    Reviewed in Canada on March 25, 2018
    Color: Rosin PasteVerified Purchase
    5 people found this helpful
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    Invisible Man
    1.0 out of 5 stars Difficult to apply and very strong smell
    Reviewed in Canada on July 28, 2021
    Color: Rosin PasteVerified Purchase
    One person found this helpful
    Report abuse