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Sra Rosin Paste Flux #135 In A 2 oz Jar

4.8 out of 5 stars 1,592 ratings
Amazon's Choice recommends highly rated and well-priced products.
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Price: $8.99 FREE Shipping
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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)
  • Does not need to be cleaned
  • Active temperature range: 93 – 315°c/ 200 – 600°
  • Made in USA
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Easy to use
4.7 4.7
Value for money
4.7 4.7
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4.5 4.5

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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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Customer Rating 5 out of 5 stars (1379) 4 out of 5 stars (586) 4 out of 5 stars (761) 4 out of 5 stars (58) 4 out of 5 stars (50) 4 out of 5 stars (176)
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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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4.8 out of 5 stars
4.8 out of 5
1,592 customer ratings
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Top international reviews

DazGood
1.0 out of 5 stars Not a good product. Almost useless as a flux.
Reviewed in Canada on March 25, 2018
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4 people found this helpful
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CrisA
4.0 out of 5 stars It's pretty good. No real complaints.
Reviewed in Canada on February 27, 2018
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2 people found this helpful
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F. Leblanc
5.0 out of 5 stars Will definitely help your soldering
Reviewed in Canada on July 29, 2018
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One person found this helpful
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Ryan F
5.0 out of 5 stars Good flux at a good price
Reviewed in Canada on March 17, 2017
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Freddy
2.0 out of 5 stars barely works
Reviewed in Canada on August 14, 2018
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iamike
4.0 out of 5 stars Hard like bees wax!
Reviewed in Canada on March 28, 2019
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3 people found this helpful
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bbmstang
2.0 out of 5 stars too hard
Reviewed in Canada on August 4, 2018
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Nukemaster
4.0 out of 5 stars Helps solder flow and stick.
Reviewed in Canada on August 2, 2018
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Gary Ward
5.0 out of 5 stars Good product made life easy.
Reviewed in Canada on August 18, 2019
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Glenn Matthiesen
5.0 out of 5 stars Excellent Product
Reviewed in Canada on May 22, 2019
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Sayajiin
5.0 out of 5 stars Five Stars
Reviewed in Canada on April 8, 2018
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Amazon Customer
5.0 out of 5 stars Great stuff!
Reviewed in Canada on April 10, 2019
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Riadh Bouhsine
1.0 out of 5 stars Contenant déjà utilisé
Reviewed in Canada on February 22, 2020
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Cliente
1.0 out of 5 stars no muy bueno
Reviewed in Mexico on April 30, 2019
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R. Woof
5.0 out of 5 stars Good product.
Reviewed in Canada on June 5, 2017
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