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SP-7 Silver Solder Paste | Soldering Flux Paste for Electronic Components, Home Improvement, and Wiring | Silver Solder for Jewelry Making and Repair | Lead-Free Solder Flux

3.8 3.8 out of 5 stars 209 ratings
$12.99
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Purchase options and add-ons

  • EASY TO USE: ‍Our silver solder paste syringe offers a no-mess, no-waste way to disperse the soldering paste. It’s designed for easy application.
  • HIGH CONDUCTIVITY: It’s excellent for electrical work and instrument assembly where high electrical conductivity is required.
  • CORROSION-RESISTANT: Our solder flux paste stays bright and doesn't turn black. It makes it ideal for brass, bronze, nickel, stainless steel joints, copper-based metals, and steel.
  • EXTREMELY TOUGH: It has 10,000-25,000 PSI tensile strength, making it 5x stronger than conventional solder wire. It also has a low melting point that allows it to flow smoothly.
  • SETS INSTANTLY: It helps prevent soldering failure due to moving parts while soldering because of the instant setting.
› See more product details

Frequently bought together

Solder-It SP-7 Silver Solder Paste | Soldering Flux Paste for Electronic Components, Home Improvement, and Wiring | Silver So
This item: Solder-It SP-7 Silver Solder Paste | Soldering Flux Paste for Electronic Components, Home Improvement, and Wiring | Silver Solder for Jewelry Making and Repair | Lead-Free Solder Flux
$12.99
Get it as soon as Thursday, Jan 9
In Stock
Sold by JBTools and ships from Amazon Fulfillment.
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Aquiflux Self Pickling Flux for Precious Metals Gold Silver Jewelry and Hard Soldering 8 Oz Megacast (275 ml)
$9.88
Get it as soon as Friday, Jan 3
In Stock
Sold by Atlantic Tools and ships from Amazon Fulfillment.
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Solder-It SP-7 Silver Solder Paste 7.1 Grams | Soldering Flux Paste for Electronic Components, Home Improvement, and Wiring |
$12.99
Get it as soon as Monday, Jan 6
In Stock
Sold by JBTools and ships from Amazon Fulfillment.
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Customer reviews

3.8 out of 5 stars
209 global ratings

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Customers say

Customers find the product easy to use and apply neatly without waste. However, some customers have reported issues with the melt rate, melting temperature being much higher than stated on the packaging, and the syringe coming almost empty. There are mixed opinions on its functionality and strength.

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Ease of useFunctionalityStrengthMelt rateEmpty syringe
11 customers mention "Ease of use"8 positive3 negative

Customers find the product easy to use. They say it's easier to apply than solid rosin core, and they can apply the paste onto their fingers and rub it on the connection. It applies neatly without waste, and a solder iron, lighter, or match can melt it neatly.

"Works great, very easy to use! You get a lot for a great price too. Highly recommend this product and seller." Read more

"Works Great just as described. Easy to use than i expected. I would recommend this product." Read more

"...I didn't exactly know what I was doing and their was VERY little instructions...." Read more

"...I found it easier to apply the paste onto my finger and rub it on the connection. It smells like solid waste, but it's anything but that...." Read more

37 customers mention "Functionality"22 positive15 negative

Customers have different experiences with the product's functionality. Some say it works well, is messy to use, and can be used on bronze. Others mention it doesn't work as expected, needs too much heat, and is not suitable for their intended project.

"...Awesome customer service. As for the product itself, the solder works great for my purposes which was repairing a guitar fret...." Read more

"...an open flame(I use a butane turbo torch) so it's not really usable around any combustibles." Read more

"Worked OK on bronze." Read more

"Works great, very easy to use! You get a lot for a great price too. Highly recommend this product and seller." Read more

8 customers mention "Strength"3 positive5 negative

Customers have different views on the solder's strength. Some say it holds up well over time and has a strong bond, while others mention it never becomes solid after multiple attempts and pulls apart again.

"...Never becomes solid after multiple tries...." Read more

"I love this solder. It is good for wear and tear and holds up nicely. It also does not leave a black coating when being heated...." Read more

"...Never becomes solid after multiple tries. I want a refund but the robo "customer service" of the company is useless...." Read more

"...It just pulls apart again. I will never buy this brand again." Read more

13 customers mention "Melt rate"3 positive10 negative

Customers are unhappy with the product's melt rate. They say it doesn't melt, remains a paste when heat is applied, and the melting temperature is much higher than indicated on the packaging. The paste just keeps running off and never solidified.

"...It does seem to require a higher temp to get going and the range at which it will flow smoothly can be a little finicky if you're using cheap..." Read more

"...The paste just kept running off. He's soldered many things over the years, but this paste frustrated him...." Read more

"...Amount given is smaller than advertised. Remains in paste form when heat is applied, and if more heat is applied it just boils...." Read more

"...It did seem to bond well at pretty low heat however, and her rear window defroster now works like a champ!" Read more

3 customers mention "Empty syringe"0 positive3 negative

Customers are unhappy with the product's empty syringe and tube. They mention it came almost empty, with no material inside the applicator.

"There was nothing inside the applicator was empty, plunger was pushed nearly to the end of applicator and a grey milky substance oozed out...." Read more

"It doesn’t melt remains a paste also the tube I received was almost empty, this company is a rip off" Read more

"Value for money the syringe was not filled when I got it out of the container" Read more

Seller switched product and lied.
1 out of 5 stars
Seller switched product and lied.
This is what arrived - please note the xerox copy of instructions that came with the "item".they responded: "Hello ####, you received the same item that you ordered. The company has just updated the packaging but the contents are the same.Kind regards, Marin"Solder-It is not the same company as ISO-Tip. if you don't believe me check out the company websites for each.
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Top reviews from the United States

  • JC
    5.0 out of 5 stars actually works for repairing guitar frets
    Reviewed in the United States on October 14, 2020
    Verified Purchase
    The first time I ordered this product, usps showed as delivered but I never received it. I got in touch with the seller and they sent me another one for free. Awesome customer service. As for the product itself, the solder works great for my purposes which was repairing a guitar fret. Go slow with the plunger as the product has a tendency to not come out while building pressure, then spurt out all at once. It does seem to require a higher temp to get going and the range at which it will flow smoothly can be a little finicky if you're using cheap soldering equipment like I was. Just be patient and slowly move your temp settings up until you get smooth flowing solder. I initially had my temp settings too high and it was causing me problems until I backed it down.
    9 people found this helpful
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  • Paul E
    4.0 out of 5 stars Small amounts
    Reviewed in the United States on December 12, 2024
    Verified Purchase
    Worked OK on bronze.
    Helpful
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  • Mama3978605
    5.0 out of 5 stars Great value!!
    Reviewed in the United States on February 13, 2024
    Verified Purchase
    Works great, very easy to use! You get a lot for a great price too. Highly recommend this product and seller.
    Helpful
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  • Mary
    1.0 out of 5 stars Doesn’t work
    Reviewed in the United States on September 24, 2024
    Verified Purchase
    Used this for my rear window defroster tab. Awkward and didnt solder at all. Disappointed.
    Helpful
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  • Gregg Riley
    5.0 out of 5 stars Works great
    Reviewed in the United States on June 20, 2023
    Verified Purchase
    Years ago I worked for a company that used a commercial version of this stuff for Christmas lights. I was very pleasantly surprised that this worked as well if not better than the commercial stuff. I used it to replace the injection plugs on a 2008 Ford Edge & my rear pod lights on my RZR. The only drawback if you want to call it that is that it requires an open flame(I use a butane turbo torch) so it's not really usable around any combustibles.
    One person found this helpful
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  • Sunset18431
    2.0 out of 5 stars Solder paste
    Reviewed in the United States on February 23, 2023
    Verified Purchase
    Didn't work very well. When first using, clear liquid came out. It didn't seem mixed at all. You don't get much paste in the tube. I was disappointed with this product because it didn't work when using a torch for soldering. I think I'll stick to my regular spool of solder wire and solder gun method.
    2 people found this helpful
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  • CR
    3.0 out of 5 stars Not so easy to use
    Reviewed in the United States on May 14, 2024
    Verified Purchase
    I wanted to use this to solder a front sight on a pistol. I tested it by trying to solder the ends of two pieces of brass together. Despite cleaning the surfaces, I could separate the brass with my hands. It seems like there isn't much solder in the flux. I think this would be best used like a primer. Heat the part and the flux, and add solder as needed.
    Helpful
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  • Amazon Customer
    5.0 out of 5 stars Great
    Reviewed in the United States on July 25, 2024
    Verified Purchase
    Great
    Helpful
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Top reviews from other countries

  • Arianne
    3.0 out of 5 stars Grainy
    Reviewed in Canada on November 11, 2022
    Verified Purchase
    It seemed to have possibly expired? It wasn’t working well as directed. I know it takes some skill to learn how to weld, but it just seemed to be way to grainy.
    Report
  • Kieth Norrena
    4.0 out of 5 stars Low-temp solder
    Reviewed in Canada on February 2, 2022
    Verified Purchase
    This stuff works great. But I have to say you get way less then you think. That syringe was 2/3rd’s air and 1/3rd solder. For the price I feel robbed.
    Report