Best Kester in 2026

Last Updated: Sep 27, 2023

At a Glance: Our Top Picks

Solder 60/40 .062 DIA. 1LB SPOOL (1)
#TOP1
Solder 60/40 .062 Dia. 1Lb Spool (1)
9.9
PM SCORE
Kester 24-6040-0053 Solder Roll, 66 Core Size, 0.050" Diameter
#TOP2
Kester 24-6040-0053 Solder Roll, 66 Core Size, 0.050"
9.9
PM SCORE
Kester 44 Solder Wire, 63/37 0.031-in, RMA Rosin, 1-ounce Tube
#TOP3
Kester 44 Solder Wire, 63/37 0.031-In, Rma Rosin,
9.9
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the best Kester of 2026

Solder 60/40 .062 Dia. 1Lb Spool (1)

KESTER
24-6040-0061
2.50 X 2.50 X 2.25 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Kimco Distribution 9.93

Features

(1) Kester 24-6040-0061 Spool, 1 Pound per Spool

Diameter - 0.062"Inch (1.50mm)

60% Tin / 40% Lead (Product contains Halogen)

66 Rosin Core / 44 Flux (3.3%)

Authentic Kester Product

#TOP2
Best Solder

Kester 24-6040-0053 Solder Roll, 66 Core Size, 0.050" Diameter

KESTER
24-6040-0053
2.20 X 3.80 X 2.80 Inches
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Kimco Distribution 9.93

Features

tin 60% and lead 40%

Model Number: 24-6040-0053

Item Package Dimension: 2.599999997348" L x 2.599999997348" W x 2.399999997552" H

Item Package Weight: 1.053 lb

Kester 44 Solder Wire, 63/37 0.031-In, Rma Rosin, 1-Ounce Tube

KESTER
T44-031-DP
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CML Supply 9.88

Features

Specially repackaged by TekLine Supply

1-Ounce pocket size pack contains approx 27 feet of solder!

67/37 Tin/Lead is most common for electronics work

.031" Diameter is common for fine-pitch electronics work

High activity RA formulation

Kester 83-4000-0000 Sn60Pb40 Solder Pocket Pack, 0.031" Wire Diameter

KESTER
83-4000-0000
4.20 X 0.40 X 0.30 Inches
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Wire Diameter: .031"

Alloy: 60% Tin / 40% Lead

Core Size: 66 (3.3% by weight)

Contains: 0.35 oz

Kester 24-6337-0010 44 Rosin Core Solder 63/37 .020 1 Lb. Spool

KESTER
24-6337-0010
2.50 X 2.50 X 2.25 inches
0.99 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Kimco Distribution 9.93

Features

Industry standard for decades

Excellent solderability to a wide variety of metallization's

High activity rosin core formulation

Leaves bright/shiny solder joints after reflow

Standard core 66 (3.3 percent flux)

Kester 24-6040-0039 Rosin Cored Wire Solder Roll, 44 Activated, 0.040" Diameter

KESTER
24-6040-0039
2.50 X 2.50 X 2.25 Inches
1.05 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Kimco Distribution 9.93

Features

The Package Length of the Product is 14.478 centimeters

The Package Width of the Product is 10.921 centimeters

The Package Height of the Product is 3.048 centimeters

Country of Origin: CHINA

Kester 83-3000-0000 Sn60Pb40 Kwik-Draw Solder Pocket Pack, 0.050" Wire Diameter

KESTER
83-3000-0000
5.00 X 1.00 X 0.50 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Wire Diameter: .050"

Alloy: 60% Tin / 40% Lead

Core Size: 66 (3.3% by weight)

Contains: 1.3 oz

Kester 83-7068-1402 Sn96.5 / Ag03 / Cu.5 Lead Free Solder Pocket Pak, 0.031" Diameter, 0.43 Oz.

KESTER
83-7068-1402
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Wire Diameter: .031"

Alloy: 96.5% Tin / 3% Silver / .5% Copper

Core Size: 66 (3.3% by weight)

Contains: 0.43 oz

Kester 1544 Liquid Soldering Flux, Activated Rosin, 2Oz Bottle

KESTER
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CML Supply 9.88

Features

Kester 1544 Liquid Flux Repackaged by CML Supply in this convenient dispensing bottle

Lead Free - RoHS compliant.

Compatible with Lead and Lead-Free Solders

2-ounce bottle

Activated Rosin Formula

Kester 186 Liquid Soldering Flux, Rma Rosin, 2-Ounce Bottle

KESTER
730-T186-2
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CML Supply 9.88

Features

High thermal stability for soldering multi-layer assemblies which require higher temperatures

High preheat temperatures does not degrade solubility of the residue in normal cleaning solvents

Improves soldering performance

2-Ounce Bottle

Eliminates the need and expense of cleaning

Tools & Harware 8310000186 Kester 186 Soldering Flux Pen

KESTER
83-1000-0186
0.04 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

High thermal stability for soldering multi-layer assemblies which require higher temperatures

Exposure to high preheat temperatures does not degrade solubility of the residue in normal cleaning

Improves soldering performance; eliminates the need and expense of cleaning

Classified as Rol0 per j-std-004

Kester83-1000-0951 951 Soldering Flux Pen Low-Solids, No-Clean 10Ml

KESTER
83-1000-0951
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CONCORDE ELECTRONICS 8.32

Features

For rework and touch-up of smt, smd, and through hole solder joints

Suitable for automotive, computer, telecom

10Ml pen applicator with specially designed felt tip

Low solids content for practically no residue

Compatible with lead and lead-free solders

60 Ml. Combo Kester 951 + Kester 186 Soldering Lead Free Flux No Clean

KESTER
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Slavin llc 9.92

Features

60 ml. COMBO KESTER 951 + KESTER 186 Soldering Lead Free Flux NO CLEAN

Kester 2331Zx Water Soluble Flux Pen, White

KESTER
83-1097-2331
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CONCORDE ELECTRONICS 8.37

Features

Kester 2331ZX pen

10ML

Made in the USA

Package dimensions: 1.0 inches (H) x 4.0 inches (L) x 3.0 inches (W)

Kester 44 Lead Solder Wire - +682 F Melting Point - 0.025 In Wire Diameter - Sn/Pb Compound - 37 % Lead - 24-6337-0018 [Price Is Per Pound]

KESTER
24-6337-0018
0.04 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Janel Inc. 5.85

Features

(1) Pound Spool of Kester 24-6337-0018

Diameter - 0.025" Inch (0.60mm)

63% Tin / 37% Lead (Contains Halogen)

66 Rosin Core / 44 Flux (3.3%)

“Instant-action” wetting behavior, high mobility, and fast-spreading

Kester 951 Soldering Flux Pen-Pak By Tekline 12Ml No-Clean Lead-Free

KESTER
730-T951-P
4.00 X 0.50 X 0.50 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING

Features

Kester 951 Liquid Flux Repackaged by CML Supply in this convenient dispensing pen

Lead Free - RoHS compliant.

Compatible with Lead and Lead-Free Solders

12-ml Dispensing Pen

No-Clean Formula leaves virtually NO RESIDUE

60 Ml. Combo Kester 951 + Kester 186 Soldering Liquid Flux Reflow No Clean Flux

KESTER
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SLAVIN LLC 8.68

Features

60 ml. COMBO KESTER 951 + KESTER 186 Soldering Liquid Flux Reflow NO CLEAN FLUX

Kester 83-1097-2331 Organic Water Soluble Liquid Flux Pen For Lead-Bearing And Lead Free Alloy, 0.33 Fl. Oz.

KESTER
83-1097-2331
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

High thermal stability

Improves soldering performance

Eliminates the need and expense of cleaning

Classified as ROL0 per J-STD-004

Kester 83-6337-0027-Vp Activated Rosin Solder, 0.031" Diameter, 0.5 Oz (Pack Of 2)

KESTER
83-6337-0027-VP
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

1/2 oz. Pocket pack (tube)

Rosin core

63 percent tin, 37 percent lead

Kester 83-1000-0951 Low Solid No Clean Flux Pen, 0.33 Fl. Oz.

KESTER
83-1000-0951
0.39 X 0.59 X 0.59 Inches
2.00 ounces
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CONCORDE ELECTRONICS 8.32

Features

Improves soldering performance

Eliminates the need and expense of cleaning

Non-corrosive tack-free residues

Classified as ORL0 per J-STD-004

Compliant to Bell core GR-78

Kester 186 Liquid Soldering Flux, Rma Rosin, 12Ml Pen

KESTER
730-T186-P
4.00 X 0.50 X 0.50 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CML Supply 9.88

Features

Kester 186 Liquid Flux Repackaged by CML Supply in this convenient dispensing pen

Lead Free - RoHS compliant.

Compatible with Lead and Lead-Free Solders

12-ml Dispensing Pen

Mildly Activated Rosin (RMA) Formula

60 Ml. Combo Kester 961E + Kester 186 Soldering Liquid Flux Lead Free No Clean Flux

KESTER
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Slavin llc 9.92

Features

60 ml. COMBO KESTER 961E + KESTER 186 Soldering Liquid Flux LEAD FREE NO CLEAN FLUX

Kester 63-0097-2331-2331-Zx Soldering Flux, Organic, Water-Soluble, 1 Gallon

KESTER
K-6300972331
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
VoyageSupply 9.75

Kester 979 Soldering Flux Bottle By Tekline 2Oz Water Based No-Clean

KESTER
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CML Supply 9.88

Features

Kester 979T Liquid Flux Repackaged by CML Supply in this convenient dispenser

Lead Free - RoHS compliant.

Compatible with Lead and Lead-Free Solders

2-Ounce Bottle

No Clean Formula- Low Solids Content for LOW RESIDUE

60 Ml. Kester 186 Soldering Flux

KESTER
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SLAVIN LLC 8.68

Features

60 ml. KESTER 186 Soldering FLUX

Kester 959T Soldering Flux Pen-Pak By Tekline 12Ml No-Clean Low-Solids

KESTER
730-T959-P
4.00 X 0.50 X 0.50 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CML Supply 9.88

Features

Kester 959T Liquid Flux Repackaged by CML Supply in this convenient dispensing pen

Lead Free - RoHS compliant.

Compatible with Lead and Lead-Free Solders

12-ml Dispensing Pen

No-Clean Formula leaves virtually NO RESIDUE

60 Ml. Combo Kester 961E + Kester 186 Soldering Liquid Flux Reflow No Clean

KESTER
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SLAVIN LLC 8.68

Features

Flux , soldering flux , kester , no clean

Kester 1544 Liquid Soldering Flux, Activated Rosin, 12Ml Pen

KESTER
730-T186-P
4.00 X 0.50 X 0.50 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CML Supply 9.88

Features

Kester 1544 Liquid Flux Repackaged by CML Supply in this convenient dispensing pen

Lead Free - RoHS compliant.

Compatible with Lead and Lead-Free Solders

12-ml Dispensing Pen

Activated Rosin Formula

Kester 44 Activated Rosin Flux Core Lead-Free Solder Wire - 1 Lb - 0.031 In Wire Diameter - Sn/Ag Compound - 24-7070-0027 [Price Is Per Pound]

KESTER
24-7070-0027
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neobits_ 8.87

Features

The Kester 24-7070-0027 lead free, high activity, rosin activated cored wire is excellent for

Solder Flux, No Clean, Soldering, Pen Applicator

KESTER
83-1046-0952
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
VoyageSupply 9.75

Kester on Amazon: A Comprehensive Review

As an online shopper, it's crucial to make informed decisions. This review will focus on Kester, a brand that has made its presence felt on Amazon. With its wide range of products in Solder, Kester has become a go-to for many shoppers.

Product Range

Kester offers a vast product count of 33 items. This diverse selection caters to a wide array of needs and preferences, making it a versatile brand for consumers.

Quality and Pricing

Quality is a defining factor for any brand. Based on customer feedback and ratings, Kester's products have an average rating of 6.3 out of 10, indicating a high level of customer satisfaction.

When it comes to pricing, Kester has products ranging from a minimum price of $5.42 to a maximum of $141.11, with an average price of $30.58. This pricing structure caters to a wide range of budgets, making Kester an accessible choice for many shoppers.

Customer Service

Customer service is the backbone of any successful online brand. Kester is sold by kimco distribution amazon.com cml supply neobits_ slavin llc glemco parts janel inc. voyagesupply khc shop and concorde electronics, who are known for their commitment to customer satisfaction. They have been responsive and helpful, according to customer reviews and feedback.

Shopping Experience

The shopping experience on Amazon with Kester has been largely positive. The brand's wide range of products, combined with the ease of navigation on Amazon, has made shopping a breeze for many customers.

Delivery and Packaging

Delivery and packaging are yet another aspect where Kester shines. Items are delivered in a timely manner and the packaging ensures the products reach the customers in pristine condition.

Conclusion

In conclusion, Kester offers a wide range of quality products at varying price points, making it a brand worth considering for your next Amazon purchase. Their commitment to customer service, combined with a seamless shopping experience, makes Kester stand out in the crowded Amazon marketplace.

Overall Rating

Based on the analysis of product range, quality, pricing, customer service, shopping experience, and delivery, we rate Kester [6.3 out of 10 stars].