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Machines and materials for PCB assembly


Flux, solder paste, solder wire and solder bar


 Solder paste Kester

Application Dispensing Alloy Melting Range Recommended Types
Stencil Printing Dispensing Syringe
    °C No Clean Water-Soluble No Clean
SnPb TinLead Sn63Pb37 183 EP256   HM531 R276
Sn62Pb36Ag2 179 - 189 EP256  HM531 R276
Lead-Free Sn96.5Ag3.0Cu0.5 217 NXG1 , NP505-HR* , NP545
EM828 R276LF

* - Available with a metal powder size Type 4 (20-38 μm) and Type 3 (25-45 μm).

Liquid Flux Kester

 Flux type Recommended Types Flux thinners Tacky Soldering Fluxes
Designed for foam and wave fluxer applications Designed for spray applications.
No Clean Water-Soluble No Clean Water-Soluble   No Clean
Alcohol Based


2235 959T ; 952S 2235 108S



950E 951, 985M, 372-TB, SELECT-10TM 110, 4662
VOC - Free
2220-VF 979T 2220-VF De-ionised water

Cored Solder Wire Kester

Formula Alloy Recommended Types Flux-core sizes

Standard wire diameters

No Clean
Metric Inch
SnPb TinLead Sn63Pb37 245

1,1 %

(Core 50)

2,2 %

(Core 58)

0.25мм 0.010
0.4мм 0.015
0.6мм 0.025
0.8мм 0.031
1.0мм 0.040
1.2мм 0.050
1.5мм 0.062
Lead-Free SAC 305 (Sn96.5Ag3.0Cu0.5) 275

  2,2 %

(Core 58)
K100LD (Sn99.3Cu0.7)     3,3 %

(Core 66)

Solder Bar Kester

Formula Alloy Melting Range
  SnPb TinLead Sn63Pb37 183  
Sn60Pb40 183 - 190  
  Lead-Free SAC 305 (Sn96.5Ag3.0Cu0.5) 217  
K100LD (Sn99.3Cu0.7) 227  
100%Sn 232  

Additional information about using Kester products can be found in Section - Publications. The most frequently asked questions and their answers can be found here.

We keep on stock in Sofia the most frequently required products of Kester.