Solder Pastes

Solder paste is a type of solder used when manufacturing PCBs to connect surface mount components to pads on the board. The paste is a mixture of small solder spheres with flux.
The paste initially adheres components in place because of its stickiness. You then use heat to melt the paste to form a mechanical bond and an electrical connection.
Solder paste is applied to the board by stencil printing and the components are put in place by a pick and place machine or by hand.
Why use a solder paste?
Defects in circuit-board assembly are caused due to issues in the solder-paste printing process or due to defects in the solder paste. This can give short circuits, incomplete circuits, and head on pillow defects.
How to use Solder paste
• Remove oil, grease, polishing compound and any excessive oxides from the joint. Make sure that the joint is smooth, flat and free from any burs.
• Apply the solder paste to the top joint. The paste will not fill large gaps so make sure that the pieces to be soldered actually touch.
• Apply heat to the piece away from the joint, keep the heat source moving too prevent overheating the paste.
• Once the paste flows remove the heat source

Typical Applications
Solder pastes are used in mass production of PCBs and prototype PCB assembly.

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RS Stock No. 835-2699
Mfr. Part No.SKU-0018
£6.69
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- Electric Paint Pen 10ml
RS Stock No. 184-9985
Mfr. Part No.291264
BrandMulticore
£19.79
Each
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- - Syringe 25g
RS Stock No. 506-4289
Mfr. Part No.653555
BrandMulticore
£65.33
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- - Tub 500g
RS Stock No. 551-693
Mfr. Part No.291337
BrandMulticore
£19.29
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- - Syringe 25g
RS Stock No. 555-232
Mfr. Part No.GEL FLUX MOB 39 - SERINGUE DE 10CC
BrandMBO
£16.81
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- - Syringe 10cm³
RS Stock No. 506-4302
Mfr. Part No.698840
BrandMulticore
£83.77
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Yes - Tub 500g
RS Stock No. 835-2693
Mfr. Part No.SKU-0216
£18.35
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- Electric Paint Jar 50ml
RS Stock No. 184-9991
Mfr. Part No.291266
BrandMulticore
£34.65
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- - Syringe 75g
RS Stock No. 832-9775
Mfr. Part No.1817240
BrandHenkel
£57.29
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Yes Loctite HF212 SAC0307 AGS Jar 500g
RS Stock No. 832-9766
Mfr. Part No.1817229
BrandHenkel
£77.54
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Yes Loctite HF212 97SC AGS Jar 500g
RS Stock No. 910-6790
Mfr. Part No.2002845
BrandHenkel
£105.60
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Yes - Jar, Semco Cartridge 500g
RS Stock No. 832-9750
Mfr. Part No.1791137
BrandHenkel
£92.38
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Yes Loctite HF212 97SC DAP Jar 500g
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RS Stock No. 189-4513
Mfr. Part No.SKU-0308
£250.00
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RS Stock No. 146-6189
Mfr. Part No.SMD291AX10T5
BrandCHIPQUIK
£24.99
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- - Syringe 35g
RS Stock No. 146-6190
Mfr. Part No.SMD291AX250T3
BrandCHIPQUIK
£33.92
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- - Jar 250g
RS Stock No. 146-6195
Mfr. Part No.SMD291SNL250T3
BrandCHIPQUIK
£44.63
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Yes - Jar 250g
RS Stock No. 146-2877
Mfr. Part No.4902P-25G
£20.46
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Yes - Syringe 25g
RS Stock No. 146-6191
Mfr. Part No.SMD291AX50T3
BrandCHIPQUIK
£11.21
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- - Jar 50g
RS Stock No. 146-6196
Mfr. Part No.SMD291SNL50T3
BrandCHIPQUIK
£14.79
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Yes - Jar 50g
RS Stock No. 146-6192
Mfr. Part No.SMD291SNL
BrandCHIPQUIK
£12.75
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Yes - Syringe 15g
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Tack Flux no clean 5cc (for lead-free applications) w/plunger & tip. Low viscosity no-clean synthetic paste flux. Has a pleasant odor. Ideal for all rework, solder, de-solder and reflow applicationsNon-corrosive, non-conductive, no-cleanTack flux will not run all over PCB when appliedHas a pleasant odorExcellent wettingEasily cleaned with isopropyl alcohol (IPA)Attachment ...
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Tack Flux no-clean water-washable 10cc syringe w/plunger & tip. Low viscosity no-clean water-washable synthetic paste flux. Has a pleasant odor. Ideal for all rework, solder, de-solder and reflowapplicationsNon-corrosive, non-conductive, no-clean, water-washableTack flux will not run all over PCB when appliedHas a pleasant odorExcellent wettingEasily cleaned with isopropyl alcohol (IPA) or ...