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Qualitek 381F Flux

Ideal rosin based active flux for wire tinning

Ideal rosin based active flux for wire tinning

MPN: 381F

A rosin based flux with excellent wetting properties giving excellent soldering results.

  • Ideal as a pre-dip for wire tinning
  • Purchase separately or with our solder pot kits
  • Gives an excellent solder finish

Note: Currently not available for delivery to N.Scotland, N.Ireland, Scottish Isles, Isle of Wight, Isle of Man, Scilly Isles, Europe Zone 3, Europe Zone 4, Europe Zone 5, Europe Zone 6, Guernsey, Jersey and Australia, Brazil, Canada, Hong Kong, Malaysia, Mexico, New Zealand & USA.

£9.55 ex VAT(£11.46 inc VAT)
In Stock
£13.60 ex VAT(£16.32 inc VAT)
In Stock
1 litre

Delivery Options

Product Description

The Qualitek 381F flux is an active low solids flux producing an excellent wetting action. Used for wave soldering of printed circuit boards and for copper wire tinning as a pre dip flux prior to solder pot tinning. It it suitable for lead free and leaded soldering temperatures. Available in 3 different sizes. 

Excellent wettability

Non-conductive non-tacky residues

Available in 500ml and 1 litre containers

Ideal for wire tinning preparation




Customer Reviews

By on
"Great product good to have in 1 litre."
Star Rating 5
By on
"Excellent flux works very well pleased with product."
Star Rating 4
By on
"Unfortunately, not suitable for our application, a flux past worked better."
Star Rating 2
By on
"Its flux. It works!!!!"
Star Rating 5
By on
"good quality flux, meeting standard required at a really good price."
Star Rating 5


Flux classification: ROL0
Specific Gravity (Sg): 0.8000 + / - 0.005
Solids Content: 4.4 - 5.3
Appearance: Straw coloured liquid
Highly Flammable (See SDS)


Somerset Solders

Leading stockist of lead free and leaded solder wires, pastes and bar. Liquid fluxes and flux gels stocked.

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