

Tenacity Flux 25g
Unit of measure: Each
This Tenacity Flux powder is suitable for soldering at medium temperatures (600 – 900ºc), making it ideal for use with medium and hard solder.
How to use:
The powder should be mixed to a smooth paste with water (a few drops of detergent may be added too) and applied to the clean and de-greased solder joint with a brush before assembly (our non-contaminating flux brush is ideal for this). Extra flux paste should then be applied to either side of the join to ensure a good flow and a solid join is achieved. Apply heat to the whole piece to ensure that the correct temperature is achieved and maintained until the solder melts and flows. The residues left behind with this flux are sometimes hard to remove with water so the join may need to be filed or mechanically cleaned after soldering.
- 25g
- Solder temperatures: 600 – 900ºc
- Dispatch days: Monday to Friday (ex Bank Holidays).
- Typical turnaround: Most orders are shipped the same day if placed before our cutoff.
- During busy periods: Dispatch may take longer during sales events or for complex/custom orders.
- Special Delivery cutoff: Orders for Special Delivery must be placed by 12 noon for same day dispatch.
UK Delivery Options
- Free UK Delivery - Orders over £50.
- Standard Delivery - 3–5 working days with Royal Mail Tracked 48.
- Express Delivery - 1–2 working days with Royal Mail Tracked 24 - only £4.99.
- Special Delivery - Next working day with Royal Mail - from £7.99.
- Courier Delivery - Next working day with FedEx - from £14.99.
International Delivery
- Method: Sent via Royal Mail Tracked, handed over to your local postal service for final delivery.
- Estimated time: Usually 5–10 working days.
- Cost: Starts from £12.99 (varies by destination and order weight).
- Important note: Local import duties, taxes, or customs fees may apply and are payable by the recipient on arrival (not included in our shipping charge).
EU Delivery
- We do not currently ship to EU countries.
US Delivery
- Delivery to the US is temporarily suspended due to recent import tax changes.
Additional Notes
- All times are working days (excluding weekends and public holidays).
- Track your order using the details sent in your confirmation email.
Questions? Contact us
- You can return unused items in their original packaging within 30 days of delivery.
- Earrings and earring parts cannot be returned for hygiene reasons.
- Return shipping is at your cost unless the item is faulty or damaged in transit.













