Brazing Flux, Soldering Flux & Solder Wire

Flux paste, solder wire, and welding compounds for copper pipe jointing in plumbing, HVAC, and refrigeration installations. Lawton and RectorSeal flux in stock alongside Lawton lead-free and leaded solder wire. Same-day dispatch from UK stock.

Soldering Flux Paste

Lawton Soldering Flux Paste — non-acid, non-corrosive, WRAS approved for potable water installations. Compliant with EN-ISO 9454 (2.1.2.C). Available in 113g (SOL-FLF113) with brush in cap for domestic and light commercial work, and 453g (SOL-FLF453) trade pot for high-volume installations. Apply to both the pipe end and the fitting socket before heating.

RectorSeal NOKORODE Regular Paste Flux — a widely specified flux for copper and brass soft soldering in plumbing and HVAC. Available in 48g (14000) and 118g (14030). Water-soluble residue for easy clean-up.

Solder Wire

Lawton ECO 1 Lead-Free Solder Wire (SOL-LF3.0) — Alloy 402 (S-Sn97Cu3), 97% tin 3% copper, EN-ISO 9453:2014. 3.20mm diameter, 500g reel. For potable water, heating, and gas installations.

Lawton Leaded Solder Wire (SOL-L3.0) — Alloy 136 (Pb74Sn25Sb1), 25% tin 74% lead 1% antimony, EN-ISO 9453:2014. 3mm diameter, 500g reel. For non-potable water, heating, and industrial applications only — not for drinking water systems.

Heat Barrier Compounds

Coolweld 32 Spray-on Heat Barrier Gel for protecting adjacent surfaces, cables, and fittings from torch heat during brazing and soldering. Apply before heating and wipe away after the joint has cooled.

Browse Brazing & Soldering Rods for silver solder and brazing rod alloys. Browse Brazing Heat Protection for deflectors, mats, and heat-dissipating sprays. Trade accounts available — call 0161 775 1190 for volume pricing on flux and solder.