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RectorSeal 12 oz Lead-Free Soldering Flux Tin/Antimony

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

A lead-free tin/antimony flux that tins copper joints clean, in a 12oz jar sized for repeat jobs.
Rectorseal MPN 74025 In Stock & Ready to Ship
$16.99
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

C-Flux from RectorSeal is a tin/antimony soldering flux built for tinning copper joints before you sweat them together. The 12oz jar gives you enough for repeated jobs around the shop or on-site, and the lead-free formula meets today's plumbing codes without sacrificing a clean, solid bond. Keep in mind this flux is not rated for electrical work or water-soluble cleanup, so it's suited strictly to plumbing and mechanical soldering applications.

  • Container size: 12oz jar
  • Material: Tin/Antimony
  • Lead-free formula
  • Tinning: Yes
  • Not suitable for electrical use
  • Made in USA

The Details Specifications

Brand Rectorseal
Model / MPN 74025
UPC 021449740258
Weight 1 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.

On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Rectorseal. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Rectorseal

Or skip the tabs entirely and buy it down the street. Find a store near you →

Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

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