Brownells Formula 44/40 Creme Cold Gun Blue 4Oz

Touch up worn bluing, rust spots, or small scratches on your firearms with Brownells Formula 44/40 Creme Cold Gun Blue, a cold bluing solution that skips the mess and complexity of traditional hot-bluing methods. This creme-based formula gives you the control you need for spot repairs on hunting rifles, shotguns, handguns, and other steel gun parts—no special equipment, no heated tanks, just wipe-on application that works on a range of steel types. If you've got bare metal showing on your receiver, barrel, or trigger guard, this is the fastest way to restore that solid-black finish and protect against rust.

The creme formulation is the key difference here: it stays put where you apply it, eliminating the drips and runs you'd get with a liquid bluing compound. That control matters when you're working on fine details or trying to match existing bluing without overdoing it. The application is straightforward—no mixing, no heating, no waiting for tanks to reach temperature. Surface prep is quick and simple, and the wipe-off method means cleanup takes seconds. One 4-ounce container goes a long way on typical touch-up jobs.

Brownells Formula 44/40 isn't limited to firearms, either. Hunters and shooters often keep a tube in the shop for any bare steel that needs a blue-black finish, whether that's a blade, tool, or other gear. It's a solid choice for field repairs on hunting trips or quick touch-ups in the garage between seasons.

Key Features

• Creme formula provides superior control for precise, targeted application
• Works on a wide variety of steel types
• Simple wipe-on, wipe-off application—no special equipment required
• Produces solid-black finish to match existing gun bluing
• Fast-acting formula minimizes wait time
• Ideal for touch-ups on firearms and general steel work

Specifications

Frequently Asked Questions

What's the difference between Brownells creme cold blue and liquid cold blue?

The creme formula stays where you apply it, giving you much better control for spot touch-ups. Liquid formulas tend to run and drip, making it harder to target small areas without affecting surrounding finish. The creme is designed for precision work on worn or bare spots.

Can I use this on any steel?

Brownells Formula 44/40 Creme works on a wide variety of steel types, which covers most gun barrels, receivers, and other firearm parts. For unusual alloys or plated surfaces, always test on a hidden area first.

How much surface can one 4-ounce tube cover?

A 4-ounce container is designed for touch-up work and typical spot repairs. Since you're applying a thin creme, one tube will handle multiple touch-ups on standard firearms—exact coverage depends on the size of the areas you're treating.

Is surface preparation required before bluing?

Yes, the supplier notes that surface preparation is simple and quick, but some prep is necessary for good adhesion and color match. This typically means cleaning away rust, dirt, and old finish from the area you're treating.