---
product_id: 140555824
title: "Birchwood Casey Fast-Acting Long-Lasting Spanish Perma Blue Liquid Gun Blue for Steel, Touch-Up & Complete Reblue, 3 FL OZ (90ml)"
brand: "birchwood casey"
price: "€ 17.96"
currency: EUR
in_stock: true
reviews_count: 13
category: "Birchwood Casey"
url: https://www.desertcart.ie/products/140555824-birchwood-casey-fast-acting-long-lasting-spanish-perma-blue-liquid
store_origin: IE
region: Ireland
---

# Fast-acting formula Deep, even blue-black finish No heat required application Birchwood Casey Fast-Acting Long-Lasting Spanish Perma Blue Liquid Gun Blue for Steel, Touch-Up & Complete Reblue, 3 FL OZ (90ml)

**Brand:** birchwood casey
**Price:** € 17.96
**Availability:** ✅ In Stock

## Summary

> 🔵 Bring your steel back to life with the pro’s choice in gun blueing!

## Quick Answers

- **What is this?** Birchwood Casey Fast-Acting Long-Lasting Spanish Perma Blue Liquid Gun Blue for Steel, Touch-Up & Complete Reblue, 3 FL OZ (90ml) by birchwood casey
- **How much does it cost?** € 17.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/140555824-birchwood-casey-fast-acting-long-lasting-spanish-perma-blue-liquid)

## Best For

- birchwood casey enthusiasts

## Why This Product

- Trusted birchwood casey brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Application:** No heat needed—just swab on and watch scratches vanish 🛠️
- • **Instant Restoration Power:** Fast-acting liquid formula revives steel surfaces in minutes ⚡
- • **Flawless Blue-Black Finish:** Delivers a smooth, non-streaky, professional-grade reblue 🔵
- • **Trusted by Pros Since 1948:** Preferred by gunsmiths and collectors for unmatched quality and reliability
- • **Versatile Touch-Up & Complete Reblue:** Perfect for minor scratches or full gun refinishing on steel (excludes stainless)

## Overview

Birchwood Casey Spanish Perma Blue Liquid Gun Blue is a fast-acting, high-quality solution designed to restore and protect steel firearms with a durable, even blue-black finish. Trusted by professionals since 1948, it requires no heat and is ideal for touch-ups or complete rebluing, delivering a streak-free, long-lasting result that revives worn or scratched gun surfaces.

## Description

BIRCHWOOD CASEY SPANISH PERMA BLUE LIQUID GUN BLUE Make your gun like new with our Birchwood Casey Spanish Perma Blue Liquid Gun Blue. Birchwood Casey Perma Blue Liquid - Birchwood Casey offers you the best ways to touch up scratches and worn spots or even completely reblue most guns. It will give a non-streaky, even blue-black finish to steel (except stainless). Both Perma Blue Liquid Gun Blue and Paste Gun Blue provide great bluing to metal that has already been thoroughly cleaned and is free of rust. Perma Blue Paste Gun Blue is slower to darken than Liquid Gun Blue, but will build up a denser finish. The best way to touch up scratches and worn spots on a blued barrel. BIRCHWOOD CASEY Since 1948, serious shooters, avid collectors and professional gunsmiths have relied on Birchwood Casey for shooting and gun care products; Birchwood Casey has pioneered innovative products with an unwavering dedication to quality.

Review: Worked great - Worked great
Review: Used for small ding/scuffs on Glock and a Vietnam bayonet - I used this on my Glock 19 for some surface scuffs that I caused by putting on new sights. I used a Vism rear sight tool and I did not adjust it quite right and it slightly drug the rear chuck across the slide. It caused a few minor scuffs or dings about a half inch long. I was going to use the Birchwood Casey flat black touch up marker like others have said worked, but after I got it I decided heck no. It would have looked terrible. So I thought what the hey, I would try it with the perma blue and try one small spot. IT WORKS. I end up doing the rest of the marks and now you cannot even tell they were there. It was just deep enough that I could see metal and it was driving me crazy. I even tried Hoppes no 9 first, just to make sure it wasn't surface transfer I did some searching on the best way to do this. I heated up the slide with a heat gun to get it warm. Apparently it works better if the metal is warm. If you get it too hot, it will stink when the perma blue hits the hot metal, but still worked, I just kept applying until it got dark enough and then rinsed it with water to stop the reaction. When done, I wiped it down with gun oil and buffed it with the cloth. I also did my dad's Vietnam bayonet and it turned out awesome. I was trying to sharpen it years ago and it just left a lot of scuffing. I heated the knife, added the perma blue until it started to get dark and then rinsed it. I did this 4 times and then I followed up with 0000 steel wool and some gun oil to smooth out the perma blue and BAM, it looks awesome again. Took care of all the little scratches using the 0000 steel wool too. I normally don't get real excited about items, but this one I did. I fix 2 issues with one product. And it did what I would expect it to do.

## Features

- PROVEN WAY FOR TOUCHING UP - Birchwood Casey offers you the best ways to touch up scratches and worn spots or even completely reblue most guns. It will give a non-streaky, even blue-black finish to steel (except stainless)
- FAST-ACTING - Spanish Perma Blue liquid gun blue and paste provide great blueing to metal that has already been thoroughly cleaned and is free of rust. Perma blue paste gun blue is slower to darken than liquid gun blue, but will build up a denser finish
- HIGH-QUALITY - This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials
- BEST SHOOTING GEAR - Since 1948, serious shooters, avid collectors and professional gunsmiths have relied on Birchwood Casey for shooting and gun care products; Birchwood Casey has pioneered innovative products with an unwavering dedication to quality
- NOTE - Birchwood Casey Spanish Perma Blue liquid gun blue will not blue stainless steel, aluminum or non-ferrous metals. Can be applied with swabs (Q-Tips). No heat required. Excellent for touch up or complete reglueing

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002J1N6YA |
| Best Sellers Rank | #36,307 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #98 in Gun Lubrication |
| Brand Name | Birchwood Casey |
| Color | Blue |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,143) |
| Date First Available | May 13, 2019 |
| Included Components | Birchwood Casey Spanish Perma Blue Liquid Gun |
| Item Dimensions LxWxH | 1 x 1 x 1 inches |
| Item Package Dimensions L x W x H | 3.62 x 1.97 x 1.38 inches |
| Item Weight | 3.2 ounces |
| Manufacturer | Birchwood Casey |
| Model Name | Fast-Acting Long-Lasting Spanish Perma Blue Liquid Gun Blue for Steel |
| Number of Items | 1 |
| Package Weight | 0.11 Kilograms |
| Part Number | BC-13187 |
| Size | One Size |
| Style | 90ml Liquid |
| Suggested Users | unisex-adult |
| Warranty Description | See Manufacturer |

## Product Details

- **Brand:** Birchwood Casey
- **Included Components:** Birchwood Casey Spanish Perma Blue Liquid Gun
- **Liquid Volume:** 90 Milliliters
- **Manufacturer:** Birchwood Casey
- **UPC:** 029057131871

## Images

![Birchwood Casey Fast-Acting Long-Lasting Spanish Perma Blue Liquid Gun Blue for Steel, Touch-Up & Complete Reblue, 3 FL OZ (90ml) - Image 1](https://m.media-amazon.com/images/I/51yZMCrzN-S.jpg)

## Questions & Answers

**Q: Does this inhibit rust?**
A: Bluing is an acid process and makes polished metal more susceptible to rust, BUT, the surface tension improves the ability of oil to remain on the surface. So, while the bluing itself does not improve rust resistance, a properly oiled blued surface does. But you can't skip the oil. Wipe it down once a month or after cleaning and use, with enough to just darken the surface and turn it glossy.

**Q: Will this darken nickel plating?**
A: Hi, I haven’t tried, but in my knowledge and research I believe it will not... you could try to contact the company? Nickel is a different chemical mixture than most materials. We use it on steel guns from holster wear.

**Q: Will it turn brass blue?**
A: Birchwood Casey has a Brass Black
https://smile.amazon.com/Birchwood-Casey-Brass-Finish-3-Ounce/dp/B0000C514O/ref=sr_1_33?crid=8PKKSQSHII7L&keywords=birchwood%2Bcasey%2Bsuper%2Bblue&qid=1648750227&sprefix=birchwood%2Bcasey%2Bsuper%2Bblue%2Caps%2C99&sr=8-33&th=1

**Q: Does this work on Sterling Silver?**
A: It doesn't say, it doesn't work on stainless steel is what it says. Basically what this chemical does is slowly rust metal and stains to give it the bluing effect. Sterling silver doesn't rust but the blue stain in this might change the color but not like a steel firearm. Hope this helps.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked great
*by C***G on January 18, 2026*

Worked great

### ⭐⭐⭐⭐⭐ Used for small ding/scuffs on Glock and a Vietnam bayonet
*by K***Y on January 11, 2023*

I used this on my Glock 19 for some surface scuffs that I caused by putting on new sights. I used a Vism rear sight tool and I did not adjust it quite right and it slightly drug the rear chuck across the slide. It caused a few minor scuffs or dings about a half inch long. I was going to use the Birchwood Casey flat black touch up marker like others have said worked, but after I got it I decided heck no. It would have looked terrible. So I thought what the hey, I would try it with the perma blue and try one small spot. IT WORKS. I end up doing the rest of the marks and now you cannot even tell they were there. It was just deep enough that I could see metal and it was driving me crazy. I even tried Hoppes no 9 first, just to make sure it wasn't surface transfer I did some searching on the best way to do this. I heated up the slide with a heat gun to get it warm. Apparently it works better if the metal is warm. If you get it too hot, it will stink when the perma blue hits the hot metal, but still worked, I just kept applying until it got dark enough and then rinsed it with water to stop the reaction. When done, I wiped it down with gun oil and buffed it with the cloth. I also did my dad's Vietnam bayonet and it turned out awesome. I was trying to sharpen it years ago and it just left a lot of scuffing. I heated the knife, added the perma blue until it started to get dark and then rinsed it. I did this 4 times and then I followed up with 0000 steel wool and some gun oil to smooth out the perma blue and BAM, it looks awesome again. Took care of all the little scratches using the 0000 steel wool too. I normally don't get real excited about items, but this one I did. I fix 2 issues with one product. And it did what I would expect it to do.

### ⭐⭐⭐⭐ Need to understand how to use
*by A***H on February 5, 2026*

Got for my weapon to prevent rust from a deep scratch, it wares off after sometime and needs reapplications or I didn’t apply properly.

## Frequently Bought Together

- Birchwood Casey Fast-Acting Long-Lasting Spanish Perma Blue Liquid Gun Blue for Steel, Touch-Up & Complete Reblue, 3 FL OZ (90ml)
- Birchwood Casey Fast-Drying Fast-Acting Aluminum Black Metal Finish for Restoring Scratched and Marred Areas, Gun Cleaning
- Homax 10120000 Steel Wool, 12 pad, Grade #0000, Rhodes American, Final Finish

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-16*