---
product_id: 3861037
title: "37509 Klean 'N Prime Anaerobic Activator Aerosol Can - 4.5 oz."
brand: "loctite"
price: "6068 som"
currency: KGS
in_stock: true
reviews_count: 10
category: "Loctite"
url: https://www.desertcart.kg/products/3861037-37509-klean-n-prime-anaerobic-activator-aerosol-can-4-5
store_origin: KG
region: Kyrgyzstan
---

# Fits fasteners 0.08”–0.5” (2.2–12 mm) Accelerates cure below 41°F Works on metals & inactive surfaces 37509 Klean 'N Prime Anaerobic Activator Aerosol Can - 4.5 oz.

**Brand:** loctite
**Price:** 6068 som
**Availability:** ✅ In Stock

## Summary

> 🛡️ Prime like a pro — bond stronger, cure faster, perform better!

## Quick Answers

- **What is this?** 37509 Klean 'N Prime Anaerobic Activator Aerosol Can - 4.5 oz. by loctite
- **How much does it cost?** 6068 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/3861037-37509-klean-n-prime-anaerobic-activator-aerosol-can-4-5)

## Best For

- loctite enthusiasts

## Why This Product

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

## Key Features

- • **Universal Metal Primer:** Ensures strong adhesion on stainless steel, gold, silver, aluminum & plated parts
- • **Leak-Proof Seal Booster:** Enhances threadlockers and sealers to prevent leaks and extend machinery life
- • **Cold-Weather Performance:** Speeds up curing even in freezing temps below 41°F (<5°C)
- • **Precision Fit for Fasteners:** Optimized for fasteners and parts from 0.08” to 0.5” for versatile applications
- • **Industrial-Grade Reliability:** Trusted for valve covers, oil pans, intake manifolds, and more critical automotive components

## Overview

Loctite 37509 Klean 'N Prime Anaerobic Activator is a high-viscosity, silicone-based aerosol primer designed to boost adhesion on inactive metal surfaces including stainless steel, gold, and aluminum. It accelerates cure times for anaerobic adhesives and sealers even in cold environments below 41°F, making it ideal for automotive and industrial maintenance on fasteners and components ranging from 0.08” to 0.5”. This premium activator ensures leak-proof, durable bonds across a wide range of applications, enhancing both performance and longevity.

## Description

LOCTITE Automotive Klean N' Prime Activator 7649 is a high-performance primer adhesive designed to enhance the bonding power of anaerobic adhesives, sealers, and threadlockers. This 4.5 oz aerosol can is specifically formulated for use with inactive surfaces such as plated parts, stainless steel, gold, silver, and aluminum. Ideal for low-temperature environments, this activator works reliably across a wide range of metals and passive substrates, ensuring secure adhesion even on challenging surfaces. It accelerates cure times, making it a perfect choice for applications in cold temperatures (below 41°F / <5°C). The versatile activator is compatible with various automotive parts, including valve covers, oil pans, intake manifolds, alternators, air conditioning belts, distributor clamps, carburetor screws, and even hairline cracks. Whether you're tackling industrial furnaces, fasteners, or other mechanical components ranging from 0.08” to 0.5” (2.2 mm to 12 mm), LOCTITE Klean N' Prime Activator delivers premium quality and reliable performance, improving both the functionality and longevity of your vehicle or machinery.

Review: Use at assembly to prevent leaks and seal. OK for break lines. - Nice sealer to prevent leaks, easy to use, works well, but you must use the activator/cleaner for it to set up.
Review: Good Product for Cleaning before Assembly - 1st off, this product IS NOT intended to clean greasy parts from the get go. It's merely use as a final clean before assembling your parts. Note: This product contains ACETONE and BUTANE and is highly flammable. Even though Acetone and Butane is not consider extremely toxic on certain web sites, I would consider as such. Meaning, you should be in a WELL ventilated area. I did my work outside and it still can take your breath away. I would highly recommend wearing gloves (e.g. nitrate) while working with it. It will dry the moisture out of your skin. Finally, wear a face shield for eye protection too. I hung my parts [bearing race] on a wire as I sprayed them down and let them dry. It remove any residual oil film on the race. I am using Loctite 660 to glue this bearing in place, due to spinning on its own. All of this is needed to insured that the glue bonds to both metal surfaces for the bearing race. I am well pleased how my project turn out and save me an expensive repair.

## Features

- Need Primer? This primer adhesive is used when both surfaces are inactive, including plated parts, stainless steel, gold, silver, and aluminum (PN: 37509-494147)
- Reliable, Low-Temp Adhesion: Designed and works on all metals, most surfaces, including passive substrates and inactive materials
- Versatile Application: Suitable for valve covers, oil pans, intake manifolds, industrial furnaces, fasteners 0.08” to 0.5” (2.2 mm to 12 mm), and more, including alternators, air conditioning belts, distributor clamps, carburetor screws, and hairline cracks
- Premium Quality: Enhances your vehicle’s style, comfort, and functionality with top-tier products you can trust
- Cut Cure Time: Accelerates cure times for anaerobic threadlockers, sealers, gasketing, and adhesives, even in temperatures below 41°F (< 5°C)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002KKTSG |
| Best Sellers Rank | #33,658 in Automotive ( See Top 100 in Automotive ) #94 in Care Corrosion & Rust Inhibitors #1,375 in Oils & Fluids |
| Brand | Loctite |
| Color | Gold |
| Date First Available | July 7, 2004 |
| Global Trade Identification Number | 00079340375093 |
| Item Form | Spray |
| Item Package Quantity | 1 |
| Item Volume | 4.5 Fluid Ounces |
| Item Weight | 6.7 ounces |
| Item model number | 37509 |
| Manufacturer | Loctite |
| Material | Silicone |
| Number of Pieces | 1 |
| Package Information | Can |
| Product Dimensions | 5.6 x 2.17 x 2.17 inches |
| Specific Uses For Product | Fleet and plant maintenance. |
| UPC | 079340375093 |
| Unit Count | 4.5 Ounce |
| Viscosity | High Viscosity |
| Viscosity Level | High |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Loctite
- **Color:** Gold
- **Item Form:** Spray
- **Material:** Silicone
- **Specific Uses For Product:** Fleet and plant maintenance.

## Images

![37509 Klean 'N Prime Anaerobic Activator Aerosol Can - 4.5 oz. - Image 1](https://m.media-amazon.com/images/I/61klVVl5+eL.jpg)

## Questions & Answers

**Q: Would it be good to use this to prime Barrel Threads with certain coatings before using threadlock for mounting different Muzzle devices?**
A: Nope it contains acetone. It will take the bluing off.

**Q: What is the difference between this and 19269 / 7649? I'd like to use a primer for 271. TY.**
A: 7649 type of primer and this is primer N and 19269 size and type of container , this one is  1.75 fluid ounce glass bottle.

**Q: Is this primer necessary when only on surface is inactive, as in moly steel and aluminum?**
A: Since Loctite anaerobic products cure through both the absence of oxygen and the presence of active metal ions, it is often suggested to use a primer on the surface of inactive metals, such as the ones mentioned, in order to achieve a cure time that is similar to that on an active metal, such as steel. The primer may not always be required though, so it is always best to test it for your application.

**Q: Should I use this on loctite 545 with brass and stainless threads?**
A: If applied to stainless, it will speed the cure from that side. Since brass is very "active", not required on that side. Because the brass is so active, may not even need the primer on the stainless.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Use at assembly to prevent leaks and seal. OK for break lines.
*by M***T on August 5, 2025*

Nice sealer to prevent leaks, easy to use, works well, but you must use the activator/cleaner for it to set up.

### ⭐⭐⭐⭐⭐ Good Product for Cleaning before Assembly
*by B***Y on August 3, 2024*

1st off, this product IS NOT intended to clean greasy parts from the get go. It's merely use as a final clean before assembling your parts. Note: This product contains ACETONE and BUTANE and is highly flammable. Even though Acetone and Butane is not consider extremely toxic on certain web sites, I would consider as such. Meaning, you should be in a WELL ventilated area. I did my work outside and it still can take your breath away. I would highly recommend wearing gloves (e.g. nitrate) while working with it. It will dry the moisture out of your skin. Finally, wear a face shield for eye protection too. I hung my parts [bearing race] on a wire as I sprayed them down and let them dry. It remove any residual oil film on the race. I am using Loctite 660 to glue this bearing in place, due to spinning on its own. All of this is needed to insured that the glue bonds to both metal surfaces for the bearing race. I am well pleased how my project turn out and save me an expensive repair.

### ⭐⭐⭐⭐⭐ Great for priming stanless steel
*by J***L on September 18, 2024*

I have four non-tapered stainless steel pipe connections on a heating system storage tank. All attempts to seal the fittings with tape or pipe sealants failed until I primed the fittings with this product, and used Loctite thread sealant. One warning, after applying loctite thread sealer, the sealant begins setting within minutes, so if you prep the threads with this product, keep in mind that it quickly cures thread sealant. For Stainless steel pipe fittings, I highly recommend this product.

## Frequently Bought Together

- Loctite 37509 Klean 'N Prime Anaerobic Activator Aerosol Can - 4.5 oz.
- Loctite 37482 545 Pneumatic/Hydraulic Thread Sealant Bottle - 36 ml
- Loctite 1329467 243 Blue Medium Strength Threadlockers, 1.69 Ounces, 50 mL, 3/4" Thread

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-02-07*