Would it be good to use this to prime Barrel Threads with certain coatings before using threadlock for mounting different Muzzle devices?

Nope it contains acetone. It will take the bluing off.

What is the difference between this and 19269 / 7649? I'd like to use a primer for 271. TY.

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.

Is this primer necessary when only on surface is inactive, as in moly steel and aluminum?

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.

Should I use this on loctite 545 with brass and stainless threads?

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.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

- 37509 Klean 'N Prime Anaerobic Activator Aerosol Can - 4.5 oz.

Product ID: 3861037

Details

Brand
Loctite
Color
Gold
Item Form
Spray
Material
Silicone
Specific Uses For Product
Fleet and

🔧Works on fasteners 0.08” to 0.5” (2.2-12 mm)

🧪Activates anaerobic adhesives on inactive metals

❄️Reliable adhesion below 41°F (5°C)

€ 53.25

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

Description

🛠️ Prime your projects with power and precision!

COLD WEATHER READY ADHESION - Ensures fast curing even in temperatures below 41°F (<5°C)
PREMIUM QUALITY YOU CAN TRUST - Enhances durability and performance for professional-grade repairs
PRECISION FASTENER COMPATIBILITY - Optimized for fasteners from 0.08” to 0.5” (2.2 mm to 12 mm)
VERSATILE INDUSTRIAL AUTOMOTIVE USE - Ideal for valve covers, oil pans, intake manifolds, and more
BOOSTS BOND STRENGTH ON INACTIVE SURFACES - Perfect for plated parts, stainless steel, gold, silver, and aluminum

Loctite 37509 Klean 'N Prime Anaerobic Activator is a 4.5 oz aerosol primer designed to enhance adhesion of anaerobic adhesives on inactive metals like stainless steel and aluminum. It accelerates cure times even in cold environments below 41°F, supports fasteners from 0.08” to 0.5”, and is ideal for automotive and industrial applications requiring reliable, high-performance bonding.

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 53.25

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

View all Trustpilot reviews

- 37509 Klean 'N Prime Anaerobic Activator Aerosol Can - 4.5 oz.

Details

Details

Description

Specifications

Common Questions