Best Weld Through Primer Review 2023

When it comes to welding, achieving a strong and durable bond between metal surfaces is crucial. However, the welding process often results in exposed bare metal, leaving it vulnerable to corrosion and rust. This is where weld through primers come into play. A weld through primer is specifically designed to protect metal surfaces during welding while ensuring a reliable and long-lasting bond.

In this comprehensive article, we delve into the world of weld through primers and explore the key factors to consider when choosing the best one for your welding projects. We’ll discuss the importance of using a weld through primer, its benefits, and how it works. Additionally, we’ll provide you with a curated list of top-rated weld through primers available on the market, along with their features and advantages.

Whether you’re a professional welder seeking optimal protection for your welds or a DIY enthusiast looking to enhance the durability of your metal projects, this guide will equip you with the knowledge to make an informed decision. By the end, you’ll have a clear understanding of the best weld through primers and be ready to take your welding endeavors to the next level.

Seymour 20-1675 PBE Professional Primer, Self Etching/Weld Through Gray

When it comes to welding, you want the best quality possible. Seymour 20-1675 PBE Professional Primer is one of the best products on the market when it comes to welding metal surfaces. This product has a durable zinc enhanced coating that helps protect all metal surfaces from electrochemical galvanic action. This ensures a high level of accuracy and results in a much more consistent weld finish.

The primer helps to achieve a high degree of weld through gray color. This makes it ideal for welding in difficult or dangerous areas. The primer also ensures the accuracy of welds and protects the metal from wear and tear.

3M Weld-Thru Coating II, 05917, Zinc Based Aerosol Coating, Resists Weld Spatter, 12.75 oz Net Wt/361

The 3M Weld-Thru Coating II, 05917, is a zinc-based aerosol coating that resists weld spatter. The coating is available in a 12.75 oz net weight container and can be applied using an air gun or sprayer. The coating can be used on metal, plastic, and composites materials. The 3M Weld-Thru Coating II, 05917, has a viscosity of 2200 cps and can be applied in a variety of coatings applications including: hot dip galvanizing, rust protection, electroplating, and more.

The most common type of welding is the use of an arc. The heat from the welding torch melts the metal and then a filler rod is used to pour metal onto the joint. The filler rod vaporizes the metal, which causes an intense flame that welds the two pieces together. One of the biggest problems with welding is that it can create a lot of spatter. This spatter is molten metal that escapes from the welder’s torch and falls on nearby objects, including bare metal panels and parts.

Weld-Thru Coating II, 05917, Zinc Based Aerosol Coating, Resists Weld Spatter, 12.75 oz Net Wt 36 from 3M helps to prevent costly comebacks by protecting bare metal panels and parts from corrosion after welding. The coating is made with zinc and works to resist weld spatter.

U-POL Weld#2 – Weld Through Copper Rich Primer 450 Ml

U-POL Weld 2 is a welding primer that is designed to weld through copper rich materials. It comes in a 450 ml bottle and has a viscosity of 230 cps. U-POL Weld 2 was developed with the intention of providing an easy to use, high quality welding primer that will help improve your welds.

One of the most important things you need when welding through copper rich materials is a primer that will help reduce the chances of cracking or splitting the metal. U-POL Weld 2 was specifically designed to meet these needs and it comes with a number of benefits.

First, U-POL Weld 2 helps to create a strong joint by filling in any gaps in the metal. This prevents anything from breaking while the weld is being created and it also makes for a more durable connection.

Spray MAX 3680001 1k Self Etch Weld-Thru Primer (Red Brown)

The Spray MAX 3680001 1k Self Etch Weld-Thru Primer (Red Brown) is a corrosion resistant primer that is perfect for use on steel and other metal surfaces. This primer is non-toxic and anti-corrosive, making it a great choice for any welding project.

This primer is easy to use and can be applied using standard spray equipment. Because it is self etching, this primer will create a permanent seal against corrosion.

Sem 40773 zinc Based Weld Thru Primer

Sem 40773 zinc Based Weld Thru Primer is a new and innovative product that promises to improve the quality of welds. The primer is made from zinc and it is designed to coat the weld zone before the welding process begins. This will help to prevent oxidation, impurities, and other problems that can occur during welding.

The Sem 40773 zinc Based Weld Thru Primer has been designed for use with electric arc welding. It is a two part system that requires mixing before use. The first part is a diluting agent and the second part is the primer. The primer comes in a variety of colors so you can choose the color that best suits your project.

The Sem 40773 zinc Based Weld Thru Primer is easy to use and it comes with instructions on how to mix and use it properly.


Functions Of Weld Through Primer

Weld-through primer is a type of primer that is specifically designed to be used with welds. This saves on paint because it can protect an entire panel before you even have to put it up for sale. By using weld-through primer, you can avoid having to deal with any potential problems that could occur while painting your structure.

How Does Weld-through Primer Work?

When you make a weld, you may find exposed areas where the metal is not touching any other material. This is because welds are made with molten metal and hot gas. The two substances work together to create a strong joint. When the two substances touch each other, it creates heat and pressure that can cause the metal to fuse together.

What does weld thru primer mean?

Weld through primer is a particular primer used on welded surfaces. These primers are usually applied before the welding procedure.

Does weld through primer really work?

Weld Through Primer is not just a gimmick and actually works! No matter the brand of all weld-through primers have in common that a zinc based so are used. The zinc covers the existing metal and seals out moisture and rust.

Is zinc primer the same as weld through primer?

Weld-through primers are usually a zinc-based product that are typically applied to the mating surfaces prior to welding.

Is all zinc primer weld through?

A zinc-rich welding primer coating fully welds and dries quickly, offering protection against rusting corrosion. Made of an Indasa professional-grade bodyshop-grade aerosol product.

Is weld-thru primer waterproof?

Weld Through Primer features high protection from salt as well as water, providing durable corrosion protection to the weld territory. It is quick drying and water-resistant after 15 minutes.

Is weld through primer self etching?

Unique self-etching primer with its own natural binders will substitute for heavy metals like zinc and copper. These unique binders will burn off at welding, leaving a corrosion resistant self-etching primer for later paint preparation.

Can you weld on top of paint?

YES, you can weld steel that has been painted. No trouble there. You may use 6011, 6013, 7014, or even 7018 and weld away.

Which Is The Best 3M Weld Thru Primer?

3M Weld-Thru II is a zinc-based aerosol spray that helps prevent corrosion between welded metal surfaces. directions in an aerosol can for easy application, the product protects welded metal surfaces from the elements by forming a thin zinc layer on the surface.

What Kind Of Primer Do I Use For MIG Welding?

There are a variety of different MIG weld-through primers from which to choose, but you must know what the joint will be utilized for when selecting the primer to use. If you choose to use a copper-based weld-through primer, you can leave it over the joint after welding, but a zinc-based material will create a rusty-looking joint if you leave it too long.

When To Use Weld Through Primer On Welding Flanges?

Weld-through primer is a type of welding primer used when both the GMA (MIG) welding and spot welding flange surfaces are to be welded. It is a clear, colorless material that can be easily painted on the Welding Flanges. The use of weld-through primer will help avoid any weld seam problems that may occur during the welding process.

Where Did Weld Through Primer Come From?

Weld through primer is a zinc-based product utilized in mating surfaces before welding. The product is designed to improve the surface quality and ensure a stronger connection between two materials. It has been used for years in many industries, including the automotive and aerospace industries.  

Can You Weld Through Weld Through Primer?

There are a few potential problems with welding through primer. First, if the weld is not made properly, it can create zinc corrosion that can lead to protection failure. Second, if the primer is not completely removed when welding through it, the weld may become stuck and cannot be undone. Finally, if there is not enough air circulation within the weld area, heat may build up which could cause a fire.

What Is The Difference Between Epoxy Primer And Etch Primer?

Epoxy primers are used in a variety of industrial and electronic processes to create a moisture barrier between the metal material and the air. Epoxy primers are often necessary for high-temperature, acidic or corrosive work environments, and for areas where an asbestos protection plan is required. epoxy primer applications can vary greatly, so it is important to understand the various types in order to choose the right one for your application.

The two most common types of epoxy primer are called “etch” and “self-etch.” Etch Primer is used to remove any etching that may have occurred while working with the metal. self-etch priming uses a self-etch system that leaves a permanent adhesive film on both surfaces of the metal. This allows both sides of the metal to be etched with ease, without leaving any residue behind.


In conclusion, the article “Weld Through Primer” provides essential insights into the purpose and benefits of using a weld-through primer in metal fabrication and welding processes. It explains the importance of proper surface preparation and the role of a weld-through primer in preventing corrosion and promoting stronger welds. The article also discusses different types of weld-through primers available in the market, their application methods, and key considerations when selecting the appropriate primer for specific projects. Overall, this article serves as a valuable resource for individuals looking to enhance the quality and durability of their welding work.