Weld Through Primer helps in lasting repairs to metal We can assure you firstly that Weld Through Primer is not a gimmick and actually works! …first, they are mostly zinc based, when applied to cover bare metal and seal out moisture and rust.

Does soldering through primer really work?

it helps to provide Permanent rust protection Inside edges of welded metal pieces. … allow the primer to fully cure before welding to ensure proper bonding of the zinc to the metal. After welding, remove any remaining penetration primer before painting to ensure the paint adheres to the painted surface.

Do I need to use a penetration primer?

The penetration primer is usually Zinc based Product applied to mating surfaces prior to welding. … In MIG welding, the penetration primer needs to be removed from the direct welding area before welding the joint.

What is the purpose of the penetration primer?

These primers are usually applied before the welding process.The purpose of the penetration primer is to Prevents corrosion and rusting of metal joints where two metal pieces are welded together, and provides permanent corrosion protection on the inner edges of welded metal pieces.

Can you spot weld through primer?

Penetration primer is still allowed for extrusion resistance spot welding, Toby said. Such a connection has enough current that the joint stays the same « whatever », he said. Of course, you still have to properly prepare the metal surfaces being welded, he said.

Does soldering it through the primer work?

25 related questions found

Can you spot weld through paint?

SCRS Board Member Dave Gruskos (Reliable Automotive Equipment) said: « Another big issue we see often is No welder is designed to weld through paint. « … The shop’s solution was to use a shunt clamp to create a circuit that would allow resistance spot welding through the e-coat.

Can you solder through e-coat?

Non-conductive coatings do not allow solderingThe most common of these is E-coat, a factory corrosion-resistant primer applied to every original and replacement body panel. Most of the E-coating on the mating surfaces can be retained when parts are replaced with STRSW by using a shunt clamp.

Is the penetration primer waterproof?

Solder primer is definitely not weather/waterproof. So far the best bare metal rust prevention I’ve found is a 1k etch primer.

Can you solder epoxy primer?

Suggest cleaning hole When using a solder primer. The fresher the epoxy in this soldered area, the more difficult it will be to solder. Point blasting is also very effective. I like to clean bare metal, solder, then coat…but some areas are harder than others.

What is an etch primer?

Etch primer is Single pack metal primer formulated with multiple resins to maximize adhesion to a variety of metal surfaces can use them. These primers contain small amounts of phosphoric acid to etch metal surfaces and improve adhesion.

Can you weld on zinc primer?

You can solder through it, but only if you lightly coat the zinc But I like to wear it in a couple of coats so it’s ok to wear. Then, once the welding is complete, the zinc can be pressed into the seam for more coverage.

What is penetration coating?

3M Solder Passthrough II

3M Weld-Thru II is a Convenient aerosol coating designed to prevent corrosion between welded metal surfaces.It has a zinc base to eliminate corrosion on bare metal, helping to prevent costly comebacks due to weld corrosion.

How to use self-etching primer?

For best adhesion, apply 2 or 3 thin coats And allow each coat to dry for 2 minutes before applying the next coat. Allow the last coat of self-etching primer to dry for at least 3-4 hours before wet sanding with #400 sandpaper, then dry sanding. Do not use near open flames.

What is the best copper primer?

Epoxy primers have the strongest adhesion to copper, although other materials will work.I recommend one Two pack epoxy polyamide primer. This will chalk on outdoor exposure and must be painted with weather resistant enamel. Architectural enamels are suitable for this application.

How to prevent welding from rusting?

Rust Prevention Tips

1. designed. The best way to prevent rust from overlapping joints is to not have any overlapping joints. Use butt welds instead. …
2. Use sealed welds. Your overlapping joints definitely have two sides, maybe four. …
3. caulk. Yes, use caulk to fill the spaces between the boards. …
4. Solder through primer.

Can you weld on painted metal?

Welding on paint is not wise. In fact, soldering and handling previously painted objects is quite problematic no matter how you look at it. First, it produces toxic fumes and excess fumes when welding. …Welders often grind metal to strip paint.

Can an epoxy primer be used on metal?

One Piece Epoxy Primer

epoxy primer Works best on bare metal Recommended for newly manufactured metal parts or metal parts that have been completely stripped. You can also apply a primer or filler over the epoxy primer to remove any small imperfections and create a flat surface before painting.

Can por15 be welded?

All welds and seams should be painted Por-15 (black) for rust prevention and the entire interior and bottom of the car. This is what a lot of people don’t know. You can solder through cured Por-15 If needed (as long as there is a good foundation).

Can you solder through por-15?

POR-15 Weld-Thru Primer can Applied over cured POR-15 rust inhibitor Coatings and all POR-15 topcoats for quick repair and recoating of these products. POR-15 Weld-Thru Primer also adheres well to steel, aluminum, stainless steel, brass and other primed and painted surfaces.

How to remove spot welding marks?

Use an angle grinder Remove the metal directly above the spot weld without burning through the panel. When you’ve removed most of the first layer of metal, use a punch or chisel and hammer to break up the rest of the metal.

Do you have to sand the self-etching primer?

In any complete restoration or body restoration project, you will sand the primer at one point or another. However, most self-etching primer manufacturers, due to the acid and alkali of the product, It is not recommended to directly sand the self-etching primer.

Do you have to prime the etch primer?

As a rule of thumb, self-etching primers Requires another coat of primer Completely seal everything long term. … urethane primers can be topcoated with most paints, so you will immediately eliminate any concerns about topcoat adhesion issues.

What is the difference between a self-etching primer and a filling primer?

Self-etching primer

Because it heals quickly, it’s the preferred method of bumping the store.But a key difference from etch primers is that You need to apply the filler or binder directly to the metal before spraying the metal.

What is a penetration sealant?

The penetration primer is usually Zinc based products applied to mating surfaces prior to welding. … »When spot welding panels, a spot sealant must be applied to the mating surfaces to prevent rust. » This means applying a weldable seam sealant when using extruded resistance spot welding (STRSW).

Do I need to etch primer on bare metal?

Epoxy primers and self-etching primers (self-etching primers) Available for bare metal. …if you’re doing some body work and you have some exposed metal, you don’t want to just put a regular primer surfacer, as it doesn’t have corrosive properties like epoxy or self-etching.