HOW TO: Apply Weld Thru Coating

[@SkaterStimm]

Finally a video that really shows how to use this stuff.

[@taxicamel]

Yeah ....10:19 ....when this could have been fully explained in one minute.

[@jorgerosales609]

Finally a video that makes sense.... im a DIY guy and while repairing my 2021 Honda Pilot which i had to replace multiple panels and then weld them together, i read the katest version of Honda collission repair manual and it explicitly say " remove WTP from the weld zone before PLUG welding"..... but then i asked the places were i bought the WTP and they said like if i was a moron.... " It says WELD THRU PRIMER" so you should be able to weld RIGHT ON TOP OF IT...and laugh at me like if I had 2 heads...... I feel vindicated now and can stop ny psychiatrist visits.....feel a ton of emotional pain left my bidy cause the "EXPERTS SAID.... see this is why people should let the EXPERTS do it and bot a DIY sunday guy..." well who is laughing now Mr. I SELL WTP and i know nothing about how to use it guy..... 😢😢😢😢😢😢 Sorry guys had it in my heart for years and needed to rant 😂😂😂😂😂😂

[@TheOneTrueHeavy]

if youre not supposed to weld through it and its not a primer, why do you keep calling it weld through primer?

[@larryreno8293]

Exactly… why is it called a weld through if you don’t weld through? What about if you’re spot welding instead of plug welding?

[@whatfreedom7]

Haha true

[@petar443]

Thanks Shawn. I miss the collaboration videos with Collision hub. I hope you guys do some more this year.

[@JustArandomDude11c]

you added another contaminate at 7:00 in the video.... the red sharpie ink on the edge of the plug holes....

[@jrnessly6651]

Second coat of contaminant if you count the primer on the edge of the same hole. Third of you count the primer that weeps into the hole every time you weld.

[@flyurway]

Informative. You can kill the music any time though.

[@samg5543]

What about spot welding thru this stuff? I have seen conflicting info.

[@shawncollins5821]

Spot welding through is perfectly acceptable unless the OEM specifically states not to, which I am not aware of. The compressing action of the spot welder prevents porosity that MAG welding can encounter in a weld puddle. Always make destructive weld tests and make sure the spot welder is adequate. Many spot welders have settings for welding through zinc coatings.

[@thatbiguy1975]

@@shawncollins5821 nice to hear this, exactly why i watched the video only to find an answer in the comments

[@fuelfilter]

Thank you for the explanation.

[@jeremyr7147]

Fk i need some of that spark protection paper! Got to do a floor rust out in the car with interior in place. Tips Guys - on lower pinch weld attach panels drill a tiny hole at each plug weld to locate it. I tape the flange, cut nickle sized circles on each plug weld leave the circles behind. Epoxy prime the rest, pull tape then spray weld through over the whole flange, its not going to hurt the epoxy.. then I clean in the 5/16 plug weld holes with broken bit. I just dont trust this stuff alone to much wash out between welds, or it would be used in other places.

[@midnighttutor]

I sprayed some of this on rust treated metal today and followed all directions including extensive shaking of the can and two coats. On some areas I have a hard silverish coating and some others I have a gray powdery coating. Can you please describe what the proper coating should look and feel like?

[@roger55es]

Would be a idea to have a strip down view after a corrosion test say 12 weeks o so

[@dohc1974]

I guarantee you there is corrosion in between the panels if you use this product the way this man showed. This is a Band-Aid, it works fine in repair shops. Most people aren’t going to be holding onto that car forever. You cannot achieve perfect corrosion protection unless you’re able to dunk the whole car into P solution like the factory does.

[@stevejanka361]

Really good stuff. Very useful information. Thank you and take care.

[@edyy6619]

It should have been called weld around primer

[@SixTough]

Weld Around Primer* (*not a primer)

[@ajd5363]

What’s the point of weld through coating if you grind it off before welding? Why not just use 2k primer?

[@3MCollision]

Hi Anthony. You should only remove the Weld Thru Coating from the immediate weld zone. In other words, only from the plug weld hole when plug welding. Or only where your weld will cover the Weld Thru Coating anyways. Hope this helps!

[@jamescook2251]

@@3MCollision doesn't help! Still makes no sense. It's called "weld through" not weld near!

[@tofly383]

@@jamescook2251 i totally agree. If the weld through primer is a contaminant whats the benefit in using it? May as well use any other primer.

[@shawncollins5821]

You are only cleaning it from the area that the weld will be covering anyways. Then the zinc is surrounding the weld zone and transferring the electrons to protect the steel. Extensive testing has shown other coatings without zinc will not provide the electron transfer and sacrificial protection the OEMs require.

[@peteolson4287]

​@shawncollins5821 why doesn't oem use it then?

[@YoungHeartedSoul]

@7:15 Weld thru primer is a misnomer sir. Please call it weld thru coating.

[@shawncollins5821]

Hard habit to break 🤣

[@Gunnl]

so I am confused now.. since this weld through primer, is not weldable and is not a primer,... let's imagine that was a frame rail and that after welding you wouldn't be able to reach it for painting... what product should you then use !?

[@bencolpitts6923]

True you can't weld directly on it, you can use a resistance spot welder leaving the mating surfaces covered with the primer. Internal frame coating can be used if you have inaccessible areas that require protection, Mig Spot/plug welds can be ground/sanded if needed & then cleaned and primed with a product that is compatible with the top coat.

[@bencolpitts6923]

Why not paint the frame rails first? It's tedious with having to tape the sections off paint then tape again. I tape the flanges and then paint the internal channels. Then remove the tape, clean the flanges and spray the weld through on the flanges mating surfaces.

[@mikenelson2848]

Why remove the original ecoat and replace with weld thru if your going to grind it off at the plug weld points.. what if your using STRW . Why did they call it weld thru if your grinding it off? Zinc boils out at 1200 f copper doesn't boil well beyond the steel melting temperature plus it conducts electricity better to let it be a actually weld thru product..

[@bowesman1000]

i sold for Wurth for like four years and sold some of their zinc weld thru primer, plus all the competition had it. i used to laugh at why the can would sit in their cabinet or just get dust and overspray on it for months and even years and no one would ever use it. i see now it was because they were afraid to because they didn't know how. a good sales rep would have told them or held a clinic what have you. there are thousands of little two or three technician body shops out there just blasting cars together without using this. you don't rally need it, you just need it to do it right. it doesn't have to be perfect, it just has to look better.

[@dohc1974]

So basically what you’re implying is that it just needs to look good from the outside, because longevity doesn’t matter since the car will either be sold or crashed in the near future, releasing the body shop of all liability it previously repaired

[@5093329225]

this is the stupidest video instructions ever. so you have to spray it on a surface to cover it but then he says it doesn’t adhere to surfaces well and you have to wipe it off, whats the point then ? second he’s like hey this is not a primer its a coating then proceeds to call it a primer through out the rest if the video. And the name of this product has nothing to do with its actual use. you should have called it sacrificial spray or galvanizing spray. no wonder people have no clue how to use it i mean if i used it as its name suggests i would coat two parts and weld them together even with the coating on the welded area.

[@tarbash27]

Actually, this video makes 100% sense, who knows what your talking about.

[@5093329225]

@@tarbash27 someone with an engineering degree and NACE CIP level 1 certification would know what im talking about 👍🏼

[@gadnuk7159]

You’re literally only complaining about the name of the product… because of the video you know what it is and how it is used. If it doesn’t do what you want go find something else. The video was very clear idk why you’re so hostile

[@Lester-Paul]

Is there a primer that can be applied to the weld through? There are aftermarket body panels such as mustang cowls and floor pans that come pre painted with 3-M weld through. This video implies it should all be removed in exposed areas prior to painting.

[@shawncollins5821]

Any coating that can be wiped off with a solvent should be wiped off areas to be painted. Only an epoxy primer or an etch primer followed with a 2K epoxy or 2K urethane primer will provide good adhesion on bare metal. Refer to the paint makers data sheets.

[@jimdrechsel3611]

If you are welding to a subframe flange and covering the area anyway do you still need to mask of the area? Will the weld thru primer lift paints if it is sprayed on top?

[@shawncollins5821]

It will not lift paint. But if you spray a rustproofing in that area it may not stick well.

[@bencolpitts6923]

Paint will not stick well to weld through primer. Follow instructions on the can. Whenever painting one should make certain that the products, primer top coats etc, are compatible. If at all possible stay with the same line of products.

[@jeff666p]

isn't the point of a weld thru primer to weld through it? Why Is it called weld thru primer if you shouldn't weld thru it?

[@flearoy6366]

what clamps are those you are using?

[@regcotterill7332]

They are Cleco clamps

[@LastChanceAmerica]

What clamps were those

[@bencolpitts6923]

Cleco clamps

[@garysgarage.2841]

I stopped using this stuff a long time ago my cars only see dry weather anyway haven't had any problem with rust. If I was repairing a daily driver I'd probably go the extra mile just because it's gonna see winter weather conditions.

[@rubengranadosmarquez9790]

Necesito saber los precios por favor

[@RobertBrown-xt8qn]

great videos. good content. i could live without the blaring music.

[@tiredrummertube]

Why such an ironic inappropriate name then!!? Why not call it "weld overcoat" !

[@padraicmcguire108]

You probably want to delete Kevin Tyler's post. Not really 3M's style.

[@Captain1717Q]

So it defeats the purpose if you want to keep your weld as corrosion free as possible if you spray it on then you take it off I mean...

[@bencolpitts6923]

After welding you can apply a rust prevention.

[@maxjordan2625]

Wish i would of watched this video before buying, so i would know NOT to buy this!

[@yogishgubbi6133]

TOTALY WASTE OF TIME..

[@fstarockaburns425]

holy smokes dude!! can u get to the INSTRUCTIONS? We dont need to hear about zinc!!! 10 minutes? surely this could be a 2-3 minute video- so much unnecessary info kills 99% of peoples ability to concentrate.

[@jorgerosales609]

Are you nuts...? Gave you read the comments? Not even with his explanation about Zinc people understand hiw it works.....imagine without it 😂😂😂😂😂