Nova Scotia Hunting Forum banner

Undercoating

4.8K views 82 replies 19 participants last post by  dreamwaters  
#1 ·
I have heard mixed results about undercoating. Some say it is necessary in places that use road salt, while others say it is more trouble than it is worth, especially for newer vehicles. The product Krown uses has been reported to degrade or damage electrical connections and rubber fittings and seals. I have experienced this and I know a few people who have.

Some suggest washing the car more often in the winter and skipping on the undercoating. Washing crusted salt off seems like giving the car an unnecessary salt bath, and if the temp is cold enough corrosion shouldn't occur anyway.

What do you guys think? Is it worth it, or have manufacturers increased the resistance to corrosion to an acceptable level?
 
#2 · (Edited by Moderator)
Sorry Nathan I have not had my pills yet today LOL

Can I ask a question?/ Do you still own a vehicle you bought 44 years ago and it looks like the day you bought it or just sold a truck you bought new in 1989 that has never been painted and ZERO rust regardless that it was driven in every winter here since day one that was undercoated EVERY YEAR

Who ever tells you it doesn't work or isn't needed living in the maritimes is clueless and I would like to look at the under gear of what they are driving

If you are leasing sure I would not but everything else gets undercoated

On the krown??? what did you actually see break down yourself and stop reading what the internet says

I have switched to krown from rust check since it came here on every vehicle we own and never an issue like you say with rubbers or electrical and normally I get to spray my own so probably use double what is normal for spray. I actually have a can I use for electrical connection when I cannot get the dielectric silicone in there

Right now it is on my 2008 truck, wife's 2017 rogue, daughters 2014 hydi, brothers 2017 ford truck, his wife's 2015 crv

five 68 impala, one 70 chevelle and a 66 impala

You cannot get away from the salt in NS even if you wash 5 times a day it is in our air all year long from the ocean

Sorry but when someone tells me rustproofing ( done right and every year) doesn't work or synthetic oil is not worth it I think you poor simple sole or cheap bastard

Cheers

Here is what krown does for you if you do it EVERY year which may do not.That is what the truck looked like when I sold it 4 years and yes I did grease all the chrome before every winter in addition to the krown. Super pain to get off in the spring but the truck was worth it IMO

JNnconY.jpg


Last summer when the wife got her new rogue. I listed here 07 impala on kijiji an impala that has been krowned since new. Also original paint It sold in 1 hour and I had three in a fight over it. The buyer took it to gm to be put on a hoist and the mechanic told him he has never seen a older one this good and if he wasn't buying it he wanted it. Asked if it was stored in a heated barn and never winter driven

It never seen a barn and seen every winter

ITZqAWA.jpg


jAl6kVb.jpg
 
#3 ·
Damn.. thats a real nice RAM!!

Love them 1st gens ...
 
#4 · (Edited by Moderator)
Damn.. thats a real nice RAM!!

Love them 1st gens ...
Me too bought my first new one in 85 a black 4x4 and drove it 500k . Didnot undercoat it like I should have every year and 5-6 years later it was scrap, roof gone in cab, box gone and frame broke

So when I bought this 89 I said it is going to get undercoated just like the old cars every year with first it was rust check and then krown

It was mint when I sold it and still is today other than he put a plow on it which it was his to do as he pleased

Seen it working last winter and it brought a tear to my eye

Cheers
 
#5 ·
Well, you clearly take care of your vehicles and I think the condition they are in can be attributed to that in addition to the Krown treatment.

I saw weatherstripping swell and then deteriorate. Krown has acknowledged the product can damage rubber, but states it can be prevented by applying silicon to the rubber before the oil application. If the person performing the service doesn't do this, then it's possibly to have damaged rubber.

I didn't say rustproofing doesn't work... I asked if it was worth it for newer vehicles.
 
#6 ·
I have had my vehicles rust checked for many years, works fine, but too much high pressure washing removes the product, so I am not convinced that it is necessary to spray off the salt frequently.

On my latest I had Canadian tire spray it with their product "Corrosion Free". Supposed to be better than others according to the hype, and friendly to rubber, plastic, wires etc. We shall see.

I broke my own rule against letting anyone at Canadian tire anywhere near my vehicle, hope I don't regret this.
 
#7 ·
Well, you clearly take care of your vehicles and I think the condition they are in can be attributed to that in addition to the Krown treatment.

I saw weatherstripping swell and then deteriorate. Krown has acknowledged the product can damage rubber, but states it can be prevented by applying silicon to the rubber before the oil application. If the person performing the service doesn't do this, then it's possibly to have damaged rubber.

I didn't say rustproofing doesn't work... I asked if it was worth it for newer vehicles.
Nathan IMO it boils down to how long do you plan on keeping it. If like 3 -5 years I would say no just go with the factory whatever is on it but if you want to get max trade in value or keep it for the long haul which we normally do yes undercoat it

I will have to check into the seals further but never did have an issue. That being said I do spray all door seals, hatch and trunk with silicone a few times a year but to keep windows and doors from freezing shut

Cheers
 
#8 ·
I'll probably get it done when I get a newer vehicle, just wanted some opinions. Some people have concerns with Krown drilling holes, but when they have done my vehicles they plug it properly.

Also, when do you think is the best time to get it done? I went to the one on Robie in Halifax and the owner stated spring is the best because cars don't rust as much in the winter because the temperature slows or stops the chemical reaction. Of course, he may have just wanted to get more spring time customers because the fall season is so busy. Either way, the product leaves a residue for well over a year from what I have seen.
 
#9 · (Edited by Moderator)
I'll probably get it done when I get a newer vehicle, just wanted some opinions. Some people have concerns with Krown drilling holes, but when they have done my vehicles they plug it properly.

Also, when do you think is the best time to get it done? I went to the one on Robie in Halifax and the owner stated spring is the best because cars don't rust as much in the winter because the temperature slows or stops the chemical reaction. Of course, he may have just wanted to get more spring time customers because the fall season is so busy. Either way, the product leaves a residue for well over a year from what I have seen.
I have always done mine in early fall for no reason other than

That way they have been washed all summer I hope getting as much of the old salt out of the cracks etc yet it is still warm enough in the days for it to creep. One thing for sure. DON"T let them spray it if the truck is wet or raining outside

YES they will tell you it doesn't matter but it does and huge

So much so they had to do mine twice two years ago

Cheers
 
#10 ·
Well, you clearly take care of your vehicles and I think the condition they are in can be attributed to that in addition to the Krown treatment.

I saw weatherstripping swell and then deteriorate. Krown has acknowledged the product can damage rubber, but states it can be prevented by applying silicon to the rubber before the oil application. If the person performing the service doesn't do this, then it's possibly to have damaged rubber.

I didn't say rustproofing doesn't work... I asked if it was worth it for newer vehicles.
Nathan. I try to take care of everything I own since I cannot afford to replace it today and if I do most stuff today doesn't have the quality of the older gear

Like to replace my truck is like 50k min .I didnot pay that for my house so I do what I can to keep it going as long as I can. I run 40 year old tillers and snowblowers etc etc

The thing I should be taking better care of is me and I don't do that very well unfortunately

Cheers
 
#13 · (Edited by Moderator)
Been doing it 22yrs. I still have a 93 chev s10 blazer that I bought 3 yrs old. Still has original steel brake lines, body mounts and e brake cables. My 09 Sierra has been done every yr since new. Gotta protect your investment as they cost too much not to. My brother has a 2007 Toyota that gets done every yr and looks like new from oil pan to aerial.
 
#16 ·
Ya, still seems worth it. I've only had experience undercoating older (98 and 05) vehicles and thought the newer vehicles addressed the rusting issues of the past. It seems like cheap insurance.

No clue on Diamond Coat. I would ask if it covers surface rust or perforation only. The variance on what is covered varies wildly between manufacturers.
 
#17 ·
Undercoat all my vehicles yearly....even my old used 07 Ranger...my local mechanic does it and he is very, very thorough....not sure what he uses but he will not do it on a wet day....will always bring it in the night before and let it dry before doing.....worth every penny on my mind as we drive our cars till they just can't go anymore...usually 400K plus on them before we sell...

Butch
 
#22 ·
Any you guys try Fluid Film for undercoating,takes about 4-5 cans about $20.00 a can
No way would 4-5 cans do my truck. Costs me around $170 annually to have my truck sprayed. Would cost a lot more to go with fluid film.
 
#26 ·
Back to the topic at hand, yes I would definitely recommend undercoating.

Bought too many used vehicles over the years that I did not undercoat and at 8 to 10 years the vechicle was worthwile saving mechanically but just nothing around it.

Stupid me for not spending $70 - $100 every early fall.