DURETHANE DTM | 95-3300 top coat, what sealer to use on Aluminum boat?

CaptBob

CaptBob

New Member
I going to paint a Aluminum Boat with PPG DURETHANE DTM | 95-3300. I've sanded and cleaned off the old paint. The boat bottom still has the original color. Should I use a sealer over the project before applying the PPG DURETHANE DTM | 95-3300?
Thanks for the help Bob
 
crashtech said:
I always wonder how much of a gimmick DTM is. If it's so great, you'd think everyone would use it.
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Crash, about seven years ago, i sprayed a truck frame with a product made by rust oleum. it was called DTM but since it was a 1-1 part a and part b mix i would say it is an epoxy? i wouldnt think it has a practical application in most automotive painting but it has lasted very well on that truck frame. it was a very thick material. i'm wondering if "DTM" may be some manufacturer's name for epoxy? i find many manufacture's names for products to be confusing. a big reason i wound up here, i mostly understand what it is.
 
Treeslayer said:
Crash, about seven years ago, i sprayed a truck frame with a product made by rust oleum. it was called DTM but since it was a 1-1 part a and part b mix i would say it is an epoxy? i wouldnt think it has a practical application in most automotive painting but it has lasted very well on that truck frame. it was a very thick material. i'm wondering if "DTM" may be some manufacturer's name for epoxy? i find many manufacture's names for products to be confusing. a big reason i wound up here, i mostly understand what it is.
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DTM means "Direct to metal". It is used by many manufacturers with various different types of products. It doesn't mean epoxy or anything specific other than you can apply it directly to bare metal. It is not a standard, nor does it signify any type of quality. Just a generic term used by manufacturers.

Most of the time when it is used, it means a cheaper to make product than epoxy that will sort of adhere to bare metal. Notice how manufacturers always call epoxy, epoxy and leave the DTM part out? Usually DTM is some sort of modified polyester or urethane.

Mix ratios do not signify what a product is. If in question refer to the manufacturers technical data sheet and MSDS sheet to find out what the product actually is.
 
Chris_Hamilton said:
DTM means "Direct to metal". It is used by many manufacturers with various different types of products. It doesn't mean epoxy or anything specific other than you can apply it directly to bare metal. It is not a standard, nor does it signify any type of quality. Just a generic term used by manufacturers.

Most of the time when it is used, it means a cheaper to make product than epoxy that will sort of adhere to bare metal. Notice how manufacturers always call epoxy, epoxy and leave the DTM part out? Usually DTM is some sort of modified polyester or urethane.

Mix ratios do not signify what a product is. If in question refer to the manufacturers technical data sheet and MSDS sheet to find out what the product actually is.
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yeah, there is a lot of word foolery going on. just like "epoxy" spray cans. i cant see how a real epoxy can be already mixed in a can.
 
you know, i would bet here are thousands out there that dont realize what most of these primers actually are or what they are really for. i know i sure didnt. this place has to be the best source of easy to understand info i have found. thanks to all you guys that take time to explain in plain english. its more helpful than you know.
 
crashtech said:
IF a person was confined to spray cans for whatever reason, then such a product would be worth testing. Otherwise, it has no place in a professional repair environment.
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i suppose it may be better than regular spray bombs, for frames and such. i couldnt stand spray cans doing truck or trailer frames though, take forever.
 
off topic, but Chris' reply reminds me of some thing. any of you old enough to remember working with imron? it was a 1-1 part a part b top coat made by dupont. i very much liked working with it in my limited experience. i thought at the time i understood what it was, but now im not sure. was it an epoxy? are there other top coats made that are really the same thing? i guess this is why i got exited to find spi epoxy primer, because of the mix ratio and my belief that i understand what it is.........i admit a lot of whats in the tech sheets is really dutch to me. speaking of, what in dummy terms is the spi single stage? its not an epoxy? it is a urethane? its both? lol, yes i have read quite a bit and seem to get more confused all the time.
 
crashtech said:
SPI single stage is a high solids polyurethane.
The old Imron was a polyurethane also.
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this, i was hoping to hear. however, the spi ss is not 1-1 mix. perhaps i am simply over thinking things. in any event, its what im going to use because i believe it is the best option for me.
 
Mix ratios don't signify product type. There are 1:1 and 2:1 epoxies, and 1:1, 2:1, 3:1, and 4:1 polyurethane clears. SPI doesn't make any 2:1 products, though, iirc. Mix ratio doesn't really say anything about quality either. What it does say, you'll have to ask Barry, but it's really just how the manufacturer wants to put it together.
 
crashtech said:
Mix ratios don't signify product type. There are 1:1 and 2:1 epoxies, and 1:1, 2:1, 3:1, and 4:1 polyurethane clears. SPI doesn't make any 2:1 products, though, iirc. Mix ratio doesn't really say anything about quality either. What it does say, you'll have to ask Barry, but it's really just how the manufacturer wants to put it together.
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i didnt know this. so the ratio does not mean it is or is not an epoxy, or a poly. thanks for taking time to explain this crash, i appreciate it sir.
just knowing that spi ss is a poly does ease my mind, and perhaps that is enough. i will bug you guys some more no doubt in other threads to come.
positive note, i got done with air piping in the shop today. only one solder joint had to re do. and several threaded connections, but its all holding 150 psi now. old style grey pipe dope proved better than teflon tape and even teflon dope. i bet the tube i used was as old as i am.
 
Nason SS is 8/ .5 / 4
Transtar SS is 3/ 1/ 1
All I can recall at the moment.
So everyone is a little different.
 
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Our SS used to be a 1:1 mix, but a lot of complaining. I don't need 2 gallons, so I changed the nco to a 4.1
It is the same product, just a different mix ratio to make it more childproof.
Also eliminated the tech calls; I mixed it 4.1 instead of 1.1. Am I in trouble? Yes!
 
 
Barry said:
Our SS used to be a 1:1 mix, but a lot of complaining. I don't need 2 gallons, so I changed the nco to a 4.1
It is the same product, just a different mix ratio to make it more childproof.
Also eliminated the tech calls; I mixed it 4.1 instead of 1.1. Am I in trouble? Yes!
 
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Hi Barry. ha, i almost wish it still was. 1-1 just makes so much sense to me. maybe im strange or a dinosaur lol.
i have to commend you sir, on your products and your forum. i appreciate the plain english used here. and i really appreciate a made here product that dosent cost a fortune. and that i can order it direct from you. im not sure there is another product to compare out there. though i did have a good experience with tech bond recently.
 
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