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

[Treeslayer]

I think many plumbers use teflon tape and then apply some sort of paste/dope over it. Works very well

the funny thing is, the joints threaded together farther with the old dope. i think its thinner and lubricated the threads better. im just happy all those solder joints didnt leak.

 

[Jim C]

i have sprayed quite a bit of the old imron in the late 90's early 2000's and i dont ever remember it being a 1:1 mix. that old imron was i believe 3:1. stuff kicked off rock hard. far harder than the paints of today.

 

[Treeslayer]

i have sprayed quite a bit of the old imron in the late 90's early 2000's and i dont ever remember it being a 1:1 mix. that old imron was i believe 3:1. stuff kicked off rock hard. far harder than the paints of today.

late 80s. early 90s for me. it came in two 3/4 gal cans. i used a little bit of centari also, it sprayed nice but wasnt as durable. it was 3 or 4 to 1........hard to remember now. we had a 72 KW some one painted imron on in the early 80s, when we sold her in the early 2000s it looked just as good as it ever did. i now have a 81 frieghtliner factory imron and it cleans up well. that was good paint. if spi is half as good i'll be happy. if i can get along with the newer spray guns, but thats another topic.

 

[erover82]

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!
 

Wouldn’t 1:1 be preferable in that you get more end product for your dollar? You’d use less of the primary, more expensive, component.

 

[crashtech]

Mix ratio has little to do with per-ounce cost. One of the least expensive products I use is a 4:1 urethane that can accept varying amounts of reducer. It's all about component cost and knowing how to figure actual per-ounce RTS (ready to spray) cost.

 

[Chris_Hamilton]

Coverage is another factor to consider. Example take PPG Omni+. It's lower priced, mixes 1:1 so to the uninitiated it seems like a good value. Problem is it takes 4-5 coats to cover and the toners are not great. Metallic toners are really low quality in Omni. Compare it to Motobase which also mixes 1:1 and costs just a bit more than Omni+. It covers in 2 coats usually 3 max and toner is high quality, metallic is excellent. Actual cost when you compare how many coats needed, Motobase's actual cost is about half RTS than Omni+ RTS. In other words a 1/2 gallon of Motobase will go about as far as a gallon of Omni+. Cheap base is never a good value.

 

[crashtech]

Base coat is where something like 60-70% of my liquid material budget goes. It's really gotten insane.

 

[erover82]

Fun reading restoration journals from the early 2000s where they complain about the cost of paint supplies being $400 total.

 

[crashtech]

To be fair, that was 20 years ago. But prices have really shot up in just the past few years. Like close to double in some instances..

 

[Barry]

Wouldn’t 1:1 be preferable in that you get more end product for your dollar? You’d use less of the primary, more expensive, component.

Yes, BUT it's the guy doing a car at home who bought a gallon kit and now needs a quart and did not want 2 gallons.
Some just screamed upfront about buying 2 gallons.
It's just another tough decision we make, and not everyone will agree, but we must look at space to stock stuff and the labor to make quarts and turns.

 

[Slofut]

i have sprayed quite a bit of the old imron in the late 90's early 2000's and i dont ever remember it being a 1:1 mix. that old imron was i believe 3:1. stuff kicked off rock hard. far harder than the paints of today.

Painted my first boat with Imron in 1975 when I was 15yrs old, black and white, the black looked like a black mirror. When we sold it about 2001 it had just started showing signs of uv degradation. My Jag XJc coupe I painted in 1994 with red Imron and the pdr guy last week thought I had just painted it, spent most days indoors though. That said, if they still made the orignal Imron, and I was painting anything other than a large sailboat that would live in the water, I would use SPI hands down, no other questions or decisions for me. You'll never get as fine and durable a finish with anything else.