Building the houseboat

Treasonous talk!

 

Indeed, we are going in a forbidden territory.
Against my will, and under duress I will answer: no.
I have to confess using coal tar...............epoxy.
Coal tar as a great elongation, it is coal, it protect the steel and the wood. The epoxy additive was to make it drying. they started in the 1960 to transform the coal tar by adding epoxy as a coating for piping in the oil business.
Coal tar epoxy is not resistant to UV, but it is possible to overcoat it with an oil based paint.
The coal tar epoxy as the typical smell of tar, very pronounced, Several company manufacture it. I will not divulge the one I use.
I used on the lumber boat we built for the fishing trade, as well for steel vessel. It is a little the jack of all trade for commercial boat. the coat in any subtract should be 16mil, on two coat, quite difficult to pass. it is thick, and no way to pass on top to equalize. you have to do right immediately.
The total cure is 7 to 9 days, although it dry in four hours. the coal tar dry in two weeks and cure take two months and more. so the addition of epoxy was a good one.

About other epoxy, I have no idea. I don't use them.
Daniel

 

I was thinking about treating for rot resistance then encapsulating and sheathing with glass

 

The coal tar Daniel is using is a wee bit (actually quite a bit) different then the traditional coal tar epoxies. I will not let out the "progressive" nature of his brand choice, but suffice it to say he likes the stuff.

The original coal tar epoxies where the first epoxies to appear on the market. This was in the early 1950's, but didn't see much general use until the early 1960's. The biggest users were industries that had to bury stuff that had a tendency to rust, rot or break down from environmental or internal content impact. The under ground pipe industry still uses it by the 55 gallon drum. It's not as strong as marine epoxy, nor as stable and reliable, but it is substantially cheaper.

The stuff Daniel is using is a modified coal tar, where the coal tar portion is a significantly smaller fraction of the resin component (usually about 1/3 of the resin bulk). This makes it much safer for general use in public domains, but more importantly permits a high solids content and eventually isolates the tar in a resin matrix (after about 2 weeks of cure) and renders it inert. It's also slightly more costly then the pure coal tar epoxies, but I understand these can't be purchased without special occupational licensing now anyway.

 

Good try It is not the brand
Ok I tell you, it come for I-Paint
Do I have to give all my secret here
Daniel

 

BD.Net is like the dance of the seven veils. The revelation comes slowly.

 

don't worry, we'll keep your secret

 

thread drift...

During my short-term work in the gas line industry, the drums we had were labeled as Coal Tar Enamel.

The boiling brew was carried down into the trench to the fresh pipe welds in 5 gallon buckets. The lucky guy got on top of the pipe, sloshed some on the strip of tar paper the unlucky guys were stretching underneath the pipe, and then slowly pored it over the weld as the guys below wiped the lower pipe side briskly and then brought the tar paper wrap up and over. Then a quick blast of flame to melt a seal.

The fumes off that stuff would turn exposed skin black and eventually it would peel off like a sunburn. Nor did the cut-rate company I worked for provide any breathers or other protective gear. You brought your own stuff if you had any. And of course no one had any. Ah, the memories.

 

Ahy, you must be Irish. They get all the crappy jobs like that.

 

who wants to sneak over one night and slap a layer of fg and epoxy on the hull?

 

we could just all get some feather pillows and wait for a windy day

 

feathers are great insulation

i had a hen that raised a brood during the winter and one night i put my hand under her and then wanted to chase the chicks out and get in myself

 

would go well with all that hot tar on the boat

that way maybe Daniel could save on his heating bill

 

yup yup

 

tz tz....

lets not drivel Daniels nice thread down Mates.