Deck planking procedure

[Bob Cleek]

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[Bob Cleek]

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[Bob Cleek]

Duco is nitrocellulose dissolved in acetone. Nitrocellulose is gun cotton. There is no chemical reaction involved with its bond. Apply wet- in solution - when the solvent evaporates, the dry nitrocellulose is the bond. Acetone will reverse the bond.

A virtually cost-free substitute for Duco Cement can be made by dissolving styrene plastic in acetone to a dissolved solution reaches your desired thickness. This is a great way to "recycle" Styrofoam packing "peanuts," block packing materials and foam drinking cups, etc. Styrene plastic parts sprues can also be dissolved in acetone in the same way. Gasoline will also work, but I don't advise using gasolene simply because it has a flash point two to three times lower than acetone.

By varying the thickness of the resulting mixture as the plastic is dissolved in the acetone, one can create a waterproofing coating that can be painted on wood or used to "plasticize" cardstock, an adhesive equivalent to "thin" "regular" or "thick" consistency plastic model cement similar to Duco nitrocellulose cement, and so on. thickened mixtures can also be used for casting polystyrene parts. Store in a tightly capped bottle or, if you have one, a tightly capped metal container which will not break like glass if dropped. Obviously, mixing and storage in polystyrene plastic containers isn't advised!

"Drying" time is extremely fast, owing to acetone's high volatility. Acetone will reverse the bond, of course. Mix and use in a well-ventilated area.

 

[Bob Cleek]

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[Ted Robinson]

Not true in my experience. The vehicle for PVA is water. If a particular version is too thick, dilute with water. But not as much as might be imagined - Think in the range of 10% more water. PVA is acidic. The more water resistant is the final bond, the more acidic is the product. Titebond II is pH 3. Off the shelf vinegar is pH 2.4. The solvent that reverses a PVA bond is an alcohol. The most effective one is 2-propanol - isopropyl. Pharmacies here have 70% and 91%. The 91% is the better choice. Amazon has 99% Swan for $7/pt. if you wish to dissolve Shellac flakes in a solvent with a slightly longer wet time than 95% ethanol - Shellac thinner.
A PVA bond involves a chemical reaction - forming long chains. Alcohol untangles the chains but the reaction product stays the same new larger compounds.
There is white PVA - polymerizes water clear - yellow PVA - carpenters glue - polymerizes amber clear. It is more acidic and produces a stronger bond - Titebond II is a yellow PVA with additives for a water resistant bond - LA may not know from humidity, but over here on the southern Atlantic coast we do. Titebond III is forms a "waterproof" bond - It polymerizes brown. It is pH 2.5. (If it was something that is made of wood and I would float in it - I would still use resorcinol glue - something that would set your political nannies hair on fire.) There is a pH 7 white PVA (bookbinders). This is for rigging that is plant fibers twisted up.

Duco is nitrocellulose dissolved in acetone. Nitrocellulose is gun cotton. There is no chemical reaction involved with its bond. Apply wet- in solution - when the solvent evaporates, the dry nitrocellulose is the bond. Acetone will reverse the bond.

Do they allow rubber cement? The solvent - thinner is n-heptane. (7) gasoline has octane (8) - Are you allowed gasoline? Jibes aside - quality rubber cement like True Test is excellent for fixing patterns to wood. Coat both surfaces - a significant and through coat - let dry - stick together - no adjustment - instant bond. Your thumb can completely remove dry rubber cement from a wood surface. Rolls into rod.

This is also the same process with contact cement - DAP Weldwood contact cement - which is a really poor choice as a model component adhesive, a really really poor choice. In construction, it is good for any bonds that you do not mind coming apart after 20 years - it probably oxidizes to become so brittle.

I would not touch CA with a ten foot pole. It uses water as its reaction catalyst. I am having the thought that the more water the wood has at its surface, the quicker is the CA reaction. It has volatile components that are decidedly unhealthy. You cannot get acetone but can you get CA? If yes - there is a strange sort of logic involved. CA has a strong vertical bond (pull apart). The lateral (sheer force) bond strength is not so good. Acetone will reverse its bond. Perhaps the humidity in LA is low enough that a bottle of CA will not start reacting in it container as soon as it is exposed to the atmosphere?

Thank you for the primer on glues.
Your tongue in cheek brightened my day.
Our nannies allow/regulate that alcohol is in our gasoline. Irony is totally lost on them and their hypocrisy is never recognized.

 

[DAWarden-(Jaager)]

I can't but denatured alcohol in los Angeles county

Denatured alcohol is 95% ethanol with an added emetic chemical to make ingestion an unpleasant experience. It is exempt from the moonshine tax. Your local liquor store sells the same 95% ethanol without the emetic but with the tax. Everclear? When I was a pup it was Pharmco grain - involved in tall frat tales about what purple passion could do.

Ethanol and water produce an azeotrope. The highest concentration of ethanol possible from simple distillation is 95%. Going the extra step of distillation from benzene (or whatever) will produce 100% ethanol. Unless it is in an atmosphere with zero humidity, as soon as it is exposed to the atmosphere, water vapor will migrate in and reform the azeotrope. In probably not much time it is back to 95% ethanol. To be practical, 100% ethanol is probably not worth the time and expense.

 

[Ted Robinson]

As a fellow Californian, I share your frustration with the unavailability of many once-common products, primarily due to air quality control ordinances limiting the sale of high-VOC content solvents in "The Land of Fruits and Nuts." (In the spirit of full disclosure, we do have serious air quality issues that we have to stay on top of.) Nevertheless, I'm surprised by your report that you cannot purchase denatured alcohol in Los Angeles County. A google search indicates there are no prohibitions on denatured alcohol in California or locally in Los Angeles County. It is not at all restricted in the San Francisco Bay Area where I live and we've got the some of the strictest restrictions in the nation up here. "Denatured alcohol" is also sold labeled as "alcohol stove fuel" and fuel for chafing dishes and the like. I keep pretty close tabs on what's available in the solvent department of local hardware and paint stores. I'd urge you to take another look in the paint department for denatured alcohol which is usually sold in quart, gallon, and five gallon cans in most every place where paint thinner, acetone, and other solvents are sold. The methamphetamine chefs are still buying acetone in five gallon cans at the local Ace Hardware stores, so I expect alcohol is still available. If not, grab a gallon can at any paint or hardware store the next time you're out of LA County. It's a workshop staple.

I only checked online at Ace Hardware and Home Depot.

 

[uncchains]

Do you desolve the glue with acetone.
I can't but denatured alcohol in los Angeles county. We're being "protected" by our mayor and governor.

Curious- Can one buy fingernail polish removed in LAC? That has Acetone in it, granted a bit diluted, but it will dissolve CA, just not quite as fast as straight Acetone. Someone mentioned vinegar. Stores like Home Depot and Lowe's, and maybe TrueValue and Ace as well, sell 30% for weed control (1gal. jug). I also use vinegar (white, distilled) instead of MicroSet for setting decals. Much cheaper.

 

[Ted Robinson]

Curious- Can one buy fingernail polish removed in LAC? That has Acetone in it, granted a bit diluted, but it will dissolve CA, just not quite as fast as straight Acetone. Someone mentioned vinegar. Stores like Home Depot and Lowe's, and maybe TrueValue and Ace as well, sell 30% for weed control (1gal. jug). I also use vinegar (white, distilled) instead of MicroSet for setting decals. Much cheaper.

We can buy finger polish remover. That's what I have been using.
No logic behind their rulings.
I live in the San Fernando valley in LA.
Our last administration dumped almost one million illegals here in the past few years. They turned our city into a hell hole.
We don't want to move out of state away from the grandchildren.