For the most part Poly follows the price of oil(which currently is in the $70's). Over the last 3--4 years a 55 gallon drum has hung just below $1000. When it gets up in the $1300-- $1400 range glass shops feel the pain. And with a little math, it's not hard to figure how much profit there is in a Five gallon plastic pail. There is often a short lag between a barrel of oil increase and an increase in the cost of a drum of Poly. This is due to the raw materials on hand at manufacturers and already refined Poly sitting in warehouses like Fiberglass Hawaii, Rev-chem etc. Sort of like when the price of oil goes up, but isn't reflected at the gas pump right away. The filling stations have gas on hand that they paid an earlier lower price for. But some filling stations will immediately raise the price no matter what they paid and before they have to pay the higher price.
That which can be assorted without evidence was read in an illegal magazine.
I'm not enough of an insider to know; But my theory is that the real cost with Epoxy is the Part B, not the Part A. The Part A (resin) is the custom part of Epoxy. That's the Part that manufacturers tweak and customize for various applications. The Part B (hardener); is most likely Not manufactured by people like Resin Research, Dura Clear, Wet Systems etc. Instead it is most likely purchased by those companies from larger corporate manufacturers. If so that would mean that the Part B is the component that all Epoxy manufacturers have the least control over when it comes to supply and price. I would wonder also about the manufacture process of Part B. Is it a Petroleum product? When I buy Epoxy the Part B Hardener is 30% more expensive than the Part A resin. I think I am on to something here.
About a month or so ago, I heard that ProWall which manufactures the EPS billets sold to US Blanks and other manufacturers, has raised their prices 50%. So wire cut EPS blank prices are going up also.
Would be cool if someone with insight in the industry or better the chemistry replied... Just for educational purposes.I tried to think it through, but I guess I'm way too undereducated to get to a valuable point. It seems that there is a wide variety of matter that goes under the subtitle epoxies...
I don't think it's only the resin that gets modified.
Curing time for example..
Many systems use the same resin with different hardeners to get fast or slow curing.
UV stability, viscosity, surface quality etc is in the resin, but those things seem to be just additives that have nothing to do with the chemical reaction that is the initial curing.
I remember someone saying on a trade show that all the basic resin on the globe is manufactured by a handful of big factories, but don't know if that was reliable source.
Where is Greg Loehr...
Read my post further on regarding Part A vs. Part B. You don't have to be "educated" to understand simple "Supply and Demand". I am pretty sure that how fast a harder (Part B) sets is relative to the percentage of active ingredient. More=faster. Less=slower. So hardeners are most likely generic and not customized. Contributing factors would be COVID-19, dependency upon foreign resources, labor shortages, and the simple fact that there is pent up demand.
I hear what you say, but don't get it.
Epoxy is said to be different from poly resin, where more is faster acting as a catalyst.
With epoxy more is just worse, not faster.
From what I know all epoxies resins are more or less same base ingredients with additives. Resin producers make their cook. Base is reaction of bisphenol A or F with epichloridrine thanks to an amine, there is many kind of amine. Additives are for UV stability, elongation to brake/stiffness/strengh modification, viscosity.... For example I add propylene glycol and benzyl alcool in my resin that increase elongation to break, reduce viscosity, tg and stiffness. I have some connected to epoxy function that react with main system so I can add more with less impact on tg and more visco and flex but harder to find and higher cost.
Just spoke with one of my buddies who just received a 1-1/2 gal kit of the Fiberglass Hawaii Aluzine. He said they charged him ~$230 including shipping (from Ventura to Santa Maria ~ 1-1/2 drive). I was shocked. I thought i paid about $125 for the same kit a couple years ago.
Less than a couple of years ago. That's $152 per gallon. I misread your post.
Found the Crowns "Mas Fina" at Safeway tonight.