Re: epoxy primer inquiry

hi,

just this afternonon, i bought myself a set of epoxy primer from cord. unfortunately (stupid me), i forgot to ask if it can be mixed in a plastic disposable cup (the one use for parties) or styro cups (for hot liquids).

any experience?

Just don't use lacquer thinner with the styro cups, they'll melt. Although lacquer thinner works with epoxy based paints, Cord also sells a reducer specifically for epoxy but it is a bit expensive. I'm not sure if it is compatible with styrofoam, sorry.

Re: epoxy primer inquiry

Just don't use lacquer thinner with the styro cups, they'll melt. Although lacquer thinner works with epoxy based paints, Cord also sells a reducer specifically for epoxy but it is a bit expensive. I'm not sure if it is compatible with styrofoam, sorry.

yup, i also find it expensive... its 234/L. maybe i'll just use my used coffee cups (the paper based ones). i'll won't be reducing the primer. i'll be using a 3:1 ratio pure.

speaking of lacquer thinner, is it a good solvent to use for cleaning the brushes?

Re: epoxy primer inquiry

Hmmm ... I've never really tired it with epoxy paint come to think of it ... but I use vinegar to clean off pure laminating epoxy.

Re: epoxy primer inquiry

I am wondering the same thing, epoxy used for lamination vs. epoxy used as glue vs. epoxy used as paint. Two-part epoxy is two-part epoxy? Just differences in additives, e.g, thickeners, pigments?

As another data point, I put a brush used to apply epoxy floor paint in vinegar overnight. Next morning it was completely clean, almost like new.

Re: epoxy primer inquiry

I believe they are all the same basically.

Here's another data point: regular epoxy will wash off in water while it is uncured. My brother-in-law and I discovered this while epoxy coating our fish tank. My theory is that the water dissolves the fillers in the regular epoxy.

Don't think of using vinegar to thin epoxy paint though. It won't work. Vinegar interferes with the chemical bonding between the hardener and resin. So if you use vinegar to thin the epoxy paint, the paint will never cure.

Re: epoxy primer inquiry

i called up cord this morning.

- styro cups and those disposable plastic party cups will melt with epoxy primer. epoxy primer still produces heat while curing
- paper cups can be used, but will eventually absorb the liquid
- bottled water and 1.5L/2L softdrinks bottle can be used
- for cleaning, lacquer thinner can be used followed by white vinegar; however, best is the multisol reducer (not an option for me)

as for the mixing container, i'll just be using the complementary glass mug given to us... :P. i'll just clean it well so that it'll be ready for future uses.

Re: epoxy primer inquiry

Hmmm there might be some misunderstanding somewhere.

I've mixed a lot of Cord Stronghold 200RSC in styro cups and bowls. RSC200 is is pure epoxy - no fillers whatsoever. The heat they are talking about comes from the chemical reaction of the epoxy as it cures which is normal. So unless they're adding something extra to their paints that dissolves styrofoam I'd say it should be ok.

By the way, I used to buy Multisol by the gallon but not anymore.

Re: epoxy primer inquiry

what i got was the fpr, i am not sure if the rsc200 is the same as the fpr. isn't it the rsc200 is for laminating? the fpr that i got was for painting

Re: epoxy primer inquiry

what i got was the fpr, i am not sure if the rsc200 is the same as the fpr. isn't it the rsc200 is for laminating? the fpr that i got was for painting

Yes, RSC200 is for laminating but it is basically just pure unfilled epoxy. Now that I think about it more, it could be that their paints include solvents that are not compatible with styrofoam ... maybe it has some Multisol.

Re: epoxy primer inquiry

You can use those thin metal containers sold in grocery stores for making, what is that, 'leche flan'? Many different sizes available.

Re: epoxy primer inquiry

Microwave containers will work though they are a bit expensive. Paint centers will also sell you the metal cans they repack paint into.

Re: epoxy primer inquiry

i used my coffee paper cups in the office... those things worked perfectly... no leaks, no problems of any sort...

to test further, i left my used cup (with a few ml's of activated primer left) and put them under the sun together with my primer'ed metals... again no leaks of any sort... so i guess those paper cups will do well. the only thing here is that i didn't use any reducer because i need to replicate a high build primer. quite pita to spread if brush dries out, but i'll just leave it for a follow up sanding so no issues here.

btw, i also use the same paper cups for polyester resin and they are perfect.

the sole reason why i like to use these cups is that once "recycled" as mixing containers, its just a mater of disposting them... no further cleanups necessary.

Re: epoxy primer inquiry

That's good info bro. Whenever I've done paint work: epoxy, acrylic, enamel, I've had to look for those PET bottles (softdrinks, bottled water, etc). I keep a stock of the containers I mentioned before my laminating epoxy work but I'll try getting a stack of those paper cups too.

Re: epoxy primer inquiry

That's good info bro. Whenever I've done paint work: epoxy, acrylic, enamel, I've had to look for those PET bottles (softdrinks, bottled water, etc). I keep a stock of the containers I mentioned before my laminating epoxy work but I'll try getting a stack of those paper cups too.

i only use large containers if i need to mix really big batches. usually i only have small projects so i usually settle with paper cups.

btw, if you still got a small kid who drinks a lot of milk, the cans also make a good mixing container and can hold up to acetone and lacquer thinner... hehe i keep these and use them for cleaning the not so cheap brushes that i have 😛