Mixing proportions of Interlux 2-part Epoxy Primekote by weight?

[JDCAVE]

I would like to know the mixing proportions of Interlux 2-part Epoxy Primekote by weight please. I wish to use less than the full one quart of total product and as the contents of the large can are putty-like, doing this by weight is much easier.

I have an email in to Interlux, but if anyone has experience with this please let me know.

Edit: If I knew the tare of each tin, the calculation would be easy!

Jim

 

[JDCAVE]

I finally got through to Interlux. Unfortunately he could not, or would not answer my question. “We do not recommend mixing by weight as the mixing proportions would be off.” GRRRR! I guess I will have to do the calculations myself! The problem is, the main component is not pourable.

I guess what I will have to do is tare a small container and weigh a measured quantity by volume for each of the two components.

I will report back once these calculations are completed.

Note, there is no density information on the technical product sheet.

Jim

 

[kchace]

I did a couple of batches of primecoat by weight and it’s definitely off. Fortunately it hardened ok, but found I was using too much of the hardener.

Ken

 

[JDCAVE]

Thanks Ken. For sure, you cannot use the same 3:1 proportions by volume to weight in grams.

I measured amounts by volume of the two components, using the indicated volumes on each of the two tins. Part A is 0.71 litres and Part B is 0.24 litres for a total of 0.95 litres (1 US quart) These are my results:

So I decided I wanted about 70% by volume of the one quart of total product, or about 500 mls of Part A and 169 mls of Part B. Part A weighed 700 grams and Part B 159 grams. Part B is 33.8% by volume but only 22.7% by weight.

I think this is useful, because all you need is a digital kitchen scale and any container. It doesn't have to be graduated. You can put any amount of Part A in the tared container, measure the weight and then take 22.7% of that weight and add Part B (which can be poured) to that number of grams. As indicated in the spec sheet, I added 25% Brush Reducer (2333N).

Horrible stuff to work with! Horrible odor! Part A is the consistency of putty and you have to wait 20 minutes before adding reducer and then stir again.

Jim

 

[kchace]

That’s great info Jim. I still have one complete kit of it, so it’ll come in handy. Unfortunately Interlux has discontinued production of Perfection which was my preferred 2 part paint and the main reason I used Primecote. I am switching to Epifanes 2 part which I have also used and also works well. I’ve purchased but haven’t yet used their primer. I’m thinking it’s much closer to the same thing as their gloss 2 part (except formulated as a primer) which would actually probably be a little better than Primecote.

Ken

 

[Bmarler]

I was a primecoat user too. Still have one kit left as well as some of the perfection. I’ll be switching to something more user friendly when it’s gone.
I didn’t have any issue at all mixing by volume. I just spooned it out of the can into a paint mixing cup, waited for it to level, then add the catalyst. 20minute induction time is a little excessive, I used ten before adding reducer.

 

[JDCAVE]

I should add that the 169 ml amount for Part B in the above example was estimate between graduation lines.

Jim