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Forum topic by Biggamefish posted 02-14-2020 12:10 PM 225 views 0 times favorited 5 replies Add to Favorites Watch
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Biggamefish

67 posts in 2051 days


02-14-2020 12:10 PM

I had a burl that I started to turn and it had some big empty spaces where the bark pulled off. So I had some alumilite clear casting resin that I have used on small projects. I mixed it per instructions and poured it in a make shift container.
The problem now seems that some of the edges are soft. I am afraid that the middle might be soft too. Just looking for some insite on what other people have seen that have used this stuff

-- ><((((º>`·. .· `·. .· `·... ><((((º> · `·. . . . .· `·.. ><((((º>`·. .· `·... ><((((º> 


5 replies so far

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John Smith

2174 posts in 794 days


#1 posted 02-14-2020 12:32 PM

what is the ambient temperature of where the project is ??
if you have used Alumilite before, you should be familiar with the product.
have you experienced any softness in your previous projects ?
a little more info on the age and storage of the resin will also help.
I got a small kit from Michael’s a few years ago and had satisfactory results.
(I like it for the convenient 1:1 mixing ratio).
I would suggest to warm it in the sun or low heat oven. (90 -100*f).
give it a few more days – test it occasionally for hardness and cure.

is the burl fully encapsulated in the resin or just to fill a few spots.

.

-- I am a painter. That's what I do. I paint things --

View Nubsnstubs's profile

Nubsnstubs

1670 posts in 2362 days


#2 posted 02-14-2020 01:38 PM

Alumilite clear casting resin has a 90 day shelf life, I believe. I had some and after 4-5 months, I used what was left from a previous pour. It and it didn’t cure. Isn’t it supposed to be used under pressure also? Please correct me if I’m wrong. ...... Jerry (in Tucson)

-- Jerry (in Tucson) www.woodturnerstools.com

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John Smith

2174 posts in 794 days


#3 posted 02-14-2020 02:32 PM

Jerry, you are correct.
the shelf life is 90 days from the mfg. date for optimal results.
I called Alumilite and they said that properly tightened lids and
stored in nominal conditions will achieve satisfactory results.
after 90 days, no matter the storage conditions, the material starts
to degrade and will give “less than” satisfactory results.
(which is common for a lot of two-part resins).
as for storing under pressure, it does not make a difference in shelf life.
a vacuum and/or pressure pot will reduce any problematic bubbles after mixing.
when used and stored correctly, it is a very good product.
I used mine in about 2 weeks – so I can not attest to an uncured product.

BigGameFish: if this is an important or valuable project, and you want to salvage it,
call the TechDept at 269-488-4000 for possible options.

.

-- I am a painter. That's what I do. I paint things --

View poopiekat's profile

poopiekat

4590 posts in 4366 days


#4 posted 02-15-2020 04:31 AM

The only thing I can add to this discussion is this: I went against the rule specifically mentioned by one user of casting resin: Pour part A and Part B into each measuring cups, mix in your tint (if any) then mix both components together into a bigger cup.

In my case, I needed just a speck more so I went back to the original A+B cups and scraped them out and mixed the scrapings together to what I figured was a still a 50-50 mix. Bad idea..that was two months ago, and the pour is still tacky in the molds I had prepared.

Toss your A+B cups away once you have combined your blend together in the 3rd cup. The residues are unusable.

-- Einstein: "The intuitive mind is a sacred gift, and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift." I'm Poopiekat!!

View Biggamefish's profile

Biggamefish

67 posts in 2051 days


#5 posted 02-15-2020 02:45 PM

John,
Thanks for the insite. I actually brought it my house because my shop is so cold so everything was warm. I think my problem might be the shelf life I think the alumilite might be about 6 months old. My project is hard on 97% of the surface. Just some edges are tacky. Mostly where the edges are really thin.i just dont want to start turning it and get into a soft middle and get into trouble on the lathe. The alumilite is only on one side and this was just a try project nothing of super importance. I will try to take a picture when I can.

-- ><((((º>`·. .· `·. .· `·... ><((((º> · `·. . . . .· `·.. ><((((º>`·. .· `·... ><((((º> 

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