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HS3
Apr 7, 2021 10:40:42 GMT -5
Post by Willam Gross on Apr 7, 2021 10:40:42 GMT -5
Im having some issues with HS3 I've been using it and HS2 for over the past 10 yrs now and lately its been very thick and curing very fast during mixing time im not making large mixes but still having the same result big or small batches Im not sure if its since another company purchase Alumilite or what but the HS3 is much thicker than my last batch I purchased over a yr ago so I guess my question is ? Is their a way to thin the HS3 out?
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HS3
Apr 7, 2021 18:44:39 GMT -5
Post by Brian on Apr 7, 2021 18:44:39 GMT -5
Where you able to get a decent enough pour of the HS-3 to create a good mold or did it cure so fast as to not be pourable enough to make a mold? How long would you guesstamate that it took to go from a liquid (same consistency as it is in the container) to full cure?
I've messed around with HS-2/HS-3 and got the cure times down around 6 to 8 hr's but nothing like this.....wondering if the catalyst its self is at fault here....
I have never had to thin the RTV silicone...everything that I can think of to thin it would either ruin it or change the size of the mold.... |
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HS3
Apr 8, 2021 9:40:06 GMT -5
Post by Willam Gross on Apr 8, 2021 9:40:06 GMT -5
that's just the thing in the container its pretty thick a lot thicker than before I tried to use less catalyst only to wait about 16 hrs to cure and the RTV is sticky/tacky and takes another 24 hrs to cure as for a time line from liquid to curing less than 30 min and its I measure more catalyst it dose not change the consistence just cures way faster. I don't know before I can make a batch and slow pour and roll around the part to make sure it gets in the under cuts but know it just starts setting up really fast and ive even noticed the resin RC-3 gets a lot more bubbles in it than before and if i try to vac out the bubbles its curing and the resin gets wasted dont know maybe time to try other products.
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HS3
Apr 8, 2021 22:12:14 GMT -5
Post by Brian on Apr 8, 2021 22:12:14 GMT -5
Please give Carol at Alumilite a call at 1 800 447 9344 (M-F reg bus. hrs.) reference this issue.....let her know that I have been corresponding with you on this.
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HS3
Apr 12, 2021 6:34:40 GMT -5
Post by notoes on Apr 12, 2021 6:34:40 GMT -5
I agree, Carol definitely needs to know about this - they get some of the ingredients from Texas and there was a big delay recently in getting some things due to a weather related delay so something may be off/have changed in the formula and they need to know. I've also noticed that lately the molds made in HS-3 and Plat 25 have a slight "greasy" feeling after demolding that I usually do a quick swipe with a paper towel to clean off (it's just a bit of the silicone oil leaking out a little so nothing that is that bad or hard to just wipe off).
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HS3
Apr 12, 2021 12:08:10 GMT -5
Post by notoes on Apr 12, 2021 12:08:10 GMT -5
William,
I tried to recreate your problem and I found I had the same thing happen to me so I called in and they are narrowing it down to what the problem is (it seems it might be the catalyst) but DEFINITELY give them a call and get a new container of HS-3. I use HS-3 (and Plat 25) all the time so I know exactly how it's supposed to act in different situations and there is something not right in that batch.
You also might notice that the mold is more white than the normal light pink - this indicates there is something off in the catalyst as the tint in it should clearly be pink in the bottle to make a light pink mold as the tint is something that helps the person mixing it to visually tell that it is completely mixed properly.
And to everyone on the forum - always let them know when something isn't right as they don't know (and can't fix it) unless someone
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HS3
Jul 5, 2021 16:33:53 GMT -5
Post by Aaron Gonzalez on Jul 5, 2021 16:33:53 GMT -5
Wow. I'm so glad I came to this forum. I have been having the same problems with super fast curing. I even ruined a couple molds. The paperwork says 45 min cure time but after 12 minutes it starts to get real thick. it created a cavity in the molds. and yes, it is completely white and no pink color. I thought Alumilite just changed their formula. I will also call Carol tomorrow.
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HS3
Jul 9, 2021 6:31:20 GMT -5
Post by notoes on Jul 9, 2021 6:31:20 GMT -5
I completely understand how you feel, we do try our best to help when we can and I've messed up a couple mold boxes due to that batch of HS-3 but the next one worked just fine though it still had a bit of a quicker set up time. I'd already figured out how to work around it so it wasn't a problem for me, I even made it work for me when I had a couple molds I needed to cure quicker so I could demold quicke. And yes the formula has changed a bit as the catalyst doesn't have the pink tint in it anymore.
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