Post by Brian on May 27, 2019 13:39:12 GMT -5
No, this is not some baseball analogy but rather what I purposely did recently in my on going stress testing/ taking it to the limit with Alumilite's RTV Silicone Rubber. This time it involves new HS-2 RTV Silicone Rubber and some very old HS-2 catalyst....I have no reason to doubt that the same results would hold true for HS-1 and HS-3.
I recently visited Bob Hayes at his home....he had some Alumilite RC-3 resin that he had been using prior to his strokes and thought it might be a good idea to let me have what was left rather than let it go bad since he won't be able to pour any time soon. In with the RC-3 resin was a .46 LB. bottle of High Strength 2 Catalyst that was obviously old...the bottle itself has a Pink stain where the catalyst had sat and the catalyst was either chunky or stuck to the bottom of the bottle ...this was the perfect set up for my next experiment.
I had a 2 part HS-2 mold that I wanted to do , so I decided that the 2nd part would be done using the very old HS-2 catalyst....just for shucks and grins and to see what would happen. I did shake the catalyst for about 5 to 10 minutes due to its age and mixed for 2 minutes with the HS-2 RTV Silicone Rubber as I would have done normally.
After a 24 to 36 hour period the HS-2 RTV Silicone Rubber w/ old catalyst was the same consistency as it was prior to being mixed...it did have a Pinkish color to it from the Catalyst.
I wanted to reuse the HS-2 , so I poured the HS-2 RTV Silicone Rubber w/ old catalyst from the mold into an empty ,air tight container and cleaned up the mold of any left over RTV rubber and re applied Petroleum jelly as a mold release.
The HS-2 RTV Silicone Rubber w/ old catalyst weighed in at 65g. ....so I added 7g. of known good HS-2 catalyst and mixed for 2 minutes and re poured. 10 to 12 hours later the 2nd pour is firm....I do need to mix up about 25 to 30g more to finish the second part of the mold.