Tacky RTV Silicone

[Redfrick]

How do I fix tacky silicone? I am making a brush on mold of plaster sculpture I made. The first 2 layers I had no problems they cured just fine. The third layer was a bit tacky in a few spots but I didn't worry too much about it as I was doing one more layer. 24 hours after the fourth layer and it's pretty tacky. Is there anyway to fix this and any ideas what might cause this so I can avoid it in the future? This is my first attempt at making a mold.

Thank you for any assistance.

 

[Wes R]

I usually just let it go for a bit more time but I've never used it to brush on. If you're in a hot area maybe the humidity is slowing it or the activator is taking longer.

 

[MonsieurTox]

You can put it in water to accelerate the process, are you sure you mixed the right ratio RTV/catalyst ?
Is your RTV new ? If it' sa bit old or have been on a retailer shelf for a while it can be a good idea to mix it thoroughly as silice can go down in the bucket. Be sure to shake te catalyst bottle too and mix both for enough time.