Mold Putties

[Rafael]

What I said. Who here has experience with mold putties?

Rafa

[macfrank]

What I said. Who here has experience with mold putties?

Like this mold putty?

I haven't used this brand, but I've used other two part Polyvinyl Siloxane putties. They're the types used by dentists to make impressions (not alginate). They work great - easy (and forgiving) 1:1 mix and they really make good copies of a master, and some of the thicker ones can be used without a mold box - just slathered on to the master. Depending on the type, the mold can be very soft (great for fine details) or hard, like an eraser.

The drawbacks are:

Price. 180ml can easily cost $25 or so.
Cure time: 5 minutes. Great for small molds, not so great for big projects. The Amazing Putty that I mentioned above has a 30 minute cure time.

BTW, MicroMark sells a 2 part Polyvinyl Siloxane that cures to a pretty hard consistency. The main drawback is that every batch I've gotten from them is at or past the expiration date. The silicone oil in the components starts to separate, rendering the putty pretty much useless.

Frank

[davidlgreen]

ive used the amazing brand and it works well got it at hobby lobby.
also hit their website and bought it when they had a 40% off coupon

[TER-OR]

I've used Knead-a-Mold with success. Be careful or you can deform the mold while using it. I found a small layer followed by a thicker layer for strength did well.

[Rafael]

I've heard good things about knead-a-mold, but couldn't find it last month when I traveledto the States. Found Amazing mold putty and bought a sample. Future trips will be more oriented to modeling, though.

Rafa

[macfrank]

Found Amazing mold putty and bought a sample.
Rafa

Rafa, I'd love to see what you do with it!

[davidlgreen]

poyo putty from smooth-on
quick-sil from castaldo rtfm on quick sil