Polycraft GP-3481F RTV Silicone Mould Making Rubber 2.2Kg Kit, Professional Grade Mould Making Material for Crafts, Resin Casting, Catalyst for Easy Mixing, Ideal for DIY Projects

I’ve used other silicone rubber mould kits, this surpasses all previous kits by a long way. Easy to mix, once set the mould holds incredible detail, is very robust and excellent release capabilities. I bought this for producing detailed dioramas and have not been disappointed. It’s an incredible product. Remember to order sufficient for your use and mix by hand to prevent air bubbles as per instructions state. Simple easy to mix.

I have used a fair amount of this rubber over the years and its a great product. Polycraft are my go to for anything when it comes to mould making and casting. I recommend that you use a vacuum chamber to remove air bubbles when using it to ensure you get the best possible results. I have used it both with and with out a vacuum and the results are like night and day. I would never go back after seeing how much better my moulds came out when using a vacuum.

My first attempt. Was really pleased how it came out with so much detail. The only thing that bugged me, was trying to measure the gardener,as it didn't pour out of the bottle very well, so got into a bit of a mess,and obviously wasted some. But apart from that, I'm going to be ordering more.

Ive tried other silicones only because they were slightly cheaper but thus far I can find one better than this.... stays workable, allows bubble to surface well and still cures fast. Will be buying for the forseable future.

Still really new at making my own moulds and I need some better housings to reduce the amount of liquid needed. However couldn’t be happier, my 3rd attempt at making a mould and this one turned out great even though the contact tape didn’t stick the original down. Doh. However made this shiny lovely resin cross as a result of my handmade mould! Love it ;) I used a release spray and popped out great, didn’t with my 2nd item and that’s still stuck together 😬

Very good product, but bit expensive.

If you can bear the smell of polyester resin (use a good vapour filter mask),this is a good resin. I filled it with bronze powder as a gel coat and backed it with glass tissue, then bulk filled it with car body filler and finally used slate filler with it on a slow cure. It performs well without any styrene residue stickiness between the rubber mould and the gel coat interface. Good value and recommended.

Not cheap but is easy to use