2 Part Mold leaks

[Eddie]

Hi I have now built my 2 part mold which is quite large needing to be clamped betwean 2 pieces of wood.

I have tested it pouring warter with limited success and it leaks a little, Any suggestions how I might improve this. Or do I need to clamp tighter or less tight.

New to this game. I wondered sould I make an RTV slip cover to put around the bottom of the 2 halfs.

The mold is so far 5 litres of RTV.

Cheers Eddie

[Fleafa]

Water has extremely low viscosity compared to resin, so that's not entirely surprising. You're unlikely to have a real leak from resin, but you will get flash.
Make sure the application of pressure is as even as possible all the way around the mould to minimise distortion and flash.
Make absolutely sure the water has all evaporated before you pour any resin.

[mangozac]

Fleafa has it spot on

[Eddie]

And you were both right no leaks at all, plus the release agent helps as it provides a seal.

Cheers for the support. Eddie