Silicone Seal Advice Needed...

Thanks guys, it’s for 3 initial prototypes, to verify I can seal the unit to IP67 rating…

See image attached, I’m trying to seal the outline below and a tube that will run into the product through the gap visible. An O-seal will work here, just need to think how that interfaces with the two parts and any gaps that might appear. 1m of water will create a fair emount of pressure so everything needs to be well considered…

Mike