Vents for Silicone Molds | How to & Available Products

Tech Tip with JOHN!

Have you purchased our Acrylic Vents & Sprues for Mold Making?
We've added new, smaller 1/8" vents and vent straws for tighter areas and thinner wall sections. Watch our intro to mold making videos to learn the strategies on placing vents around your part and ensure void free cast parts.

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[makingcookingfixing]

What material are those rods you use ? Also, you mentioned the diameter of the vent port, but not of the fill port and it’s tip. I am not in the USA and am looking for a suitable material to make these vents, I tried weedwacker plastic but the CA glue doesn’t stick it.

[muhamadridzuan]

What glue do you use.. i use super glue and it left with leftover glue and the original part

[somedandy]

I'm completely new to this, so I've got a question: How does the item de-mold perfectly, without having vented material stuck to it? The plastic that flows up the vents is still part of the cast copy, isn't it?

[tv]

Hi I usually make my vents in stainless steel that fit into drinking straws so they are not too heavy, had a problem with my last mold and the vent moved out of position. I have filled in the hole in the mold left by the vent using the mold rubber (mold star 15). I now need to put a hole through the mold to replace the out of position filled in vent, what is the best way to do it
Regards Stuart

[muhamadridzuan]

Hi..do you use pressure tank for this casting?

[flat__stan]

is there any drawback from putting too many vents? I want to be very sure there's no trapped air but am worried too man vents will affect the pour