These files are used to create a rubber gasket for the many 3D printed respirators out there. A gasket is needed to form a better seal for these sorts of homemade respirators.

The first image shows the gasket installed on one of the many designs you can download and print. Please note the gasket should work with just about all the different style masks currently available.

I've uploaded a full version of a single mold with insert, a full version of a 5 gasket gang mold with inserts and a single half mold and half gang mold to make these easier to print on smaller machines. Any file that has an X2 at the end you need to print twice then glue the two halves together.

Once the molds are printed you can glue them together using Super Glue. The connector files are optional and are just used to help align the parts when gluing.

To make a gasket I recommend using EcoFlex 0035 from Smooth-On for the castings. It is a skin safe platinum cure silicone that has a pot life of 2.5 minutes and a 10 minute cure time. It is extremely fast and will allow you to make many gaskets quickly.

After you cast your gasket(s) you need to attach it to your mask. It can be slid onto the edge of the mask and has enough depth that it should stay in place but I highly recommend gluing it to your mask using Sil-Poxy which is a skin safe silicone adhesive also available from Smooth-On. Be sure to take extra care gluing the 2 ends of the gasket together. You need to be sure the gasket is secure and has no leaks.

You can use Sil-poxy to make the many head bands for face masks skin safe as well. Just spread a thin layer of it onto the band where it will touch your forehead and allow it to dry. Where gloves when applying it. It's only skin safe once it is fully dry. You should not touch it in the liquid form.

Please share this file with anyone and everyone that may need it. Be smart and be safe!

EcoFlex 0035:
https://www.smooth-on.com/products/ecoflex-00-35/

Sil-Poxy:
https://www.smooth-on.com/product-line/sil-poxy/

Link to Mask shown in first photo:
https://www.thingiverse.com/thing:4256688