DIY Gas Mask




Introduction: DIY Gas Mask

About: I'm a full stack web developer focusing on security and privacy.

With Occupy protests around the country, things are heating up. With disbursement of tear gas an pepper spray by police, how are regular people able to keep safe?

Normally, one would by a gas mask, but given cost, bulkiness and being a target when wearing one, this might not be the best option. Based on a pamphlet i saw floating around the internet, you can make your own primitive gas mask out of some stuff you have lying around the house.

WARNING: Tear gas is no joke, it burns, hurts and makes you cry for your mommy. Those with respiratory issues should be aware that tear gas can complicate things, leading to injury or even death. Do not use this gas mask tutorial for life threatening situations.

Step 1: Idea

The idea came from this pamphlet that has no author. I figured to make an instructable about it to not only tell others about it but to get constructive feedback from the instructables community. I do not see this idea as a finished product, please give me your input!

Step 2: Supplies

For this project you will need the following:
- a 2 liter soda bottle
- a n95 rated face mask that is good for particulates. Tear gas is a dust, not a gas so this will be perfect
- Duct tape (i used gorilla tape
- Stapler

Step 3: Mark and Cut

The first step is to mark your bottle and cut it. I used a sharpie to mark the bottom off and the dip the bottle takes to fit to your face. I then took a regular knife and cut the shape out.

Step 4: Tape the Edge

For this to work, you have to create a seal on your face with the bottle. i created this seal with a bit of gorilla tape around the edges. Wrap the tape around the edges until you feel like you'll get a good seal. Check the seal by putting the mask on your face, plugging the spout and breathing in. If you have a seal, the bottle should concave a bit to your face.

Step 5: Disassemble the Facemask and Put Into Bottle

Pull off both of the yellow straps from the facemask (SAVE THEM!) to have a strapless mask. From here you can just stuff it into the bottle.

Step 6: Make a Hands-free Mask

You could stop here if you just wanted something you could hold to your face, but if you want hands-free operation, you can reuse the yellow straps and staple them to the mask.

Step 7: And Your Mask Is Done!

Now you can run around in the tear gas a little easier, just slide the mask over your face, make sure the straps are tight and you're ready to go.

If you have improvements or your own builds, please post them in the comments below. Stay safe!

For more info about occupy protests going on around you, check out Occupy Together

For info about hackers are getting involved in the occupy movement go to Occupy Hack



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    197 Discussions

    I'm really sorry, but can everyone PLEASE STAY ON TOPIC... I'm really tired of reading about how "Occupy is this..." and "Civil Disobedience is that..." and all the, quite honestly off-topic political discussion concerning the potential use of this device.
    Does each side have arguments? Yes. Valid? I don't care... not important for an instructable. 

    Talk about the function of the device and how to make it better... not WHY it should or shouldn't be relevant.

    I think this should be a last-ditch piece of equipment, something that will let you leave a gassed area safely and maybe help those around you that aren't as well prepared.  Honestly, N95 masks are rated for 15-minutes of droplet protection before things start to seep through; and that's with a proper fitting around the face.  "Stuffing" it into the neck of the bottle is less than ideal fitting.

    My point is that worst case scenario, this might give people a false sense or security and embolden them to do riskier things than they're prepared for.

    Maybe putting nylon tights over a persons head (the foot part) might help to tighten the seal of the mask to the face, and might add the tiniest bit of protection.

    Would a World War I-era German M1916 gas mask protect against Tear Gas? I do happen to have one lying on my desk that was given to me by one of my grandparents.

    Wouldn't these be good for general protection when woodworking? I tend to get a lot of dust in my nose and eyes, even with glasses and some cheap masks.

    good ible and practical. Some charcoal may be useful on the way of inhaling as filter i think

    home depot probably sells a pack of five for 4 dollars or something like that. Harbour Freight sells them for even cheaper!

    will this work ?

    putting a few foam pieces (like the kind on your bike helmet) would help make it more airtight and more comfortable instead of just gorrila tape. Also,an additional strap around the neck from a second particle mask (they usually come in packs of 3 or 5 anyway) would help if you end up running (in a protest situation where there is tear gas, you'll probably end up running). Adding a layer of activated charcoal and then another mask on top of that would be even better. BTW lemon juice and toothpaste neutralize the effects of teargas, so smear some of that in there, too!!!!!! Great build!!!!!!!!!

    Any alternatives to the cloth strips or foam?

    nice instructable. to all those that are saying these are pointless, even if it doesnt give 100% coverage, id rather take 50% coverage then take a full hit of whatever gas is being dispersed. yes you can buy cheap masks online and whatnot, but if something is going on in the city you cant ask teh authorities to wait 3 days so you can order one.

    Im not here for politics just the cool concept. keep up the good work :D

    If it's just CS gas you're protecting against, I think just using the store-bought mask and some swimming goggles might be more effective. Without a proper, tight seal on this mask, you still run the risk of gas irritating your eyes.

    If it's anything worse than tear gas you're worried about (nerve gas, for instance), then you'd need full body protection (literally head to toe), or it wouldn't matter anyways.

    The idea is neat though.

    Clever individuals, assisting Anarchy since Law Enforcement became a thing.

    Oh yeah - one last thing. Your DIY mask will not filter CS/CN gas. N95 masks are particulate masks (i.e. things floating around in the air > .03 microns big).

    An Israeli civil defense gas mask cost around $20 - usually comes with an expired filter (that are still fine for CS gas) and the whole thing - mask & filter - can be placed in a 1 gallon zip lock baggy.

    1 reply

    and for an additional $5 you can buy an adapter to fit standard 3m filters - which are a fraction of the cost of the 40mm type filters these masks normally use.

    3m 701 - filter adapter from 40mm to bayonet

    3m 60926 bayonet stile NBC filter (if you're going to buy a filter might as well by broad use)


    cut out the center of the bottle cap. cut out a piece of carbon filter slightly larger than the cap. place carbon filter circle inside cap. screw filter cap on the bottle.