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The PRO-SEAL® can be retrospectively fitted into any Respro® mask no matter when purchased and provides an even better seal to your mask.

  • Accommodates a wide range of face shapes
  • Reduces inward leakage
  • Reduces inhalation resistance
  • Makes the mask easier to breathe through
  • Makes the mask more comfortable

This is Respro’s new polymer seal, the PRO-SEAL®. It provides an even better seal to your Respro® mask.

The PRO-SEAL® can be retroactively fitted into any Respro® mask no matter when you bought it, last week or 23 years ago. It provides improved sealing which reduces inward leakage. Inward leakage (IL) is unfiltered air that gets in around the sides of a mask and filter because a mask fits poorly or just doesn’t make a proper seal (think ear loop masks).

The PRO-SEAL® helps keep the filter away from the face which in turn increases the over all surface area of filter material to draw air through which not only reduces inhalation resistance, but makes it easier to breathe through and a more comfortable experience. The PRO-SEAL® is more compliant and accommodates a wide range of face shapes.

The PRO-SEAL® is not a mask, it requires a filter, valves and a mask shell, so don’t forget to get these essential parts from the accessory page here.


Black, White


M, L, XL

14 reviews for Pro-Seal®

  1. thomas

    The Pro-Seal is really good and protects even better from the pollution since there is less chance for the air to pass around the sides of the mask.

  2. Nitzan

    I live in a rural area and work in a big city, so I’m unused to exhaust smells. The mask (with the Pro-seal fitted) has exceeded my expectations in transforming my commute experience. The railway here runs highly polluting 2-stroke diesels and the air quality in the major stations is horrendous. Also, more often than not, the cars reek of diesel fumes and stench (as the A/C system sometimes suck external air into the train cars or a window is poorly sealed / left open). Another pleasant aspect of wearing the mask in the train is that it filters out aggressive smells of perfumes, cigarettes and food. I find myself wearing the mask (ultralight) for the entire duration of my commute (~2 hours), including walking in the street in a hot middle eastern climate. I have also recommended it to friend of mine who does the same commute, and he bought one as well, so good job with your product

    RESPRO’NSE: Thanks so much for taking the time to let us know about your environment and how your Respro® Mask works for you. Much appreciated

  3. Alan Plummer

    Harrison, Pure genius! Inverting the Pro Seal at the top did the trick, and actually makes for a more comfortable fit. Don’t know why I didn’t think of it. Thanks for your thoughtful, detailed replies to my questions . Best customer Service on the Planet. Alan

  4. tukibird

    Bought my Ultralight (black)in 2015 and after using it for 2 years. i just upgraded it with the pro-seal now the filter don’t stick to the face when working out – a great add on to the the mask

  5. Richard

    Really happy with the Proseal addition to my Ultralight and Allergy masks. Really helps seal the mask to my face under all conditions, especially with the fact that I have to shave often and stubble can interfere with the seal without the Proseal. It also helps the mask fit me better as the XL mask is just a bit big. And I could not be happier with the level of customer service. They have responded to questions quickly despite the time difference to Vancouver Canada. They have been very helpful and the masks are helping me immensely when dealing with dust mite and grass allergies; work, working out in the gym, running, even running races with a mask on. And with fire season coming and constant smoke in the air expected, I am totally ready!

    Respro’nse: “Thanks for your review Richard. Very happy to hear the Proseal is working well for you. Great to get the feedback”

  6. Killhippie

    I bought one of these for my Ultralight, both XL, the nose peak sticks up about 1/2 inch above the mask, it stretches the masks fabric so you can see the holes near the powa elite valves clearly and basically ruins the mask and looks awful and does not feel comfortable, yet it fits my Techno+ perfectly. This feels like its not designed for the ultralight at all sadly.

  7. gandroid

    in my opinion, one of the best add-ons, especially for the CINQRO and my face type (round and fat as a potato), it does a hell of a job, with keeping away the Filter from my Skin, so the Filter doesn’t get that wet, when wearing the Mask for a longer time. In double the Seal Pro gives a much, much better sealing around the edge compared to the Filter itself fixed to the Skin (Especially right under the Eyes) RESPRO’NSE: Thank you for taking the time to write your review. We are very happy to hear the Pro-seal® is working well for you.

  8. Karen

    Unfortunately, I’m allergic to whatever material it is made off. (I’m allergic to polyisoprene, or ‘synthetic latex’, as well as DEHP, thats my best guess as to what I’m reacting to). RESPRO’NSE: Please send an email to our CS team to see if they can help you with this.

  9. dennho

    The proseal should have come with the CE Conversion kit! Anyways, I ordered a standalone large proseal for my allergy mask and the proseal takes about a day to “break in”. Once broken in, it really makes it easier to breathe through the more restrictive filters! I have never worn a real respirator device before, but I assume this is the missing link. It seals and contours the face very well and only allows you to breathe through the filter / valves only!


    The product is a great idea and works however it is starting to tear after a little less than a year. I hope since this is a new product respro remedies this and creates a product that lasts a lot longer.

  11. firesaint1

    An essential upgrade. Though I walk through the valley of the shadow of respiratory hazards, I fear no particles, for my Respro and my Pro-Seal are with me. RESPRO’NSE: Amen to that 😉 Thanks for your review. Much appreciated

  12. mattblack000

    I had an issue with latest version of pro-seal not fitting my face properly. I informed customer services as assumed it was a quality control issue but in fact it was due to changes in design. However, customer services is top notch and have sourced an older version, free of charge. Probably one of the best company customer services teams I have dealt with who actually put the customer and not profits first. Will not hesitate to recommend.

  13. daniel

    The seal itself is a great add-on. It is comfortable wearing it after a break in period and does what it should do. Wouldn’t want to miss it in China’s bad air. Unfortunately, it starts cracking after about a year. I should give an extra star since Respro replaces it after seeing some pictures for free, just needed to pay shipping. Considering this was after more than a year the customer service was a nice surprise. I would recommend Respro to change to medial silicone as this should extend the durability.

  14. Michaeldymtro

    It is an upgrade for your old mask. Glasses fog a little less and filter stays a little farther from your mouth which increases the surface area of the filter which makes breathing a little easier..

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