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Available in a pack of 8 washers with Silencer logo sticker.

Silencer Sanwa/Seimitsu 30mm Foam Washers (Pack of 8)

$1.95 (USD)
0.06 Ounces
Ships within 2-3 business days
Calculated at checkout
Max Qty
4 unit(s)

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Other Details
  • Product Description

    Note Regarding Hori Low Profile Matte Buttons. Additional Compatibility Reports.

    The Silencer pads compatible with the recent Hori Hayabusa low-profile matte version, but will require cutting off the side tabs.  This is similar to Seimitsu PS-15 low profile pushbuttons. Additionally customers have reported compatibility with Samducksa 201 Futaba and 202 MX pushbuttons.

    In November 2012, one of the highest voted ideas in our product suggestion forum was creating silent foam washers.  This would provide an alternative to Sanwa's ground-breaking, but limited silent button lineup of OBSFS pushbuttons.  Imagine having the ability to silence Sanwa OBSN screwbuttons, or the more recent translucent OBSC pushbuttons.  

    Now imagine the same for Seimitsu.  

    Available now is Silencer - a 1mm foam washer shaped to fit in both Sanwa and Seimitsu 30mm pushbuttons.  Suggested by you, and tested over several months for performance and durability.

    Unique Shape and material

    Silencer is a 1mm foam washer that conforms to the internal housing of Sanwa and Seimitsu's 30mm pushbutton lineup.  It also utilizes small "tabs" at each end of the washer, which additionally absorb the sharp sound created as the pushbutton plunger's tab meets the rim.  Sanwa and Seimitsu - for copyright purposes - deliberately orient their plunger tabs differently from one another.  Silencer's tabs can be oriented horizontally or vertically for Sanwa or Seimitsu's unique housing.  For Sanwa OBSF, OBSN, OBSC and Seimitsu PS-15 pushbuttons, Silencer's tabs can be snipped off without affecting its ability to reduce noise.   

    Silencer's foam material was chosen for the closest match to Sanwa's original foam washers.  For increased durability, an incredibly thin and flexible plastic film was placed on one side.


    installing the Silencer foam pads into a Sanwa or Seimitsu pushbutton is straightforward.  Place the washer - plastic film side down - into the button housing.  Align the small tabs so that they stick out of the holes on each side of the housing.  For Seimitsu PS-15 low profile pushbuttons, snip the tabs off with scissors and place into the housing.

    Months of Play-testing, Sound and Endurance Tests

    The objective of Silencer is to provide an alternative washer for Sanwa and Seimitsu pushbuttons that effectively reduces noise, but also matches the actuation ability and natural feel in Sanwa's OBSFS offering.  To do this, we sent prototypes of the washer - originally in clear silicone and later foam - to a group of dedicated testers.  Over several months, we learned that foam was more effective in matching Sanwa's original washer and absorbing shock while matching the actuation of Sanwa's own product.  We also learned that "springiness" and "mushiness" was an undesired factor in other washers - first with our silicone prototypes, and later with competing solutions. 

    Further, we performed blind tests with individuals and groups, who assumed that Sanwa's OBSFS pushbuttons were installed. The washers were taken to tournaments in Philadelphia and utilized in joysticks swapped amongst players during the events.  Those using Silencers indirectly reported no differences in feel to our testers; they didn't feel "springy" or"mushy", and were able to tap away normals, links and combos as they always did. 

    Finally, we performed tests in Seimitsu's PS-14 K and KN series of pushbuttons.  The KN was most compatible due to its internal housing; Silencers proved effective for both in muffling sound while not restricting their unique feel.  Though we couldn't perform blind tests, players that did use them were quite pleased that pads were designed for Seimitsu.

  • Product Reviews


    Write A Review

    1. Even better than I expected - 1 year + of use

      I chose to wait to write my review.
      I have used these silence pads in both my Sanwa and Hayabusa matte buttons for over a year now. One both PS4 and in classic HRAP Sanwa’s on PS1 and PS2 sticks. They work great. Reducing the hard-tapping noise by at least 40%. I don’t notice any issues engaging the switches.

      However, the plunger will now ‘hit’ the foam pad rather than the true plastic bottom. At first, it feels like you must press the buttons harder than usual.

      That is a false assumption.
      The switch engages before the plunger normally bottoms-out.
      In fact, when combined with the short-throw of the newer Hayabusa matte buttons; they seem razor sharp and fast! BOTH of their bottom-out is reduced by the pads; and the travel is short by its design on the Hayabusa

      Here is my example, for the purpose of my illustration:

      In a stock Sanwa imagine the button travel from top to bottom as : 2mm down to 1mm down to 0mm= (engage) down to -1mm=(bottom-out) then return.
      These pads remove the -1mm area.

      Now, combined with the shorter Hayabusa buttons AND these pads: 1mm down to 0mm= (engage AND bottom-out) then return.

      I highly recommend these for both Sanwa and Hayabusa matte owners.
      on Jun 11th 2019

    2. Nice Quiet Sound#2

      like them,but they should have something sticky bottom of the washers. on May 28th 2019

    3. barely does anything

      all it did for me was make the sound less sharp but more blunt while being just as loud. doesnt actually silence not even close but it MIGHT make it less annoying to you. on May 9th 2019

    4. Silent inputs for the night warrior.

      The silencer washers from Focus Attack provide a great way to reduce noise output without reducing input feel.

      While they do decrease the "throw" of the button press when hitting the actuator, for some reason that still doesn't seek to detract from the respsonive of the button itself.

      as matter of fact, I found that the shorter button press felt more natural when performing actions with tight execution.(Kazuya's EWGF for example) This might just be a personal preference, but it just goes to show how well these washers preserve the input feel.

      I'd definitely recommend these as a alternative to buying Hori or Sanwa silenced buttons and i might just buy another set for my tournament stick too!
      on Jan 22nd 2019

    5. Great!

      They work on Crown buttons too! on Nov 28th 2018

    6. Exactly what I was looking for.

      Cheap, easy install and great results.
      Makes the annoying clicky-clicky sound go away + I feel like the buttons become ever so slightly more sensitive which is a plus in my book!
      on Sep 4th 2018

    7. Worked perfect on a Mayflash F500

      These worked great with the default Mayflash F500 buttons. I bought the washers to last until my Sanwa silenced pushbuttons arrived, but these worked well enough I probably didn't need the upgrade. on Aug 29th 2018

    8. Awesome product

      My roommate doesn't yell at me anymore. on Aug 1st 2018

    9. Works Great in Hori Buttons

      Works as intended on Jun 26th 2018

    10. Works great

      Way quieter. Feels a little different at first but you get used to it. on Jun 13th 2018

  • Product Videos

    • Silencer Foam Washer Install Guide on Sanwa 30mm Pushbuttons
      Cheap and quick way to silence your button presses! This insta...
    • How to install Silencer Foam Washers into Sanwa 30mm Buttons
      Full take apart vid of 30mm Sanwa OBSC (aka translucent OBSF) ...

    Silencer Foam Washer Install Guide on Sanwa 30mm Pushbuttons

    Cheap and quick way to silence your button presses! This install was done on my Mad Catz TE2 FightStick on Sanwa 30mm push buttons. Drop a like, comment and subscribe! Stay connected!
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