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Took cover plate off light switch and this is under it. Feels like sawdust, but more "springy". : r/whatisthisthing
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How to Close Gaps and Insulate Outlets and Light Switches: Energy Saving On a Budget - Minneapolis Homestead
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Kasa Smart 3 Way Switch HS210 KIT, Needs Neutral Wire, 2.4GHz Wi-Fi Light Switch works with Alexa and Google Home, UL Certified, No Hub Required, White,2 Count (Pack of 1) - Amazon.com
![Duck Brand Socket Sealers Variety Pack, 16 Outlet Sealers and 6 Switch Plates, 2 Decorative Covers, White, 283333 - Outlet Insulation - Amazon.com Duck Brand Socket Sealers Variety Pack, 16 Outlet Sealers and 6 Switch Plates, 2 Decorative Covers, White, 283333 - Outlet Insulation - Amazon.com](https://m.media-amazon.com/images/I/917iDDdN9pL.jpg)
Duck Brand Socket Sealers Variety Pack, 16 Outlet Sealers and 6 Switch Plates, 2 Decorative Covers, White, 283333 - Outlet Insulation - Amazon.com
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