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iconian | Staff 43.7K Views
Feb 21, 2026 3:37 PM

2-Pack 2" x 39" GroTheory Under Door Draft Stoppers (White)

$6.00

$14

57% off
Amazon
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Deal Details
This popular Frontpage deal is available again with a new promo code.

Grotheory US via Amazon has 2-Pack 2" x 39" GroTheory Under Door Draft Stoppers (White) for $8.52 - $2.53 when you apply promo code XLIMHJQX at checkout = $5.99. Shipping is free w/ Prime or on $35+ orders.

Thanks to Deal Editor iconian for sharing this deal.

Note: Promo codes are typically for one-time use and don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.

Editor's Notes

Written by persian_mafia | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:
Expired promo code:
  • ESHYDEY5

Original Post

Written by iconian | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
This popular Frontpage deal is available again with a new promo code.

Grotheory US via Amazon has 2-Pack 2" x 39" GroTheory Under Door Draft Stoppers (White) for $8.52 - $2.53 when you apply promo code XLIMHJQX at checkout = $5.99. Shipping is free w/ Prime or on $35+ orders.

Thanks to Deal Editor iconian for sharing this deal.

Note: Promo codes are typically for one-time use and don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.

Editor's Notes

Written by persian_mafia | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:
Expired promo code:
  • ESHYDEY5

Original Post

Written by iconian | Staff

Community Voting

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Top Comments

Community Reviews

This under door draft stopper is a simple interior door seal that blocks drafts and cuts noise, with several installs described as effective on basement, laundry room, and other indoor doors. Installation is straightforward, since it can be measured, cut with scissors, and stuck on with the included 3M tape, and the coupon appears to work on multiple sets. The main caveat is adhesion, which is described as weak on some doors and may need extra tape or a screwed in strip. It also arrives rolled up and is not a good fit for exterior doors.

Common Questions (5)

  • Yes, it is suggested for interior basement doors, doors to attached garages, stairwell doors, storage rooms, and other unheated spaces. It is meant to block drafts while still allowing some air circulation and ventilation.

  • It works well on interior doors and is easy to install with the included 3M tape, but it is not a good fit for exterior doors. The adhesive and hold are reported to be too weak for exterior use, while it stays on and seals well indoors.

  • Yes. The coupon scales with quantity, so ordering 2 or more can apply the discount to multiple sets, and the order may also qualify for no-rush shipping credit when available.

  • It can noticeably cut sound transmission, especially through small bottom gaps under doors. One installation on a laundry room door was described as a significant reduction in noise, and even a half-inch gap can let through a surprising amount of sound.

  • The adhesive is often reported as weak and may need reinforcement. Some users add extra tape or use a screwed-in metal strip to keep it in place, especially on doors that get more wear.

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51 Comments

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Mar 15, 2026 8:40 PM
100 Comments
Joined Jun 2025
FeistyMallard7178Mar 15, 2026 8:40 PM
100 Comments
I have these and installed them myself on interior door - looks great!
Mar 16, 2026 10:35 AM
97 Comments
Joined Dec 2019
XnavyguyMar 16, 2026 10:35 AM
97 Comments
In for a set
Mar 16, 2026 2:01 PM
29 Comments
Joined Feb 2018
Kierankelly619Mar 16, 2026 2:01 PM
29 Comments
Ill give it a try
Mar 20, 2026 8:45 AM
374 Comments
Joined Aug 2011
tamonezMar 20, 2026 8:45 AM
374 Comments
Quote from grantland View quoted comment :
They come rolled up so they don't really install looking straight
Just do what you do with valve cover gaskets. Lay them out in the sun. woot
Mar 20, 2026 1:07 PM
1.6K Comments
Joined Sep 2012
hindolamMar 20, 2026 1:07 PM
1.6K Comments
Quote from DealsWithIt20 View quoted comment :
Aren't door gaps important for HVAC systems for homes that have central air? Air needs to be able to move in and out of rooms or it can lead to uneven cooling/heating and wear on the system/increased energy bills.
That will be correct. The gaps have a purpose. Air needs to be able to circulate - especially If you do not have a return register in the room. They provide ventilation as well to reduce moisture buildup.
Mar 26, 2026 10:20 PM
6 Comments
Joined Oct 2019
JaykuboMar 26, 2026 10:20 PM
6 Comments
Code does not work for me

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