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THERMWELL Frost King AC43H Air Conditioner Weatherseal Tape,…

THERMWELL Frost King AC43H Air Conditioner Weatherseal Tape,…

Original price was: $5.99.Current price is: $3.94.

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Price: $5.99 - $3.94
(as of Nov 25, 2025 02:08:34 UTC – Details)

Sealing the Deal: THERMWELL Frost King AC43H Air Conditioner Weatherseal Tape Review

As the summer months approach, many of us rely on our air conditioners to keep our homes cool and comfortable. However, a common issue that can arise is the loss of cool air due to gaps and cracks around the air conditioner unit. This not only wastes energy but also increases your utility bills. That’s where the THERMWELL Frost King AC43H Air Conditioner Weatherseal Tape comes in – a simple yet effective solution to seal those gaps and keep the cool air in.

What is the THERMWELL Frost King AC43H?

The THERMWELL Frost King AC43H is a type of weatherseal tape specifically designed for air conditioners. It is a self-adhesive, foam tape that is easy to apply and provides a tight seal around the air conditioner unit. The tape is made of a durable, flexible material that can withstand various weather conditions, including extreme temperatures and humidity.

Key Features and Benefits

The THERMWELL Frost King AC43H Air Conditioner Weatherseal Tape offers several key features and benefits, including:

  • Easy to apply: The tape is simple to apply and requires no special tools or skills.
  • Durable: The tape is made of a long-lasting material that can withstand harsh weather conditions.
  • Flexible: The tape is flexible and can be easily cut to fit around corners and irregular shapes.
  • Energy efficient: By sealing gaps and cracks, the tape helps to reduce energy loss and lower utility bills.
  • Weather-resistant: The tape is resistant to extreme temperatures, humidity, and weather conditions.

How to Use the THERMWELL Frost King AC43H

Using the THERMWELL Frost King AC43H is straightforward. Simply follow these steps:

  1. Clean the area around the air conditioner unit to ensure a strong bond between the tape and the surface.
  2. Cut the tape to the desired length using a utility knife or scissors.
  3. Peel off the backing paper and apply the tape to the area, pressing firmly to ensure a tight seal.
  4. Repeat the process for all gaps and cracks around the air conditioner unit.

Conclusion

The THERMWELL Frost King AC43H Air Conditioner Weatherseal Tape is a simple yet effective solution for sealing gaps and cracks around air conditioner units. Its easy-to-apply design, durable material, and energy-efficient benefits make it a must-have for anyone looking to keep their home cool and comfortable while reducing energy waste. With its affordable price and long-lasting performance, the THERMWELL Frost King AC43H is an excellent investment for any homeowner. So why wait? Seal the deal with the THERMWELL Frost King AC43H Air Conditioner Weatherseal Tape today!

Customers say

Customers find the weatherseal tape works well for window units, keeping cold air in and preventing hot air from seeping through windows. The foam is heavy-duty and easy to use, with customers noting it’s easy to cut to fit perfectly. While customers appreciate the product’s quality and functionality, opinions about thickness are mixed, with some finding it too thick for certain gaps.

8 reviews for THERMWELL Frost King AC43H Air Conditioner Weatherseal Tape,…

  1. D –

    Reliable Seal, Easy Fix 🧊🛠️
    Reliable Seal, Easy Fix 🧊🛠️THERMWELL Frost King AC43H delivers a snug, secure seal for window AC units. It’s easy to apply, holds up well, and keeps drafts out—perfect for boosting efficiency without hassle.

  2. WitchyWoman –

    Great product for insulation!!
    Arrived as stated and does the job I bought it for. I use these for around my window a/c unit but I also live in a VERY old apt that has many cracks! These can be cut easily for use in sealing cracks around old windows in conjunction with the plastic I also use and these work wonderfully. Easy to install and I suggest the grey.Good quality! Good packaging! Great seller! Recommend!!

  3. LF –

    Excellent for Sealing Space Between Windows After AC Installation
    I purchased this to fill the space between two windowpanes in a side-to-side sliding window after installing a window air conditioner. There was about an inch of space between the panes in a high wind area with typical winds of 20mph and frequent 30mph gusts in normal weather conditions. Everything I tried quite literally blew right out of place. I decided to give this a try and ordered the 2-1/4 inch size, so that I had plenty of room to squish it down and let it expand into place. It worked great! It was easy to install. I just pressed it down as sliding into place a little at a time and then adjusted it to make sure it was straight and aligned with the window to ensure it looks nice. The foam is sturdy, yet easy to squish to install. It took less than 5 minutes to seal both window spaces inside and outside. It expanded into place and is tightly packed. The winds (and dirt they bring) don’t stand a chance!

  4. RichManSCTV –

    “Tape” is false, “Foam Strip” is correct
    First let me address this saying this is not TAPE. There is no sticky adhesion on it, nothing like a 3m tape that you remove some plastic and stick it on. This is just a foam strip.With that being said…. Its a GREAT one ! Perfect for that gap at the bottom of the air conditioner. Its too thick for the gap at the top of the open window but it is PERFECT for the large gap under the air conditioner. The weight of the unit compresses it and blocks all possible gaps.

  5. Kim D –

    Easy to use and effective
    Used as stuffing to keep bats out of barn roof. Works well and easy to use. Good thickness and length.

  6. AJ –

    Good material, very thick
    This product is exactly what I was looking for to stuff around my window AC Unit! Be aware that it is extremely thick, but it can be cut very easily with a utility knife. It is a pretty thick material also, not thin and flimsy like some brands.

  7. Stargazer –

    GOOD QUALITY
    Great quality, great price. Not only works great to seal air conditioners but has other uses as well. I recently used to close and fill in the gap beteeen the back seat of my car and the rear window that leads to the trunk. A short time ago, a bee flew into my car trunk. Thought I shooed away only to find it in my car by the rear window. How’d it get there…..flew into the car from this gap. How to solve tte problem? After much thought, came up with the idea to try this insulation, perfect length and width.It did the trick. Problem solved. Highly recommended.

  8. Oma –

    Okay.
    Easy to use, compresses well during install. Does its job, but lasts only a season or two. Dries out and crumbles.

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