---
product_id: 63647039
title: "THERMWELL - 1-1/4 x 1-1/4 x 42-Inch Air Conditioner Foam Weather Seal"
brand: "frost king"
price: "$40.72"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/63647039-thermwell-1-1-4-x-1-1-4-x-42
store_origin: US
region: United States of America
---

# 1.25" thick foam strip 42" length for full window coverage Seals out air, insects & dust THERMWELL - 1-1/4 x 1-1/4 x 42-Inch Air Conditioner Foam Weather Seal

**Brand:** frost king
**Price:** $40.72
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal smart, save big—your AC’s new best friend!

## Quick Answers

- **What is this?** THERMWELL - 1-1/4 x 1-1/4 x 42-Inch Air Conditioner Foam Weather Seal by frost king
- **How much does it cost?** $40.72 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/63647039-thermwell-1-1-4-x-1-1-4-x-42)

## Best For

- frost king enthusiasts

## Why This Product

- Trusted frost king brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **All-Season Defense:** Open cell foam compresses to block drafts, dust, and pesky insects year-round.
- • **Durable & Discreet:** Sleek gray design blends seamlessly with your window frame for a clean, professional look.
- • **Effortless Installation:** Flexible, resilient strip adapts easily to window contours—no tools, no hassle.
- • **Energy Efficiency Booster:** Keep your cool air in and the heat out, slashing your energy bills with every use.
- • **Precision Fit, Maximum Seal:** 1-1/4" x 1-1/4" thickness ensures a snug, energy-saving barrier around your AC unit.

## Overview

The THERMWELL 1-1/4 x 1-1/4 x 42-Inch Air Conditioner Foam Weather Seal is a resilient, open cell foam strip designed to provide a tight, compressible seal around window air conditioners. Measuring 1.25 inches thick and 42 inches long, it effectively blocks air leaks, dust, and insects, enhancing energy efficiency and comfort while maintaining a low-profile, professional appearance.

## Description

THERMWELL - 1-1/4 x 1-1/4 x 42-Inch Air Conditioner Foam Weather Seal

## Features

- For Weather-Stripping Around Window Air Conditioners
- Resilient, Compressible Strip For Sealing Out Air, Insects & Dust
- Open Cell Foam Tape

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Thermwell Products Co., Inc |
| Part Number | AC42H |
| Product Dimensions | 16.51 x 16.51 x 0.3 cm; 18.14 g |
| Item model number | AC42H |
| Size | 1-1/4" W, 1-1/4" T, 42" L |
| Colour | Gray |
| Style | Traditional |
| Material | Other |
| Pattern | Solid |
| Thickness | 1.25 Inches |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 18.1 g |

## Product Details

- **Brand:** Frost King
- **Material:** Other
- **Colour:** Gray
- **Product dimensions:** 106.7L x 3.2W centimetres
- **Item thickness:** 1.25 Inches

## Images

![THERMWELL - 1-1/4 x 1-1/4 x 42-Inch Air Conditioner Foam Weather Seal - Image 1](https://m.media-amazon.com/images/I/81VkryKbY2L.jpg)
![THERMWELL - 1-1/4 x 1-1/4 x 42-Inch Air Conditioner Foam Weather Seal - Image 2](https://m.media-amazon.com/images/I/71JA3IWjiXL.jpg)
![THERMWELL - 1-1/4 x 1-1/4 x 42-Inch Air Conditioner Foam Weather Seal - Image 3](https://m.media-amazon.com/images/I/71QAeam1A8L.jpg)

## Frequently Bought Together

- Frost King AC42H Air Conditioner Weatherseal Tape, 1-1/4 by 1-1/4 by 42-Inch,Black
- THERMWELL Frost King AC43H Air Conditioner Weatherseal Tape, 2-1/4 by 2-1/4 by 42-Inch
- XFasten Transparent Window Weather Sealing Tape, 2-Inch x 30 Yards (50.8mm x 27.43m), Clear Window Draft Isolation Sealing Film Tape, No Residue

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-20*