---
product_id: 540847828
title: "Portable AC Window Seal Kit 400CM (157\") – Universal No-Drill Window Vent for Casement, Crank & Skylight Windows – Adjustable Zipper Seal for Single or Dual Hose Portable Air Conditioners"
brand: "ikstar"
price: "R1408"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Ikstar"
url: https://www.desertcart.co.za/products/540847828-portable-ac-window-seal-kit-400cm-157-universal-no-drill
store_origin: ZA
region: South Africa
---

# Tool-free, easy installation & removal Reusable & eco-friendly design 78% boost in cooling efficiency Portable AC Window Seal Kit 400CM (157") – Universal No-Drill Window Vent for Casement, Crank & Skylight Windows – Adjustable Zipper Seal for Single or Dual Hose Portable Air Conditioners

**Brand:** ikstar
**Price:** R1408
**Availability:** ✅ In Stock

## Summary

> ❄️ Seal the heat out, keep the cool in — your AC’s new best friend!

## Quick Answers

- **What is this?** Portable AC Window Seal Kit 400CM (157") – Universal No-Drill Window Vent for Casement, Crank & Skylight Windows – Adjustable Zipper Seal for Single or Dual Hose Portable Air Conditioners by ikstar
- **How much does it cost?** R1408 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/540847828-portable-ac-window-seal-kit-400cm-157-universal-no-drill)

## Best For

- ikstar enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Smart & Reusable:** Sustainable design that’s easy to clean and reuse season after season—good for your wallet and the planet.
- • **Maximize Your AC Power:** Seal gaps to increase cooling efficiency by 78%, slashing energy waste and bills.
- • **Durable & Weather-Resistant:** Made from thickened translucent material with 4 zipper settings to block heat, rain, and outdoor irritants.
- • **Effortless Setup, Zero Damage:** Install in minutes without drills or tools; leaves no marks and keeps windows fully functional.
- • **Universal Fit for Casement Windows:** Compatible with most casement and skylight windows up to 157" perimeter—your go-to AC seal solution.

## Overview

The Upgrade Portable AC Window Seal is a versatile, reusable sealing solution designed for casement and skylight windows up to 157" perimeter. It boosts portable AC cooling efficiency by 78% by eliminating air gaps, installs easily without tools or damage, and features durable, weather-resistant materials with adjustable zippers. Perfect for energy-conscious professionals seeking a sleek, eco-friendly way to keep their living spaces cool and comfortable.

## Description

Easy Installation/Better Sealing/Security & Flexibility/Replacement Solution/Multi-purpose venting/Seasonal convenience/Aesthetic preference

Review: Gets the job done! - Held up in full sun for entire summer. If you shut off your ac when it is humid, the adhesive may release on one side. We found that reinforcing with weather seal tape addressed the issue. It gives enough extra that you can easily fit it in a window. I recommend installing from top to bottom and on the straightest part of your window first. It is not hard to install, but it depends on your ability to peel carefully and how well you have cleaned and prepared the area. It did a good job of keeping the heat out, but I recommend also purchasing an insulating sleeve for the AC unit inside to get the full benefit. It is the same thickness aso one of those stuff in a tiny pouch windbreakers. So it's thin, but does what it needs to do. Good value for the money.
Review: Works! - Not easy to figure out how to use an ac unit in a window like this! We have an old house so these crank completely out. So both sides need to be sealed. It wasn’t difficult to install, just use the adhesive to apply all around the window frame and then velcro the plastic pieces together. It doesn’t look the most attractive from the outside but it’s better than dying of heat! There’s normally No leakage but if there is a heavy rain, the way it seals together on the top of the window creates a pocket… so it will start to get filled with water and can leak down the sides a bit. How to solve that is to raise it up making a pitch in the plastic so it drains off the sides so it won’t collect there. The zipper opens large enough to attach the hose through. It really is the best solution for this weird type of window. Ok, the only one! Haha

## Features

- ✅Designed for Casement, Crank-Out & Skylight Windows：This portable AC window seal kit is designed for casement, crank-out, push-out and skylight windows where standard sliding window panels may not fit. It fits window perimeters up to 400CM / 157" and offers a practical window vent solution for non-sliding window types.
- 🌟Fits Single & Dual Hose Portable Air Conditioners：The adjustable zipper opening works with single and dual hose portable air conditioners, making it easier to position the exhaust hose at different heights. A flexible portable AC window vent kit for a cleaner setup than rigid window panels with fixed hose ports.
- ❄Helps Reduce Hot Air Backflow for Better Cooling：By sealing the open window area around the exhaust hose, this portable air conditioner window seal helps reduce warm outdoor air from flowing back inside. It supports more efficient cooling and helps keep your room more comfortable during hot weather.
- 🔨No-Drill Installation for Apartments & Seasonal Use：Install this AC window seal kit without drilling or special tools. Simply clean and dry the window frame, apply the hook tape, attach the seal, place the hose through the zipper opening, and tighten around it. A convenient choice for apartments, renters, bedrooms and home offices.
- 🌝Measure Before Ordering for the Best Fit：This 400CM / 157" window seal is best suited for clean, smooth window frames and seasonal portable AC use. Please measure your window before ordering to ensure the correct fit. A more adjustable alternative to cardboard or tape DIY setups for casement and crank windows.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BLH4Y374 |
| Batteries required | No |
| Customer Reviews | 3.8 3.8 out of 5 stars (207) |
| Date First Available | 19 December 2022 |
| Included components | ac window kit, ac window seal, sliding door air conditioner kit, window air conditioner installation kit, window venting kit for portable ac |
| Item model number | 4M |
| Product Dimensions | 2.54 x 2.54 x 2.54 cm; 322 g |

## Images

![Portable AC Window Seal Kit 400CM (157") – Universal No-Drill Window Vent for Casement, Crank & Skylight Windows – Adjustable Zipper Seal for Single or Dual Hose Portable Air Conditioners - Image 1](https://m.media-amazon.com/images/I/611lXPZDkxL.jpg)

## Questions & Answers

**Q: Will this fit my casement or crank-out window?**
A: Yes. It is designed for casement, crank-out, push-out, skylight and other non-sliding windows. Please measure your window before ordering.

**Q: How do I choose between the 300CM and 400CM size?**
A: Measure the total perimeter of your window frame. Choose 300CM for up to 118", and 400CM for up to 157". Pick the closest larger size.

**Q: Can it work with single hose and dual hose portable AC units?**
A: Yes. The adjustable zipper opening works with both single and dual hose portable air conditioners, as well as many dehumidifiers and tumble dryers.

**Q: Do I need tools or drilling to install it?**
A: No tools or drilling required. Clean the frame, apply the hook tape, attach the seal, place the hose through the zipper, and close it around the hose.

**Q: Does it help keep hot air from coming back inside?**
A: Yes. It helps seal the open window area around the exhaust hose, reducing hot air backflow and supporting more efficient summer cooling.

## Customer Reviews

### ⭐⭐⭐⭐ Gets the job done!
*by M***T on 20 August 2025*

Held up in full sun for entire summer. If you shut off your ac when it is humid, the adhesive may release on one side. We found that reinforcing with weather seal tape addressed the issue. It gives enough extra that you can easily fit it in a window. I recommend installing from top to bottom and on the straightest part of your window first. It is not hard to install, but it depends on your ability to peel carefully and how well you have cleaned and prepared the area. It did a good job of keeping the heat out, but I recommend also purchasing an insulating sleeve for the AC unit inside to get the full benefit. It is the same thickness aso one of those stuff in a tiny pouch windbreakers. So it's thin, but does what it needs to do. Good value for the money.

### ⭐⭐⭐⭐⭐ Works!
*by T***K on 14 October 2025*

Not easy to figure out how to use an ac unit in a window like this! We have an old house so these crank completely out. So both sides need to be sealed. It wasn’t difficult to install, just use the adhesive to apply all around the window frame and then velcro the plastic pieces together. It doesn’t look the most attractive from the outside but it’s better than dying of heat! There’s normally No leakage but if there is a heavy rain, the way it seals together on the top of the window creates a pocket… so it will start to get filled with water and can leak down the sides a bit. How to solve that is to raise it up making a pitch in the plastic so it drains off the sides so it won’t collect there. The zipper opens large enough to attach the hose through. It really is the best solution for this weird type of window. Ok, the only one! Haha

### ⭐⭐⭐ Glue melts in sun - not a good seal
*by S***T on 21 August 2026*

the velcro strips got unglued as the window was in the full sun. Resorted to duct tape to stop the daily gapping. Too late to return. Bought Martinson's plexiglass insert - expensive but does the trick

## Frequently Bought Together

- 400CM (157") Portable AC Window Seal Kit for Casement Crank Skylight Windows, Newest Waterproof Insulated Window Vent Kit with Flexible Zipper Design for Single&Dual Hose Air Conditioners, No Drilling
- 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
- BLACK+DECKER Smart Portable Air Conditioner, 12,000 BTU for Rooms up to 550 Sq. Ft., Smart Portable AC with Follow Me Remote and Window Kit, BPACT12WT, White

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-09-25*