This adjustable seal (10×40-64″) fits 5″/6″ exhaust hoses on sliding windows, creating true “zero-gap” cooling efficiency.

Key Features

• Universal Fit: 1-6″ hoses; 40-64″ adjustable length for most sliders

• Waterproof TU Fabric: Blocks rain, insects, sunlight (thermal reflective)

• Tool-Free Install: Velcro tape + drawstring cuff (5 mins)

• Double-Stitched: Reinforced—no zipper failures like cheap kits

• Trim-to-Fit: Customizes perfectly

Performance Benefits

Cooling Boost: Proper sealing = 20-30% faster room cooling, lower bills
Bug/Rain Proof: No more mosquitoes or leaks during storms
Energy Savings: Contains cold air vs wasting AC power
#1 New Release: 100+ monthly sales, 5-star perfect rating (13 reviews)

Pros:

• Actually seals (not decorative)

• Survives rain/wind better than zippers

• 5-min install beats plexiglass DIY

• $26.99 < custom window inserts

• Universal hose compatibility

Cons:

• Sliding windows only (no crank/tilt)

• Velcro loses stickiness after 1-2 seasons

• White fabric shows dirt outdoors

• Single-use adhesive (re-tape yearly)

Who Needs This

✅ Portable AC owners (all brands)
✅ Hot climates (essential sealing)
✅ Renters (no drilling)
✅ Summer warriors (instant efficiency)

Skip if you have central AC or fixed windows.

Installation Reality

1. Clean window track

2. Stick included Velcro tape

3. Thread hose through drawstring hole

4. Pull tight + Velcro seal

5. Trim excess fabric

Pro Tip: Install 24hrs before AC use for max adhesion.

Verdict: 4.9/5 – Must-have for portable AC efficiency. Fixes the worst design flaw. Perfect $26.99 summer upgrade.

Disclosure: As an affiliate, I may earn from qualifying purchases at no extra cost to you.