You’ve got a few simple ways to cut down light leaks around a door. Mixing solutions tends to work best because light sneaks in from the sides, top, and bottom.

• Sides & top: Add adhesive weather stripping or kerf-style seals along the frame to close small edge gaps.
• Bottom gap: Use a door sweep or a weighted under-door draft stopper (slim or twin-style) to cover the threshold.
• Door glass: Apply blackout privacy film or hang an insulated curtain/cover if your door has windows.
• Fit tips: Measure gaps first, choose renter-friendly adhesives if needed, and check for carpet/rug clearance to avoid trip hazards.

Under-door draft blockers can reduce light and airflow when they’re sized and positioned well, but results vary by gap and floor type.

• Gap size: They’re most helpful when the blocker’s height matches the space under your door.
• Weight and width: Heavier, wider stoppers tend to sit flush on hard floors; twin designs that slide under the door can help on uneven surfaces.
• Fit: Choose a length that matches your door and trim if the design allows.
• Pairing: Combining a bottom blocker with frame weather stripping often improves light and draft control.
• Use: Reposition if it shifts and inspect for wear over time.

These products may also soften noise and dust movement but aren’t a complete weatherproofing solution.

There are quick fixes and longer-term options available at Walmart, depending on your space and whether you rent.

• Temporary: A rolled towel or foam noodle works in a pinch, though it can shift and create a trip risk.
• Weighted draft stopper: Simple to place, removable, and helpful for both light and drafts.
• Adhesive door sweep: A low-profile strip that seals the bottom edge; good for frequent use.
• Weather stripping: Foam or silicone tape around the frame reduces edge glow.
• Blackout film/curtains: For doors with windows, removable privacy film or a magnetic/thermal curtain helps darken the room.

Match the solution to your gap size, floor type, and how permanent you want the fix to be.

Getting the right size makes a big difference in blocking light and drafts.

1. Measure door width: Choose a stopper equal to or slightly longer than the door; many can be trimmed to fit.
2. Measure the gap height: Compare your gap to the stopper’s diameter or the sweep’s sealing range listed in the product details.
3. Check your floor: Hard floors often need a flush fit; carpets may need a taller profile.
4. Pick a style: Single “log,” twin under-door designs, or adhesive sweeps each fit differently.
5. Combine if needed: For large or uneven gaps, add frame weather stripping for the sides/top.

If you’re renting, look for slide-on or weighted, non-adhesive options for easy removal.

A little upkeep can help your draft stopper work well and last longer.

• Surface clean: Vacuum or lint-roll regularly to remove dust and pet hair.
• Spot treat: Dab stains with mild detergent and water; avoid soaking if it’s filled with sand, beads, or foam.
• Dry thoroughly: Air-dry completely before putting it back to prevent odors or mildew.
• Removable covers: If the cover zips off, follow the care tag and wash on a gentle, cold cycle.
• Storage: Keep it off damp floors and away from direct heaters.
• Check wear: Inspect seams and end caps; repair or refill according to the product instructions.