Door Bottom Dust and Insect Blocker for Better Home Protection







- Stock: In Stock
- Brand: K&M
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Installation and Use Demonstration Video
Watch how to prepare, trim and install the door-bottom dust and insect blocker to fit your door, helping seal the gap and reduce the entry of dust, small insects and unwanted airflow without drilling.
The under-door draft stopper is a double-sided barrier consisting of two foam cylinders inside a flexible sleeve. It slides beneath the door to help cover the bottom gap and reduce the passage of drafts, dust, small insects, and light.
The barrier moves with the door as it opens and closes, reducing the need to reposition it after every use. Its current listed length is 100 cm, and it can be trimmed to match a narrower door without drilling, screws, or adhesive attachment.
Problem: A gap under a door may allow air, dust, light, and some small insects to move between areas and may allow conditioned air to escape.
Solution: The two foam cylinders sit on opposite sides of the door to cover the gap from both directions while moving with the door.
- Double-sided design covers both sides of the door bottom.
- Helps reduce drafts passing through the lower gap.
- Helps limit the entry of dust, dirt, and some small insects.
- May reduce light, odours, and light noise passing through the gap.
- Moves with the door during opening and closing.
- No drilling, screws, or adhesive required.
- 100 cm length can be trimmed to match the door width.
- Flexible EVA foam inner cylinders according to the product images.
- May be positioned from the front or rear according to the gap and opening direction.
- Available in brown, black, and grey × dark green according to the selection list.
- Bedroom and living-room doors.
- Office and meeting-room doors.
- Apartment entrances with compatible lower gaps.
- Air-conditioned rooms where airflow passes beneath the door.
- Reducing dust entering through a door gap.
- Reducing corridor light or light noise.
- Compatible wooden or metal doors.
- Measure the door from edge to edge before cutting the product.
- Confirm that there is sufficient space beneath the door for the sleeve to move freely.
- Remove the foam cylinders from the sleeve if necessary before trimming.
- Mark the door width on the foam and sleeve, leaving a small allowance before the final cut.
- Cut both foam cylinders to the same length using suitable scissors.
- Trim the sleeve carefully while preserving any finished or closing end where possible.
- Insert the two foam cylinders into their separate sleeve channels.
- Slide the middle section beneath the door so one cylinder sits on each side.
- Centre the stopper across the door width.
- Open and close the door slowly to confirm that it moves without excessive friction.
Without a door-gap barrier: The gap remains open and may allow drafts, dust, light, and small insects to pass between spaces.
With the double-sided stopper: Two foam cylinders cover opposite sides of the gap and move with the door, providing an adjustable and removable solution without permanent mounting.
EVA foam is flexible and can be trimmed to size. Remove surface dust using a soft cloth or brush. The sleeve may be cleaned gently by hand with lukewarm water and mild detergent if its construction permits, then allowed to dry completely before the foam is reinserted. Machine washability is not confirmed for this product, so hand cleaning is recommended. Do not wring the foam or expose it to direct heat.
- Doors no wider than the product’s uncut length.
- Lower gaps compatible with the foam-cylinder diameter.
- Smooth floors such as tile, wood, and laminate.
- Users who prefer installation without drilling or adhesive.
- Rooms affected by drafts or dust through the door bottom.
- Doors wider than 100 cm before trimming.
- Doors without sufficient clearance beneath them.
- Very large gaps that the foam cylinders cannot cover.
- Thick carpets that obstruct movement.
- Sliding or folding doors incompatible with this installation method.
- Exterior doors exposed directly to rain or standing water.
- Applications requiring certified airtight, waterproof, fire, or acoustic insulation.
| Situation | Suitability | What to Check |
|---|---|---|
| Door over tile | Generally suitable when clearance is sufficient. | Check that the sleeve glides without catching on tile joints. |
| Door over wood or laminate | Generally suitable for smooth surfaces. | Keep the sleeve clean so trapped grit does not rub against the floor. |
| Door over thin carpet | May be suitable after testing. | Confirm that it does not catch on carpet fibres. |
| Door over thick carpet | May not be suitable. | Test door movement before trimming the product. |
| Uneven lower gap | Effectiveness varies with the largest section of the gap. | Inspect coverage along the entire door width. |
| Property | Details |
|---|---|
| Product Type | Double-sided under-door draft and dust stopper |
| Design | Two foam cylinders, one on each side of the door |
| Filling Material | EVA foam according to the product images |
| Sleeve Material | Flexible textile-like cover; exact fibre type is not specified |
| Length | 100 cm according to the current description |
| Trimmable | Yes; foam and sleeve can be cut to the required door width |
| Installation | Slides beneath the door; no drilling, screws, or adhesive |
| Available Colours | Brown, black, and grey × dark green |
| Functions | Helps reduce drafts, dust, light, some insects, odours, and light noise through the lower gap |
| Water Resistance | Not confirmed; it is not a water or flood barrier |
| Cleaning | Gentle manual cleaning followed by complete drying |
| Package Contents | One double-sided door stopper in the colour selected from the list |
- Measure door width, lower-gap height, and door thickness before trimming.
- Test the product before making the final cut because removed material cannot be restored.
- The product reduces drafts, dust, and insects but does not guarantee complete prevention.
- Do not use it as a barrier against water, flooding, or dangerous reptiles.
- No certified thermal or acoustic insulation rating is provided.
- Friction may increase on carpets and uneven floors.
- Confirm that it does not prevent the door from closing or create a trip hazard.
- Keep foam and trimmed pieces away from children and animals.
What is a double-sided under-door draft stopper?
It is a barrier with two foam cylinders positioned on opposite sides of the door to reduce airflow and dust through the lower gap.
How long is the product?
The current description lists a length of 100 cm, which can be trimmed for narrower doors.
Does it require adhesive or drilling?
No. The middle section passes beneath the door while one foam cylinder rests on each side.
Does it move with the door?
Yes. When correctly fitted, it moves with the door during opening and closing.
Does it completely block insects and dust?
It helps reduce their passage through the lower gap, but effectiveness depends on measurements, gap size, and floor level. It does not guarantee a completely sealed barrier.
Does it stop water?
Water resistance is not confirmed, and the product should not be used as a barrier against rainwater, leaks, or flooding.
Can it help retain air conditioning?
It may reduce air movement through the lower gap, although overall insulation also depends on other gaps around the door.
Is it suitable for carpet?
It may work on low-pile carpet, but thick carpet can increase friction and obstruct the door. Test it before trimming.
Is it washable?
Removing the foam and gently hand-cleaning the sleeve is recommended. Machine washability is not confirmed.
Which colours are available?
The selection list includes brown, black, and grey × dark green. Choose the required option before adding it to the basket.
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