Is $44.95 a good price for the 10-pack?

It works out to about $4.50 per cover, and only two stores list it new as of November 4, 2026, so there is little discounting to wait for. Compare against cutting your own foam board if you have many vents.

Will these fit my foundation vents?

They are 6.5 by 8.75 inches, a common large foundation vent size. Measure your opening first; if it is smaller, the foam can be trimmed with a utility knife for a snug fit.

Do I leave them in all year?

No. They seal airflow, which is what you want in winter for freeze protection and draft reduction. Pull them out in warm months so the crawlspace can vent moisture.

Will they keep out mice and insects?

They block the open vent, which stops most rodents and insects from walking in. They are foam, not metal mesh, so a persistent animal can chew or push at them.

Ten foam vent covers in the 6.5 by 8.75 inch size, gray on one face and dark brown on the other. No tools or hardware are included because none are needed.

Where is the SwiftSeal Foundation Vent Covers 10 cheapest?

At Amazon, for $44.95, as of our latest check.

Where can I buy the SwiftSeal Foundation Vent Covers 10?

2 stores we checked sell it, including Amazon, Walmart.

SwiftSeal Foundation Vent Covers 10

Best price now

$44.95at AmazonObserved at 3:09 PM

Compared across 2 stores. Prices are checked against each store and labelled with when.

Visit Amazon

SwiftSeal Foundation Vent Covers 10

Best price now

$44.95at AmazonObserved at 3:09 PM

Compared across 2 stores. Prices are checked against each store and labelled with when.

Visit Amazon

Ask our agent about this product

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Our take on the SwiftSeal Foundation Vent Covers 10

These are foam inserts that block foundation crawlspace vents, sold in a 10-pack sized 6.5 by 8.75 inches. They are reversible, gray on one side and dark brown on the other, and can be trimmed to fit. The point is to shut out winter cold, moisture, insects and rodents and cut drafts under the floor. At $44.95 for ten at Amazon as of November 4, 2026, that is about $4.50 per cover, and only two stores list them new, so there is little price competition to shop around.

Best forOwners of pier-and-beam or crawlspace homes with open foundation ventsWinter freeze protection for pipes under the floorSealing vents against rodents and insectsHomeowners who want a no-tool, removable seasonal cover

Pros

No tools needed; push in and trim with a knife
Reversible gray or dark brown to match the exterior
Foam resists crumbling and cracking, rated to last over 10 years
Ten covers per pack suits a typical crawlspace vent count
Easy to pull out again for summer ventilation

Cons

Foam blocks airflow, so vents must be reopened in warm, humid months
One size only; odd vent sizes need trimming and may fit loosely
No rigid frame or mechanical latch, so a determined animal can push one out
At $44.95 for ten, cost per cover is higher than plain foam board cut by hand

SwiftSeal Foundation Vent Covers 10 prices at every store

WalmartNew
In stockSold by Baby Safety Foam
$44.95Free shippingObserved at 3:09 PM
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AmazonNew
Availability unknown
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$44.95Free shippingObserved at 3:09 PM
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Also available at

WalmartCheck price at Walmart

SwiftSeal Foundation Vent Covers 10 price history

Lowest price we've seen: $44.95 on Nov 4 at Walmart. Tracked across 2 stores since Nov 4.

About the SwiftSeal Foundation Vent Covers 10

The SwiftSeal Foundation Vent Covers, available in a convenient 10-pack, offer a durable and long-term solution for sealing your home's foundation vents. These airtight blocks are designed to effectively keep out cold air, moisture, insects, and rodents, while also helping to reduce drafts and heating costs. Featuring a reversible design with gray on one side and dark brown on the other, they can easily match your home's exterior. Built to last over 10 years, these durable foam inserts won't crumble or crack, providing year-round performance and freeze protection for pipes. They install quickly and effortlessly without tools, and can be custom-trimmed for a perfect fit.

Specifications

size: Large 6.5"x8.75" (10pack)Source
color: BrownSource

Questions and answers

Is $44.95 a good price for the 10-pack?: It works out to about $4.50 per cover, and only two stores list it new as of November 4, 2026, so there is little discounting to wait for. Compare against cutting your own foam board if you have many vents.
Will these fit my foundation vents?: They are 6.5 by 8.75 inches, a common large foundation vent size. Measure your opening first; if it is smaller, the foam can be trimmed with a utility knife for a snug fit.
Do I leave them in all year?: No. They seal airflow, which is what you want in winter for freeze protection and draft reduction. Pull them out in warm months so the crawlspace can vent moisture.
Will they keep out mice and insects?: They block the open vent, which stops most rodents and insects from walking in. They are foam, not metal mesh, so a persistent animal can chew or push at them.
What is in the box?: Ten foam vent covers in the 6.5 by 8.75 inch size, gray on one face and dark brown on the other. No tools or hardware are included because none are needed.
Where is the SwiftSeal Foundation Vent Covers 10 cheapest?: At Amazon, for $44.95, as of our latest check.
Where can I buy the SwiftSeal Foundation Vent Covers 10?: 2 stores we checked sell it, including Amazon, Walmart.