Can you double up on it if it's not thick enough?

Yes you should be able to with it being sticky it will stick to itself and double the thickness

Does it keep dust out?

i used it on my comp , & i haven't had any problems with dust. just be sure to seal it tight when using it. Darlene.

Could this be used to fill gaps between door sides and frame where bugs are coming in?

I believe so; we used this to fill a gap around our door. The intent was to keep the cold air from coming in during the winter months, but it works to seal the gap, preventing anything from coming in/out (air, bugs, etc.).

is this double stick?

if you mean double sided adhesive, the answer is no

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Frost King R338H Self-Stick Rubber Foam Weatherseal, Black|Blacks, 3/8" W, 3/16" T

Frost King R338H Self-Stick Rubber Foam Weatherseal, Black|Blacks, 3/8" W, 3/16" T

Product ID: 62363107

Details

Brand
Frost King
Colour
Black|blacks
Item thickness
0.25 Inches
Material
Rubber
Product dimensions
3.05L x 0.01W

📏3/8" W x 3/16" T precision fit

🛠️10 ft self-stick easy install

🇺🇸Made in USA quality

¥3532

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Description

🛡️ Seal the deal on comfort and style—don’t let drafts or noise crash your vibe!

VERSATILE USE CASES - Ideal for windows, doors, automotive, marine, and even creative tech hacks like speaker soundproofing.
DURABILITY THAT LASTS - Extra tough rubber foam engineered to absorb shocks and resist wear over time.
PROUDLY AMERICAN MADE - Crafted in the USA, guaranteeing premium quality and supporting local manufacturing.
EFFORTLESS DIY UPGRADE - Self-adhesive backing ensures a quick, no-mess installation—no tools or professionals needed.
PRECISION SEAL FOR ULTIMATE COMFORT - Perfect 3/8" width and 3/16" thickness to block drafts and noise with surgical accuracy.

The Frost King R338H is a 10-foot long, 3/8" wide by 3/16" thick black rubber foam weatherseal tape made in the USA. Designed for superior shock absorption and durability, it features a self-adhesive backing for easy installation. Perfect for sealing gaps around windows, doors, vehicles, and appliances, it offers a versatile, high-quality solution to enhance comfort and energy efficiency.

Specifications

ASIN	B000BQWWF4
Best Sellers Rank	150,073 in DIY & Tools ( See Top 100 in DIY & Tools ) 335 in Weather Stripping
Brand	Frost King
Colour	Black\|blacks
Country of Origin	USA
Customer Reviews	4.2 4.2 out of 5 stars (2,471)
Included Components	No
Item Dimensions L x W	3.05L x 0.01W metres
Item Thickness	0.25 Inches
Item Type Name	Rubber Foam Weatherseal
Item Weight	0.6 Ounces
Manufacturer	Frost King
Material	Rubber
Model Number	R338H
Number of Items	1
Number of Packs	1
Part Number	R338H
Recommended Uses For Product	weatherstripping, sealing gaps in vehicles, cushioning and stabilizing appliances
UPC	077578012209
Unit Count	10.0 meter

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Good experience, but the tracking updates could be better.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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¥3532

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

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TrustScore 4.5 | 7,300+ reviews

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