Is this waterproof? Would like to use prior to caulking outside of my cabin

It is waterproof. I would be sure to seal it with some sort of caulk afterwards though

Is this closed cell backer Rod?

I don't know, but it was what i needed to fill cracks.

What type tool is best for pushing this into the crevice?

I am sure you can find a good tool under caulk finishing or application. I just used my finger and the butt of a small round screwdriver. My project was not typical.

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Frost King C21CP-C Caulk Saver Bulk Contractor Pack, 3/8-inch Diameter x 350-feet Long, Grey

Frost King C21CP-C Caulk Saver Bulk Contractor Pack, 3/8-inch Diameter x 350-feet Long, Grey

Product ID: 51559763

Details

Brand
Frost King
Color
Gray
Item Form
Bag
Item Weight
15.36 ounces
Maximum Gap Fill
3.8

💧Moisture-repellent durability

📏350 feet continuous length

₩132328

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Description

🛠️ Seal smarter, save bigger — the pro’s secret weapon!

EFFORTLESS INSTALLATION - Flexible yet sturdy foam that installs quickly without tearing or crumbling.
BUILT TO WITHSTAND MOISTURE - Water-resistant polyurethane foam keeps your seals dry and durable.
MAXIMIZE YOUR CAULK EFFICIENCY - Stretch your caulk further with 350 feet of resilient foam backing.
TRUSTED BY PROS LOVED BY DI YERS - Highly rated with 4.6 stars and proven to save time and money on every project.
PRECISION FIT FOR SEAMLESS SEALING - 3/8-inch diameter designed to perfectly fill small gaps and cracks.

The Frost King C21CP-C Caulk Saver Bulk Contractor Pack offers 350 feet of durable, moisture-resistant polyurethane foam with a precise 3/8-inch diameter. Designed to reduce caulk usage and speed up sealing jobs, it’s flexible, easy to install, and trusted by professionals and DIY enthusiasts alike for reliable, long-lasting results.

Specifications

ASIN	B016PA9VBW
Best Sellers Rank	#49,946 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #299 in Weather Stripping
Brand Name	Frost King
Color	Gray
Customer Reviews	4.5 4.5 out of 5 stars (539)
Global Trade Identification Number	00077578060262
Included Components	Frost King - C21CP
Item Form	Bag
Item Type Name	Frost King - C21CP
Item Weight	15.36 ounces
Manufacturer	Thermwell Products
Material Type	Polyurethane
Maximum Gap Fill	3.8 centimeters
Model	Frost King - C21CP
Number of Items	1
Part Number	C21CP-C
Surface Recommendation	Walls
UPC	077578060262
Unit Count	350 Count
Water Resistance Level	Water Resistant

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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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The delivery time was excellent, and the packaging was secure.

2 months ago

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₩132328

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered 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 South Korea.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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