Enjoy fast, free delivery, exclusive deals, and award-winning movies & TV shows with Prime
Try Prime and start saving today with fast, free delivery

Get Fast, Free Shipping with Amazon Prime FREE Returns

FREE delivery Monday, May 13 on orders shipped by Amazon over $35. Order within 15 hrs 22 mins

Select delivery location

In Stock

$$33.79 () Includes selected options. Includes initial monthly payment and selected options. Details

Enhancements you chose aren't available for this seller. Details

${cardName} not available for the seller you chose

${cardName} unavailable for quantities greater than ${maxQuantity}.

Ships from

Amazon.com

Ships from

Amazon.com

Sold by

Amazon.com

Sold by

Amazon.com

Returns

Eligible for Return, Refund or Replacement within 30 days of receipt

Returns

Eligible for Return, Refund or Replacement within 30 days of receipt

This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.

Read full return policy

Packaging

Ships in product packaging

Packaging

Ships in product packaging

This item has been tested to certify it can ship safely in its original box or bag to avoid unnecessary packaging. Since 2015, we have reduced the weight of outbound packaging per shipment by 41% on average, that’s over 2 million tons of packaging material.

If you still require Amazon packaging for this item, choose "Ship in Amazon packaging" at checkout. Learn more

Payment

Secure transaction

Payment

Secure transaction

We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more

Details

Add a gift receipt for easy returns

FREE delivery Monday, May 13 on orders shipped by Amazon over $35. Order within 15 hrs 22 mins

In Stock

Deliver every:

$$33.79 () Includes selected options. Includes initial monthly payment and selected options. Details

Enhancements you chose aren't available for this seller. Details

${cardName} not available for the seller you chose

${cardName} unavailable for quantities greater than ${maxQuantity}.

Ships from and sold by Amazon.com

Other sellers on Amazon

New (5) from $33.79 FREE Shipping on orders over $35.00 shipped by Amazon.

fill them cracksJackie Moravek

Image Unavailable

Image not available for
Color:

To view this video download Flash Player

Frost King C21CP-C C23CP-C Caulk Saver Bulk Contractor Pack, 5/8-inch Diameter x 150-feet Long, Grey, 3/8" x diam. x 350 ft

Visit the Frost King Store

4.6 817 ratings

Amazon's Choice in Adhesive Caulk by Frost King

$33.79 $0.10 per Foot

Get Fast, Free Shipping with Amazon Prime

FREE Returns

Style: 3/8"D X 350'L

{"desktop_buybox_group_1":[{"displayPrice":"$33.79","priceAmount":33.79,"currencySymbol":"$","integerValue":"33","decimalSeparator":".","fractionalValue":"79","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"aM8k1JAOAAKLu%2BCFKhiPNVMhzm05h8pfLh5jFCk6L%2Bdgh5JFotT54duWetptOtK%2Ba9WVTAuN5uuOQdUsONO%2BhgoayBjLcMC6IkNjMSix3cXz2k9Q8AyL%2B5r3fhoI9YzjAiT81J5WEynX316nl3JCyw%3D%3D","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}, {"displayPrice":"$33.79","priceAmount":33.79,"currencySymbol":"$","integerValue":"33","decimalSeparator":".","fractionalValue":"79","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":null,"locale":"en-US","buyingOptionType":"SNS","aapiBuyingOptionIndex":1}]}

Purchase options and add-ons

Color	Gray
Brand	Frost King
Item Weight	0.96 Pounds
Item Form	Foam
Water Resistance Level	Waterproof

About this item

Foam
Saves on expensive caulk
Works with virtually all caulk
Moisture repellant
Made of durable, resilient poly foam
Easy to use and install

› See more product details

Customer ratings by feature

Easy to install

5.0

Value for money

4.7

Easy to use

4.6

See all reviews

Report an issue with this product or seller

Frequently bought together

Frost King C21CP-C C23CP-C Caulk Saver Bulk Contractor Pack, 5/8-inch Diameter x 150-feet Long, Grey, 3/8" x diam. x 350 ft

$33.79 ($0.10/Foot)

Get it as soon as Monday, May 13

In Stock

Ships from and sold by Amazon.com.

Sashco 30251 Pre-Caulking Filler Rope Backer Rod Roll, 100' Length x 1/4" Width, Grey, 1/4" x 100'

$13.34

Get it May 10 - 14

In Stock

Ships from and sold by Hearthshire.

Sikaflex Self Leveling Sealant, Sandstone, Polyurethane with an Accelerated Curing Capacity for Sealing Horizontal Expansion

$17.31 ($0.60/Fl Oz)

Get it as soon as Monday, May 13

In Stock

Ships from and sold by Amazon.com.

Total price:

To see our price, add these items to your cart.

Try again!

Details

Added to Cart

These items are shipped from and sold by different sellers.

Show details Hide details

Choose items to buy together.

3,170
Amazon's Choice
in Caulk
10 offers from $4.27
817
7 offers from $26.78
817
Amazon's Choice
in Adhesive Caulk
6 offers from $32.20
331
2 offers from $19.99
55
1 offer from $21.99
15
1 offer from $33.99

Product information

Technical Details

Manufacturer

‎Frost King

Part Number

‎C21CP-C

Item Weight

‎15.4 ounces

Product Dimensions

‎12 x 9.88 x 10.25 inches

Country of Origin

‎USA

Item model number

‎C21CP-C

Size

‎3/8" x diam. x 350 ft

Color

‎Gray

Style

‎3/8"D X 350'L

Item Package Quantity

‎1

Included Components

‎Poly Foam Caulk Saver

Batteries Included?

‎No

Batteries Required?

‎No

Additional Information

ASIN

B016PA9VBW

Customer Reviews

4.6 817 ratings

4.6 out of 5 stars

Best Sellers Rank

#11,320 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
#56 in Adhesive Caulk

Date First Available

October 15, 2015

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Feedback

Would you like to tell us about a lower price?

Looking for specific info?

From the manufacturer

Caulk Saver

Caulk Saver Reduces the amount of caulk you need to fill or seal large openings. Made of durable, resilient poly foam, it works with virtually every type of caulk and sealant. Save on expensive caulk Works with virtually all caulks Moisture repellent Where to buy Download Instructions PRODUCT SKU UPC SPECS COLOR C21H 077578024288 3/8" diam. x 20 ft N/A C22H 077578024295 1/2" diam. x 20 ft N/A C23H 077578021508 5/8" diam. x 20 ft N/A C24H 077578061252 3/4" diam. x 20 ft N/A C25H 077578062822 1" diam. x 20 ft N/A Bulk Contractor Packs C21CP 077578060262 3/8" diam. x 350 ft N/A C22CP 077578060279 1/2" diam. x 250 ft N/A C23CP 077578060286 5/8" diam. x 150 ft N/A C25CP 077578061948 1" diam.x 600 ft N/A C26CP 077578061955 1-1/4" diam. x 400 N/A C27CP 077578061962 ft 1-1/2" diam. x 396 ft N/A C28CP 077578061979 2" diam.x 220 ft N/A

Product Description

Frost King caulk Saver reduces the amount of caulk you need to fill or seal large openings. Made of durable, resilient poly foam, it works with virtually every type of caulk and sealant.

Top Brand: Frost King

Highly Rated

100K+ customers rate items from this brand highly

Trending

100K+ orders for this brand in past 3 months

Low Returns

Customers usually keep items from this brand

Compare with similar items

	This Item Frost King C21CP-C C23CP-C Caulk Saver Bulk Contractor Pack, 5/8-inch Diameter x 150-feet Long, Grey, 3/8" x diam. x 350 ft	Recommendations 300 Ft Caulk Saver Foam Backer Rod 3/8 Inch Rope Caulk Foam Backer Rod for Gaps and Joints Backing Rod Concrete Filler Rope	dummy Sashco 31002 Pre-Caulking Filler Rope Backer Rod Roll, 50' Length x 1" Width, Grey	dummy M-D Building products 71551 - Versatile Caulk Backer Rod Set 3/8in x 350ft - Essential Foam Rods for Precise Caulking and Sealing	dummy Backer Rod Foam Caulk Saver for Gap and Joint Concrete Filling Gray (3/4" Diameter x 32' Length)	dummy 3/4" Closed Cell Backer Rod - 100 ft Roll
	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart
Price	$33.79	$33.99	$27.39	$31.28	$18.99	-24% $19.00 List: $25.00
Delivery	Get it as soon as Monday, May 13	Get it as soon as Monday, May 13	Get it May 13 - 14	Get it as soon as Monday, May 13	Get it as soon as Tuesday, May 14	—
Customer Ratings	4.6817	4.215	4.63,043	4.719	4.4109	4.6350
Value for money	4.7	2.3	4.5	4.4	—	4.7
Easy to use	4.6	2.3	4.7	4.6	—	4.9
Easy to install	5.0	—	—	5.0	—	4.5
Durability	—	2.3	4.5	5.0	—	—
Sold By	Amazon.com	DonSeartSun	HardwareUSA	Amazon.com	Nancy Needham	Home Hardware Solutions
form	Foam	Foam	Foam	Foam	Foam	Foam
water resistance	waterproof	waterproof	—	waterproof	waterproof	waterproof
weight	0.96 pounds	—	6.4 ounces	1 pounds	—	—

Customer reviews

4.6 out of 5

817 global ratings

How customer reviews and ratings work

Customers say

Customers like the value, quality and performance of the caulk. For example, they mention it's a good product, works well and easy to install. They also like the seal. That said, opinions are mixed on the fit.

AI-generated from the text of customer reviews

17 customers mention17 positive0 negative

Customers are satisfied with the value of the caulk saver. They mention that it works great, saves them money and time, and is of the right size and price.

"...This product worked perfectly for that, and was VERY economical. Would gladly recommend to others." Read more

"Great Value!" Read more

"I have worked with this kind of product before. The price was perfect. I also found other ways that I could use it...." Read more

"...Glad it I found it on Amazon, the price was way cheaper and delivery prompt. The Frost King caulk saver worked as it should. Rated 5-stars." Read more

16 customers mention13 positive3 negative

Customers like the quality of the caulk. They say it's a good product, easy to use, and performs as designed.

"This product could literally be used for the whole neighborhood. Quality product which is provided in abundance." Read more

"...Good quality. Would recommend." Read more

"Good product and good value. Worked great to use around my new windows." Read more

"good buy" Read more

12 customers mention12 positive0 negative

Customers are satisfied with the performance of the caulk. They mention that it works well for filling in cracks, LP siding jobs, and insulating windows. They also say it's affordable.

"...This product worked perfectly for that, and was VERY economical. Would gladly recommend to others." Read more

"...Also works great for LP siding jobs, where gaps need to be left for expansion." Read more

"...For filling in cracks though it works very well...." Read more

"The product worked well for the gap that we had to fill in with and was able to put trim board over it for the purpose that we needed it for." Read more

7 customers mention7 positive0 negative

Customers find the installation process of the caulk to be easy. They mention that it's simple and makes the job a lot easier.

"Easy to use, perfect size for filling gaps on log walls, check marks and corners on a log home maintenance job...." Read more

"...Very pleased with appearance and ease of installation. I dont think we will even need to caulk since this filled the gaps so well." Read more

"...Unlike other sellers, this comes in a box, making it easy to handle compared to just stuffing it in a bag...." Read more

"...Made the job a lot easier. I would buy again." Read more

5 customers mention5 positive0 negative

Customers are satisfied with the seal. They mention that it works well for sealing cracks, floors, and drafts from under base boards. It is also a great addition for tightening up seals around flooring.

"...I also found other ways that I could use it. Not only did it go into my concrete cracks so I could then not have to use so much self-leveling..." Read more

"This stuff works great for filling in cracks and crevaces. I wouldn't use it for anything very deep or else you'll need multiple layers...." Read more

"Works as described. Great addition for tightening up seals around flooring." Read more

"Perfect to seal drafts from under base boards..." Read more

6 customers mention3 positive3 negative

Customers are mixed about the fit of the caulk. Some mention it's easy to use, perfect size for filling gaps on log walls, check marks, and corners. However, others say that it't big enough and doesn't fit in the grove.

"Easy to use, perfect size for filling gaps on log walls, check marks and corners on a log home maintenance job...." Read more

"...Same goes for anything large than half an inch roughly. Not big enough. The only gripe I have is the ease at which it flattens out...." Read more

"...I dont think we will even need to caulk since this filled the gaps so well." Read more

"It was just a little big for my project" Read more

Reviews with images

See all photos

Sort reviews by

Top reviews from the United States

There was a problem filtering reviews right now. Please try again later.

Picky Bob

THE best way to purchase this product!

Reviewed in the United States on January 26, 2024

Style: 1/2"D X 250'LVerified Purchase

Needed a large amount of tubing to complete the fit of insulation panels in our garage doors. This product worked perfectly for that, and was VERY economical. Would gladly recommend to others.

One person found this helpful

Helpful

Horacio

Good quality

Reviewed in the United States on February 8, 2024

Style: 1/2"D X 250'LVerified Purchase

Just what I needed to fill in the concrete gaps.

Helpful

t h

Great Price!

Reviewed in the United States on May 25, 2020

Style: 3/8"D X 350'LVerified Purchase

Great Value!

Helpful

justice

Great for filling gaps and check marks on log homes.

Reviewed in the United States on November 1, 2023

Style: 3/8"D X 350'LVerified Purchase

Easy to use, perfect size for filling gaps on log walls, check marks and corners on a log home maintenance job. Bought smaller size as I pack larger gap and build out the caulk layer. Also works great for LP siding jobs, where gaps need to be left for expansion.

Helpful

Nokey

Great

Reviewed in the United States on December 21, 2023

Style: 1/2"D X 250'LVerified Purchase

I have worked with this kind of product before. The price was perfect. I also found other ways that I could use it. Not only did it go into my concrete cracks so I could then not have to use so much self-leveling product in order to fill the gaps. I was also able to use it to help keep the breeze out of some of my old windows. I love this stuff! I also used it, to wrap it around some of my smaller PVC pipes to keep it from freezing. After wrapping it around the PVC pipes I then used duct tape to keep this in place.

Helpful

Edersf

Great Value

Reviewed in the United States on January 9, 2024

Style: 1/2"D X 250'LVerified Purchase

I needed some caulk saver for use on a laminate floor install. The size (1/2"d) was not available at my local Home Depot store. Glad it I found it on Amazon, the price was way cheaper and delivery prompt. The Frost King caulk saver worked as it should. Rated 5-stars.

Helpful

alex

Great product and great value.

Reviewed in the United States on December 5, 2023

Style: 3/8"D X 350'LVerified Purchase

Used it on the majority of the perimeter of home.

Helpful

Kindle Customer

Not resilient for crafting

Reviewed in the United States on February 21, 2022

Style: 1/2"D X 250'LVerified Purchase

If you are using it as intended it is probably perfect. If you are crafty & looking for something that will return to its round form time after time, keep looking. It looses its 'rebound' fairly quickly.

Helpful

Top reviews from other countries

Translate all reviews to English

EDUARDO GMORA

Excelente producto

Reviewed in Mexico on August 3, 2023

Style: 3/8"D X 350'LVerified Purchase

Protegido y bien enrrollado

Translate review to English

Brenda Barre

Compression

Reviewed in Canada on October 18, 2022

Style: 5/8"D X 150'LVerified Purchase

I went to Home Depot /Lowe’s to see what backer rod they carried and determine what size I might need. Based on the compression if their 1/2” I decided to order 5/8” from Frost King. But there is no comparison. The 1/2” compresses and stays pretty much compressed. The 5/8” from Frost King bounces right back. I obviously don’t need 5/8” so will await the Frost King 1/2”.

Amazon Customer

Time saver

Reviewed in Canada on August 3, 2020

Style: 3/8"D X 350'LVerified Purchase

I used this instead of caulking, quick, easy , great deal.

michael ferguson

Fills gaps really well

Reviewed in Canada on August 26, 2022

Style: 5/8"D X 150'LVerified Purchase

I got this thicker than most as i have 1cm gaps around the soffits and the colour blends in nicely but it is so easy to cut and fill in the spaces.

GIANNI DE ANGELIS

Good value

Reviewed in Canada on October 13, 2020

Style: 1/2"D X 250'LVerified Purchase

Good product does the job and cost effective.

See more reviews

Return this item for free

Choose how often it's delivered

Skip or cancel any time

Image Unavailable

Frost King C21CP-C C23CP-C Caulk Saver Bulk Contractor Pack, 5/8-inch Diameter x 150-feet Long, Grey, 3/8" x diam. x 350 ft

Return this item for free

Return this item for free

Purchase options and add-ons

About this item

Customer ratings by feature

Frequently bought together

Similar items that may deliver to you quickly

Product information

Technical Details

Additional Information

Warranty & Support

Feedback

Videos for this product

fill them cracks

Looking for specific info?

From the manufacturer

Caulk Saver

Product Description

Top Brand: Frost King

Compare with similar items

Customer reviews

Customers say

Reviews with images

Top reviews from the United States

There was a problem filtering reviews right now. Please try again later.

Top reviews from other countries

Amazon Prime includes:

Unlock 5% savings

Choose how often it's delivered

Skip or cancel any time

Unlock 5% savings

Choose how often it's delivered

Skip or cancel any time

Added to cart

Frost King C21CP-C C23CP-C Caulk Saver Bulk Contractor Pack, 5/8-inch Diameter x 150-feet Long, Grey, 3/8" x diam. x 350 ft

Purchase options and add-ons

About this item

Customer ratings by feature

Frequently bought together

Similar items that may deliver to you quickly

Product information

Technical Details

Additional Information

Warranty & Support

Feedback

Where did you see a lower price?

Videos

Videos for this product

fill them cracks

Looking for specific info?

From the manufacturer

Caulk Saver

Product Description

Top Brand: Frost King

Compare with similar items

Customer reviews

Customers say

Reviews with images

Top reviews from the United States

There was a problem filtering reviews right now. Please try again later.

Top reviews from other countries