Model # C21H

Internet #100067266

Store SKU #855668

Store SO SKU #1000667622

Frost King E/O 3/8 in. x 20 ft. Caulk Saver
0077578024288

Frost King

E/O 3/8 in. x 20 ft. Caulk Saver

  • Suitable for use with pavement,cracks,wall joints, foundations
  • Compatible with most caulks and sealants
  • Made of resilient, closed-cell poly foam for durability
$298 /each

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Product Overview

The Thermwell Products 3/8 in. x 20 ft. Caulk Saver helps insulate and cushion while reducing the amount of caulk needed to fill or seal large openings. Use to back fill large gaps before applying caulk (caulk sold separately). Helps insulate and cushion while reducing the amount of caulk needed to fill or seal large openings.

  • Suitable for use with pavement, cracks, wall joints and foundations
  • Compatible with most caulks and sealants
  • Made of resilient, closed-cell poly foam for durability
  • Saves money

Specifications

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Details

Warranty / Certifications

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Customer Questions & Answers

Need to fill 1/4" gap. Will 3/8" provide a tight fit so I can caulk over it?

Need to fill 1/4" gap. Will 3/8" provide a tight fit so I can caulk over it?
Asked by: JaneofallTrades
Yes. You can squeeze in
Answered by: Sebastian
Date published: 2017-03-20

If I use this backer rod for a shower caulking, after caulking cured, water get in behind the cau...

If I use this backer rod for a shower caulking, after caulking cured, water get in behind the caulking and the rod is soaked in constant water, what will happen to the rod? Will this affect the caulking?
Asked by: Ann
I would be more concerned that water is getting beneath the caulk. This could cause destructive water damage. Make sure the backer rod fits tightly in the gap and make doubly sure your caulk completely seals the gap.
Answered by: JaneofallTrades
Date published: 2017-04-25

How compressible; can it be used in a 1/8" control joint?

I need backer rod for a 1/8" saw-cut control joint in a concrete slab. This seems to be the smallest diameter sold by HomeDepot; is it intended to compress into a 1/8" joint?
Asked by: Bob
yes, you can squeeze it in, and shave off the extra.
Answered by: Sebastian
Date published: 2017-02-11

Can this be used on wood?

I need to seal the gaps on a basement staircase where the stair treads and risers aren't completely flush against the wall.
Asked by: newcaulker
Yes
Answered by: Sebastian
Date published: 2017-03-18
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Customer Reviews

E/O 3/8 in. x 20 ft. Caulk Saver is rated 5.0 out of 5 by 7.
Rated 5 out of 5 by from A very good filler for whatever project you have and think of. I have filled the space in between... A very good filler for whatever project you have and think of. I have filled the space in between the counter top and my range oven so that nothing will fall into the slot. It is also good for sealing the space when the window does not close tight and leaks air.
Date published: 2017-01-29
Rated 5 out of 5 by from Had a 1/2" wide gap to fill that was too deep to caulk so I used this caulk saver and it compress... Had a 1/2" wide gap to fill that was too deep to caulk so I used this caulk saver and it compressed enough to tightly fit the gap leaving 1/4" depth to fill with caulk. worked like a charm. Happy with the result. Used some to fill in gap between stove and counter top too.
Date published: 2017-04-25
Rated 5 out of 5 by from Does what it claims. Great product for filling cracks between concrete pads and holding the caulk in place.
Date published: 2014-05-21
Rated 5 out of 5 by from Good buy I purchased this product to fill in larger gaps around my window siding before re-caulking and worked great and was easy to use. I just wish it was stocked at the store.
Date published: 2014-12-17
Rated 5 out of 5 by from Great for concrete joint resealing the product is as advertised and is very easy to install. I used it in my driveway joints with flexible caulk and was very pleased with the result
Date published: 2015-05-26
Rated 5 out of 5 by from Caulk saver This stuff rocks ice. It is great for making stefans. It does everything you need it to do.
Date published: 2009-12-28
Rated 5 out of 5 by from Works as described. Works as described, don't try to do the job with out this backer.
Date published: 2015-12-08
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