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2-1/8" Pipe (O.D.) x 3/8" Wall Insul-Lock Pipe Insulation, 6'

Brand:
K-Flex
SKU:
6RXL038218
Rating:
(74)
Q&A:
(12)
2-1/8" Pipe (O.D.) x 3/8" Wall Insul-Lock Pipe Insulation, 6'
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$12.95 each
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$154.83 box of 13
$11.91 each
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Product Highlights

Product Highlight: Installation Type
Slit
Product Highlight: Length (Feet)
6' Length
Product Highlight: Color
Black
Product Highlight: Wall Thickness
3/8"

Description

**Image may not depict actual product.**

NOTE: For more detailed product information, see the "Submittal Sheet" document.

Overview:

K-FLEX® INSUL-LOCK® DS (DoubleSeal) is a flexible closed-cell elastomeric insulation tube product used to conserve energy and prevent condensation on piping applications. It is pre-slit with a factory-applied pressure sensitive modified-acrylic adhesive with scrim reinforcement on the seam surface and a flexible PVC overlap tape with acrylic adhesive for doubled seam security. The system reduces installation time and costs, and ensures a strong, durable seal.

The product's closed-cell structure creates exceptional thermal properties (k-value of 0.245 at 75°F and wvt of 0.03 perm-in) that protect against moisture penetration in applications within a -40°F to +220°F temperature range.

K-FLEX® INSUL-LOCK® DS is widely used for its cold weather flexibility, durable skin surface, exacting manufacturing tolerances and lasting performance. It is available in 6’ lengths in wall thicknesses ranging from 3/8”* to 2”.

K-FLEX® INSUL-LOCK® DS is non-porous, non-fibrous and resists mold, fungal and bacterial growth. For added protection, it is protected with an EPA-approved antimicrobial agent.

K-FLEX® INSUL-LOCK® DS is GREENGUARD® certified under the Children and Schools classification, is approved through supervision by the Factory Mutual Research Corporation, and is 25/50-rated when tested to ASTM E 84 standards.

Applications:
  • Systems
    • Air conditioning
    • Cold water
    • Chilled water
    • Refrigeration
    • Duct wrap
    • Hot water
  • Projects
    • Commercial/multi-family housing
    • Hospitals
    • Hotels
    • Schools

Specs

Installation Type:

Slit

Length (Feet):

6'

Application:

2" Pipe

Color:

Black

Wall Thickness:

3/8"

R-Value:

2.3

Operating Temp Range:

-40° to 200°F

Density:

3-6 PCF

Water Absorption:

0% by volume

Chemical/Solvent Resistance:

Good

Mildew Resistance/Air Erosion:

Pass

Ozone Resistance:

Pass

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Product Reviews

4.61 out of 74 reviews
93% would recommend this product
4.61
out of 74 Reviews
93% would recommend this product
WRITE A REVIEW
5 star
76%
4 star
16%
3 star
3%
2 star
4%
1 star
1%
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Most Liked Positive Review

Perfect for the job

The insulation work like a champ, box had great instruction on how to use and cut the product for all angles and pipe connections.
VS

Most Liked Negative Review

Adhesive failed to hold within 24 hours

The 1-1/2" pipe insulation matched the 1-1/2" pex pipe dimensions on the heating pipes in the crawl space, and the adhesive tape on the insulation edges made the initial installation quick and easy. However, the adhesive joint failed to stay together within 24 hours with long gaps opening up to 2" wide. I had to install duct tape along most of the seams to keep the pipe insulation together. It took too much effort to install both insulation and then duct tape to consider using this product again.
Showing 1-10 of 74 reviews

Great product, Service and Shipping 5 *****

I needed to replace the liquid line insulation on my a/c here in Florida. Ours was breaking down after about 7 years and this was the right product at the right place along with a fair price. I'd like to thank them for the quick shipping as well. I'll be back when I need one of your products.
DIY Guy
Florida
12 months ago
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I would buy this product again.

I used this product to insulate a riding lawn mower fuel line from engine heat, which was causing vapor lock and stopping the engine until it cooled.
Sonny
Fannin County, Texas
1 years ago
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Great product

Great product
Mick
TN
1 years ago
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I would definitely recommend this product

Fast and easy installation
Todd
Indianapolis
1 years ago
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Good product

Easy installation
Monty
Indy
1 years ago
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Easy Install / Good Quality Insulation

I used this Pipe Insulation for our hydronic baseboard heating system. Insulation is good/better quality and very easy to work with. Comes with adhesive that instantly seals in place. Used in both interior and outside crawlspace areas for protection and efficiency.
Dan
Gettysburg, PA 17325
1 years ago
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Product was OK but packaging was horrible

I did not care for the protective film covering adhesive strips on insulation. It was cheap and did not peel off in one piece. The packaging of the insulation add tremendous time to the installation. The insulation comes from the manufacture in long boxes to keep the product straight but when shipped from Supply House warehouse, it was rolled into balls and shoved into a smaller, rectangular box; which made it very difficult to work with. The baseboard element that was also ordered was the same length and the insulation SHOULD have been shipped in the same straight boxing. Very disappointing and frustrating when loosing money
jjplumber
New Jersey
1 years ago
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Supple product, dynamic adhesives!

This is the insulation you've been looking for. It's very supple and easy to form, it will stretch and the glue will hold! Worth every cent.
Oldad
Middle of the mitten, Michigan
2 years ago
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Flexible, Strong Adhive, but didn't have the flap shown

This is a high-quality flexible pipe insulation. The adhesive that bonds the insulation together is stronger than the foam so no "second chances" if you don't have the surfaces properly aligned. As long as you remove the adhesive strips when you have the sides aligned it works well. My only complaint is that the picture shows a fold-over flap on the surface of the insulation, but the insulation I received did not have the flap as shown in the picture. No time to investigate or return so I'm not positive if the 5/8 OD, 3/8 Wall insulation should have the flap or if I received the wrong product.
Alrec01
SE Michigan
2 years ago
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I guess I should have read the description more closely.

The picture shows this to be the overlap insulation when in fact it's the double adhesive. I've found I have to tape the joint closed since on 1 1/4" copper it is VERY tight and the joint keeps opening up.
Bub
Georgetown SC
2 years ago
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Product Q&A

12 Questions
12 Questions
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Q: Is this product uv rated? I am looking for insulation for suction line on a/c condenser.

Asked by Bucko 10 years ago

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Verified Author and ReplyVerified Reply- SupplyHouse Staff

According to K-Flex, For moderate UV exposure, no additional protective coating needed. However, for severe UV exposure (rooftop applications) or where optimum performance is required, 374 Protective Coating or approved jacketing or cladding should be used.

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Q: Says 1/2 pipe O.D. in title, but the Application: say 3/8" Pipe. So is this for 3/8 or 1/2 copper pipe?

Asked by M 11 years ago

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Verified Author and ReplyVerified Reply- SupplyHouse Staff

So this insulation is for use on pipe that has 1/2" OD (or 3/8" nominal ID) sizing. So that is why both sizes are listed, to clarify which type of pipe it would be compatible with.

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Q: Can this be used where the tubing inside is metal braided because we have to radius this tube around a tank that is 11' in diameter?

Asked by Jerry 11 years ago

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Verified Author and ReplyVerified Reply- Supplyhouse Staff

yes it can

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Q: Could the pipe insulation be painted

Asked by Dublin38 12 years ago

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Verified Author and ReplyVerified Reply- SupplyHouse Staff

No, the manufacturer does not approve painting the pipe insulation. Doing so will void the warranty.

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Q: I have a 1 1/2 sump pump line that extends 18 inches past the exterior wall. I live in Wisconsin and was wondering if this will help the 18 inch of pipe sticking out the exterior wall from freezing. The water from the sump pump is then piped underground to a drainage ditch. The underground pipe never seems to freeze, but that 18 inches of pipe seems to. Can you help??

Asked by HD 12 years ago

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Verified Author and ReplyVerified Reply- SupplyHouse Staff

Yes, adding insulation to the exposed 18" of pipe will help reduce the risk of freezing. This product has moderate UV resistance and can be used in outdoor applications (except roofs).

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Q: I read and my supplier says that the pre-glue strip foam pipe insulation cannot be used on PEX. What makes some insulation PEX ready and some not? What makes the Insul-Lock PEX compatible?

Asked by James 13 years ago

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There's no thermal reason that it won't work, and the diameters are about the same, but there's no effective way to install/hang/support it and have it look decent.  As well, PEX expands and contracts which, depending on how the insulation is installed and supported, may cause the glue seals the separate over time. If allowance were made for expansion, the foam insul could be used on stick (non-flexible)PEX, but that's typically only 1-inch and larger pipe.

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Q: Hi, will this product fit 1 1/4" cast iron pipes? thanks

Asked by travis 14 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

It will fit any pipe with a 1-3/8" outside diameter.

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-

Travis, I'm assuming you mean 1-1/4 "black iron" pipe instead of "cast iron". In which case a 1-1/4" black iron pipe has an outside diameter of 1.66", therefore, this choice of insulation will not work. PAT DIVITO, PE l FLUOR l Mgr Electrical Engineering, Data Center and Integrated Systems Support l Facility Management l ****@***.*** l O ***.****l M***.**** From:

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Q: I am puting in a hot watter circulaing reiculating system for my new tankless system using 3/4 pex . I want to insulate the hot water piping . all is installed in basemnt .Don't want to loose heat in circulting lines.What schould I use for pipe insulation?

Asked by Gary 14 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

This is the proper insulation for 3/4" PEX that we carry. We also sell pre-insulated AquaPEX tubing from Uponor.

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-

First, remember pex needs to be supported. Plan the support system while planning the insulation of the line. Doubling the R-value does not mean you cut the heat loss in half. However added insulation will always reduce the loss. The key is that there is a point of diminishing returns. If you can afford it and want to reduce as much heat loss as possible - double up on the insulation. The key is that corners, bends, connectors should also be insulated and sealed. I my recirc lines I can feel and measure some heat loss through the insulation even though I used a ½ wall insulation. I will probably go back and add a second thicker (cheaper) layer of pipe insulation on top of what I had previously done. You need to meet the minimal codes in your area. After that it comes down to how much you are willing to spend and if you are expecting a fast or slow return on your investment.

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Q: I have pex tubing in my attic that sometimes freezes in the winter. Can this be used to insulate pex?

Asked by buddha 15 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

This insulation can be used with PEX. PEX has the same outside diameter as copper and CPVC. Outside diameter will always be 1/8" larger than the listed size of the tubing.

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Q: Do you carry any pipe insullation for 3/4" AC copper pipe?

Asked by GARY 16 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

Yes, we do. Here is a link to the product: http://www.pexsupply.com/K-Flex-6RXL038078-7-8-Pipe-OD-x-3-8-Wall-Insul-Lock-Pipe-Insulation-6

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