Update: Add a product to your cart to see accurate delivery dates for your pincode.

Shopping cart

NanKarrow IsoTube™ 100 ft Soundproofing Closed Cell Perimeter Sealing Rod

(1 customer review)
In stock
In stock
NanKarrow IsoTube™ Soundproofing Closed Cell Corner Sealing Rod Features:
  • Designed In Russia
  • Fully CNC Laser Cut, With No Imperfections
  • Closed Cell Polyethylene Foam
  • Nonimpregnated, nonstaining, and nonbleeding
  • Inert and does not adhere to sealants
  • Colour : White

2,880.003,360.00 incl GST

Bulk/Project Enquiry

Product Description

Use the NanKarrow IsoTube™ Soundproofing Closed Cell Corner Sealing Rod to help fill gaps and openings in cracks, wall joints, ceiling joints, floor joints, foundations, and more. IsoTube™ helps cushion and insulate and helps prevent 3-point bonding.

What are Closed Cell Perimeter Sealing Rods?

Closed cell backer rods are designed to limit the depth of sealants, help the sealant assume an hourglass shape (which prolongs sealant life), and serve as a bond breaker to prevent bottom-side adhesion. IsoTube™ does not stain sealants, and is chemically inert. It is non-gassing, non-exuding, and virtually dust-free. Due to physical and chemical inert nature, IsoTube™ is compatible with virtually all known cold sealants, including self-leveling sealants – butyl, polysulfide, acrylic polyurethane, silicone, POP, and most other cold-applied sealants

Contemporary foam sealants are loaded with feature-rich attributes. They seal quickly, with a cell type that prevents fluid ingress. Temperature control and vibration management strategies are readily formed when the foam material is intelligently sourced and expertly installed. Think about it, these adhesives and binding materials bond efficiently, so what else is there to think about? Well, what about a sealing scenario where part of the backing surface is missing?

Backing Rods Fill the Void

Like a gap-filling backbone, the backing rods occupy any and all spatial voids. Picture a series of garages behind a busy street. Water seepage problems are taking place between two units because of a crack in the wall. The obvious solution here is to close this gap at its source. Unfortunately, the gap is several centimetres wide. On the bright side, there’s a sealant that’s up to the job, but it’s not going to properly fill the gap. That’s a job for the backing rods. Properly inserted, the pliable strip fills that linearly stretching gap. Then, once the void is occupied, the foam sealant has a backing surface it can be pushed against. That final joint is strong and entirely weatherproof.

Creating a Three-Walled Joint

If the backing rod isn’t fitted, the sealing material is compressed between two walls, the chasm of the joint, as it were. The third surface is missing. Arguably, the compressed caulking will expand to fill the void. However, it has no third wall to occupy. Because of that absent backing surface, the foam sealant doesn’t have a ‘backbone,’ the one we mentioned a moment ago. It is absolutely imperative that the three-way surface joint forms correctly, so that third surface, the one created by the backing rod, must be installed before the foam sealant is applied. Otherwise, application uniformity cannot be correctly established. Keep these facts in mind while installing this material stripping as an expansion joint before an amorphous sealant is applied.

NanKarrow IsoTube™ Soundproofing Closed Cell Corner Sealing Rod Applications:

  • Fills gaps and openings in cracks, wall joints, ceiling joints, floor joints, foundations, floor tiles, window frames, door frames, and more
  • Non-absorbent, closed-cell polyethylene material
  • Twist multiple strands together to fill large cracks, gaps
  • Can be used in expansion joints
  • Provides a sound surface for filling gaps with silicone and other cold applied sealants.

It can be used in various places like Hotels, Residential Areas, Auditoriums, Recording Studios, Music Rooms, Home Theaters, Rehearsal Rooms, Dubbing Rooms, Ship & Yacht Buildings, Generator Rooms, Schools & Universities, Conference Rooms & Office Cabins, Commercial Places, etc.

NanKarrow IsoTube™ Soundproofing Closed Cell Corner Sealing Rod Features:

  • For Use with Cold Applied Sealants
  • Closed Cell Polyethylene Foam
  • Nonimpregnated, nonstaining, and nonbleeding
  • Inert and does not adhere to sealants
  • Colour : White
  • Length: 100 feet


Installation Guidelines:

Step 1: Install backing rod

Step 2:  Seal with silicone or other cold applied sealants


Weight 2 kg



Auditorium, Home Theater, Industrial, Nightclubs, Offices & Conference, Recording Studios




15 mm, 25 mm

Share your thoughts!

5 out of 5 stars

1 review

Let us know what you think...

What others are saying

  1. Dedicated and Helpful Team

    Bharat Pal

    This white color sealing rod with 15mm thickness did the work exactly as advertised. Thank you everyone for helping me out.

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...



Continue as a Guest

Our head-office is in Mumbai; however, we don’t have a showroom or physical stores. We're an online company - we distribute our products online all over India via a distributed warehousing system - we have warehouses in 8 locations. Since our products are technical and used for solving specific acoustic problems, they do not attract walk-in customers. If you want to buy our products, just place your order online or reach out to us via the contact forms.
We do not offer Cash on Delivery. Our products are extremely large and bulky - you can fit a human being into most of our boxes. As a result, one of the highest costs in running this company is the money paid to courier companies like Fedex, XPressBees, etc, which runs into crores of rupees annually. If we allowed COD and the buyer changes their mind and refuses to pay during delivery, we incur double shipping costs (a) for sending the product to the buyer + (b) for shipping the product back to our warehouses. In some cases, this may be more than the value of the product itself. For this reason, we find it impossible to offer Cash on Delivery.
We follow maximum transparency in showing you actual delivery dates at a product level. The exact delivery dates are visible on each product page, cart page, checkout page, as well as your order confirmation emails. Once your order is shipped, regular shipping updates are provided via SMS.
We supply products only. We're an ecommerce company and our focus is on importing, distributing, manufacturing, and supplying a wide range of technical isolation & acoustic products across India. For installation you can engage local contractors / carpenters. Please contact us if you need specific information on installing any product in our catalog.
We accept returns upto 30 days from the date of receipt of product. If you need to return a product, just contact your sales representative and we will arrange a reverse pickup via Fedex. Your refund will be processed within 3 days after we get it back. We charge a 15% fee for restocking the product so this is subtracted from your refund. This is waived off if you have not removed a product from it's original packing and are returning it unused.
Your order could be in several spots... our warehouse, our custom-shop manufacturing units, anticipating dispatch, with the courier on its way, or conveyed. The principal thing to check is have you had your dispatch email? If yes, at that point it's en route. You can track your order by clicking your tracking link from that email. In the event that you haven't got your dispatch email within a week of placing your order, please do contact us.
ONLINE PAYMENTS: Pay us via Netbanking, credit cards, debit cards, wallets, or UPI via our online payment gateway. Over 95% of our customers use this option as it is fast and secure. CHEQUE/DD/DIRECT CASH DEPOSIT: You can deposit a cheque OR Demand Draft OR do a cash deposit into any of our Bank's ATM dropbox/branch near you. The cheque should be in favour of AURAL EXCHANGE and you must mention our account number behind the cheque. You can also mail us At-Par Cheques and Demand Drafts. Please do not mail us cheques unless they are "At Par" cheques. Company Name : Aural Exchange Bank Name : HDFC Bank Account No : 50200021982013 Branch : Sahar Road Branch ( Vile Parle East) IFSC Code : HDFC0000668
Our limited warranty covers any manufacturing defects in materials and workmanship (excluding normal wear and tear) for the products listed below that are purchased in India. We offer 1-5 year warranties depending on the brand. You can view warranty information on the individual product pages. You are solely responsible for all shipping and insurance costs for returning the product to Aural Exchange, and you will not be reimbursed or compensated for any loss or damage incurred during return shipping. Aural Exchange will at its sole discretion repair or replace the product. Should the product no longer be available, we reserve the right to exchange this with a product of similar performance and value. Due to different dye lots, Aural Exchange cannot guarantee exact colour match. This Warranty shall solely extend to the original owner and is limited to manufacturing defects and excludes damage due to improper installation, freight handling, wear and tear, abuse, misuse, misapplication, colour fading or deterioration due to prolonged exposure to ultra violet light, smoke, humidity, water exposure, or other environmental factors. It is understood that the use and suitability of the product is entirely the responsibility of the buyer or specifying engineer and as such, these parties agree to hold Aural Exchange, or its associated company, and/or officers, harmless from any responsibility whatsoever other than what is clearly outlined in this warranty.
This warranty is void if the product is found to have been tampered with or misused by the purchaser, and shall not apply if the product has been physically damaged intentionally or due to accident and/or neglect, including burns, cuts, water damage, fungus, mold, stains, or is otherwise abnormally soiled or unsanitary. Any problems that are caused by abuse, misuse, or weather-related destruction are not covered. Products designed to customer supplied specifications and/or using or including a) customer supplied materials or b) non-standard production techniques or materials are not covered. Also, consequential and incidental damages are not recoverable under this warranty. Additionally, the products listed below are not covered under this warranty: 1. Accessories & Enhancements 2. Installation Materials 3. Product Samples To minimise colour-fading of acoustic foam products due to exposure to oxygen and ultra violate light, carbon is employed during the colouring process. This does not guarantee the colour fastness of the foam component and you should expect the appearance to change over time. Colour fastness is not covered under the Warranty. This warranty does not cover damage to furniture or equipment caused by contact with or destabilization of the foam components or adhesives and hardware used for installation. Care should be taken when placing the product on finished wood surfaces or other surfaces to ensure there will not be a chemical interaction between the surface finish and the foam component.