Rubber Joist Isolators

Rubber Joist Isolators
EPDM U-Boats for Joists EPDM U-Boats for Joists U-Boats Applied on Joists U-Boats Applied on Joists

High Quality EPDM Rubber Joist Isolators and Floor Floaters made in the USA. Support and acoustically isolate floor framing members, to lessen the sound waves passing from one side of the structure to the other. U Boats are sized to fit standard 2" thick joists.


Price: $3.99
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Note: you must order at least 10 items
Made in USA
Fast turnaround
SKU Z1020R
Quantity Price
100-499 Items $3.09
500+ Items $2.49

EPDM Rubber U-Boat Floor Floaters (otherwise known as Damping Shoes or C-Channel Suspension Isolators) support and acoustically isolate floor framing members, to lessen the sound waves passing from one side of the structure to the other. The U-Boats are extruded from EPDM Rubber that is formulated to reduce or eliminate vibrations.

Dimensions / Specifics:

U-Boats are shaped to accommodate standard joist dimensions, and molded to fit around the edge of any 2  by X joist.

  • Width: 1.5” (38.1mm)
  • Height: 2.125” (54.0mm)
  • Length: 2” (50.08mm)
  • Thickness: Sides- .313” (7.9mm); Base- .5” (12.7mm)
  • Color: Black
  • High Quality: Made in the HSA

What is EPDM?

EPDM Rubber (Ethylene-Propylene-Diene-Monomer) is comparable to Neoprene Rubber, however it surpasses it in performance and is a more eco-friendly option. Specifically, it has outstanding resistance to abrasion, hydraulic fluids, alkalis, heat, ozone, and weather.

How Many Do I Need?

  • If Joist Spacing is 24” OC, U Boats should be installed at a minimum of 16” OC along the joist and should not exceed 24” OC.
  • If Joist Spacing is between 12” and 16” OC, U Boats should be installed at a minimum of 16” OC along the joist and should not exceed 32” OC.
  • TIP: If Joist Spacing is 16” OC with U Boats installed at 16” OC on joist, multiply the total square footage of your room by 2/3 to calculate approximate U Boats needed.

To add additional soundproofing properties to your floor, Insulation Products from our Acoustic Insulation Line is recommended. For expert soundproofing advice, please contact us at 845-388-1200 our trained staff is standing by to help you plan your soundproofing project.

Product Data

Click to Print Product Data Sheet.

Product Specs:

Product Specs of EPDM Rubber U-Boat Floor Floaters 


Sample Application:

Sample Application of EPDM Rubber U-Boat Floor Floaters

Shipping & Returns

Shipping and Return information is specific to this product page only (not for other products on our site).

  • Shipping:
    • Product is in stock and ships within 24 HOURS!
    • FREE SHIPPING on orders over $75.00. There will be a flat $14.99 shipping and handling fee on orders under $75.00. - Applies to orders shipped within the USA (excluding Alaska and Hawaii).
    • Ships FedEx Ground.
    • Overnight and Express Shipping is available, please contact us at 845-388-1200.
    • Shipping time varies, see Shipping Information page.
  • Returns:
    • Product can be returned up to 60 days if in brand new condition.
    • A $10 fee will be charged to cover our original shipping cost.
    • Please call or email us to receive an RMA number before returning. No returns will be processed without an RMA number.
    • Return address will be provided when return is approved.
    • If you are shipping via USPS (not recommended) do NOT require signature as we will not be able to pick up your package from local post office facility.
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Product reviews are only available to verified buyers of this product. To leave a review, please refer to the product review email we sent you.
  • Effective (1)
  • Bad Quality Control (1)
  • Expensive (1)
best uses

Reviewed by 1 customers

Displaying reviews 1-1

By mercichao

from San Jose, CA

Verified buyer
High defect rate
  • Effective
  • Bad Quality Control
  • Expensive
best uses
Comments about Rubber Joist Isolators:
I have bought 55 pieces (57 received) and 10 of them are obviously stiff, others are soft and bouncy. I'm not sure whether the defect rate is 17.5% or 82.5%, and it also costs more than other branded products like Acoustics U-Boat and RSIC-Joist Isolator.
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Customers Questions and Answers

1) Ryan: To sound proof ceiling bulkheads from the floor above could these U-boats be installed to isolate bulkhead framing and drywall from ceiling floor joists or would framing the bulkheads normally then decoupling the drywall with sound isolation clips be better?

Trademark Soundproofing Reply: Hi Ryan. The 2nd way is more practical. Very important to keep in mind that sound getting into soffits can leak down the walls they are attached too.