Acousti-Fill Underlayment

Lightweight, trowel-applied flooring underlayment for absorbing sound.

Dex-O-Tex Acousti-Fill is a lightweight, trowel-applied flooring underlayment designed to absorb sound and reduce sound transmission. Its latex composition contains a sound absorptive, vibration-damping aggregate, which markedly reduces Impact Noise Radiation (INR) and improves the Sound Transmission Classification (STC).

Acousti-Fill can be installed beneath a variety of floor finishes, including carpet, resilient tile, ceramic tile. It can also be used to absorb sound on promenade decking for apartment or condo complexes or in mechanical equipment rooms to dampen intense sound vibrations.


  • Reduces Impact Noise Radiation (INR) and improves Sound Transmission Classification (STC)
  • Monolithic
  • Light weight
  • Quick installation over a wide range of surfaces
  • Green technology
  • No toxic odors during installation
  • Installed only by professional, factory-trained Dex-O-Tex contractors

Technical Info

  • Compressive Strength ASTM C109 (2″X2″ cube) – 250 psi
  • Surface Hardness ASTM D2240 Durometer
    • Scale “A” – 75
    • Scale “D” – 20
  • Indentation Characteristics (Impacted Load) MIL-D-3134, Para. 4.7.3. (2 lb. ball) – No cracking or loss of bond indentation 0.047″
  • Adhesion MIL-PRF-3135, Para 4.5.12 (Shear from steel plate) – 125 psi
  • Resistance to Elevated Temperature – No flow or slip MIL-PRF-3135 Para 4.5.5. – Complies
  • Density Weight per Cu. Ft – 60 lbs
  • Weight pounds per sq. ft. at 1″ thickness – 5 lbs.
  • Impact Noise Radiation (INR) At 1″ Thickness ASTM E492 – INR 0
  • Sound Transmission Classification (STC) At 1″ Thickness ASTM E413-04 – STC 51
  • At 1/2″ Thickness over 6″ Thick concrete – STC 49
  • Yield – 13″ feet squared at 1″ thickness

Please see product safety data sheets.


More in Overhead, Patching, and Underlayment Systems

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Contex Admixture
G-26 Underlayment
High Strength Mortar

Related Projects

See how Dex-O-Tex contractors use this product in the field.

clean commercial kitchen in a restaurant

Food & Beverage: Maintaining Your Commercial Kitchen

Maintaining a hygienic commercial kitchen is one of the biggest challenges of running a busy restaurant. As a business owner, manager or chef, it is […]

Maintaining a hygienic commercial kitchen is one of the biggest challenges of running a busy restaurant. As a business owner, manager or chef, it is important to have a system in place as well as an outline of how to keep your kitchen in top shape. When you implement a system for your staff to follow, you educate them of good practices that prevent common hazards such as slips and fires. It is important to conduct regular inspections to ensure that your kitchen is safe for your employees and customers. This way, you prevent unexpected breakdowns that can affect your kitchen’s productivity.

Schedule professional maintenance

To keep your kitchen running smoothly, conduct regular preventive maintenance. Make sure your equipment is consistently performing to save you time and money on repairs. Replace broken and worn out parts to keep them functioning for many years. Should repairs be required, you can call in a professional to troubleshoot for you.

Professionals will provide your business with all the reliable repairs and replacements required for your team to prepare a great meal for your customers. They will also assess your staff’s activities, provide safety regulations, identify immediate and potential hazards, respond to unsafe situations and look for ways to improve your current system.

Ensure sanitation

Cleanliness is the key to a successful restaurant or hotel. With regular cleaning, you ensure that the food coming out is safe for your customers to eat. There are some cleaning jobs that can be accomplished monthly, while there are others that must be done regularly.

Food preparation takes place in the kitchen, so you can expect your countertops and hard surfaces to be a breeding ground for bacteria. These should be wiped clean a couple of times a day to ensure that the food you will serve is safe for consumption. Appliances and equipment such as ovens, toasters, fryers, grills and coffee makers should be deep cleaned weekly so they stay in excellent condition. Your ceiling, floor and walls should also be wiped daily to remove grease and food particles. Wash out your exhaust vents and hoods every few months to remove grease and grime. Finally, do an extensive cleaning of your racks, shelves and cabinets every six months.

Inspect your flooring

wide shot of a commercial kitchen

Every day, your kitchen flooring is exposed to heavy industrial cooking equipment, extreme temperatures and spills. With overall constant use, your surface will require annual floor preservation. To maintain your flooring, ensure a slip-resistant surface that won’t surrender to the daily application of harsh cleaning agents. Waterproof epoxy floor coating will help protect your concrete floor against liquid damage, saving you expensive routine maintenance costs. This resinous finish provides a hardwearing, tough and scratch-resistant surface that performs well in areas, like walk-in freezers, which are subject to water immersion.

Dex-O-Tex offers a full line of floor, wall and waterproofing systems for commercial, industrial and residential spaces in the US. We provide our solutions to schools, laboratories, athletic facilities, restaurants, hospitals and many other environments. If you want to know more about the products and services we offer, visit our website at

Find the Right Solutions for Your Project Today

Let Dex-O-Tex share over 80 years of expertise in advanced flooring, coating, waterproofing, and more. Complete your construction project proficiently with the use of superior solutions.