Regupol TruBond 45-101 (4 Gallon) Acoustic Underlayment Adhesive
Description
Regupol TruBond 45-101 (4 Gallon) is the manufacturer-recommended adhesive for bonding Regupol Sonus Core acoustic underlayment to subfloors before installing ceramic tile, natural stone, or hardwood. It is a specialty underlayment adhesive — not a finished-flooring adhesive — engineered to lock the sound-control layer to the substrate while allowing it to perform as a decoupling and noise-reduction membrane.
This universal, all-purpose adhesive delivers excellent moisture resistance, freeze-thaw stability, and a strong yet elastic bond, making it ideal for residential and light-commercial sound-control installations beneath tile and stone floors. It contains no water and requires no mixing or priming.
Important: TruBond 45-101 is used only to bond Regupol Sonus acoustic underlayment to approved subfloors. It must never be used to install finished flooring such as rubber flooring, vinyl, LVT, wood, or sports flooring.
Approved Substrates
- Concrete (minimum 28 days old)
- Cement terrazzo
- Exterior-grade plywood and approved wood subfloors
- Ceramic tile
- Cement-based self-levelers and patching compounds
- Primed gypsum underlayments meeting ASTM F2419
- Radiant-heated subfloors
Key Benefits
- Less than 60 g/L VOC (low emissions)
- Easy to trowel with excellent workability
- Fast curing
- Strong yet elastic bond
- Lightweight
- Contains no water
- No mixing or priming required
Coverage & Trowel
- Trowel: 3/32 in x 3/32 in x 3/32 in V-notch
- Coverage: 140 to 150 sq ft per gallon
- 4-gallon pail covers: approximately 560 to 600 sq ft
Traffic & Cure
- Light foot traffic after 12 hours
- Heavy traffic after 24 hours
Product Size
- 4-Gallon Pail