Product Overview
Soundac® PU-D20 is a two-component polyurethane compound designed for constrained layer applications on steel and aluminum, particularly in horizontal objects and floors. It is formulated to significantly reduce noise generated by structural vibrations by providing a high loss factor over a wide temperature and frequency range. It can be easily combined with Soundac® AS sound-absorbing foams.

Applications
The product is used for anti-drumming in horizontal floors and reducing vibration levels in steel structures and machinery.

Stock and Availability
Soundac® PU-D20 is always in stock. Contact the company for quotations and availability.

Physical Properties

• Basic color: Brownish
• Density: 1600 kg/m³
• Solid content: 100%
• Solvent: Solvent-free
• Operating temperature: -20°C to +80°C
• Application temperature: +15°C to +23°C (max. +25°C)
• Pot life (unopened): 12 months at +15°C to +23°C
• Pot life (opened): Approximately 30 minutes
• Minimum storage temperature: 0°C
• Burn rate: Not inflammable
• Drying time at +20°C: 8 hours, with maximum acoustical performance after 5 days

Converting and Application
Surface pre-treatment is required: aluminum and stainless steel should be painted with wash primer, while steel should be sandblasted or painted. Components A and B must be thoroughly mixed before use, with a pot life of about 30 minutes after mixing. The mixture should be poured to the specified thickness, and the constraining metal sheet laid down in the wet layer.

Safety Precautions
The B component contains isocyanides of the MDI type. Protective gloves and goggles are necessary. In case of eye contact, flush with water and seek medical attention. Skin contact should be cleaned with soap and water or alcohol. Ensure good ventilation in working areas.

Disclaimer
This information is based on general experience and provided in good faith. However, no warranty is given or implied due to factors outside the company's control that may affect the product.