Sylodyn® ND
Sylodyn ND is a closed-cell polyurethane elastomer from Getzner Werkstoffe used for vibration isolation and impact noise control in building structures and machinery. Sitting in the mid-range of the standard Sylodyn grades, it carries static loads up to 0.35 N/mm2 and is well suited to floating floors, structural bearings, wall and ceiling decoupling, and machinery pads under moderate compressive loads.
Specifications
- Material: Closed-cell PU elastomer (polyurethane)
- Colour: Green
- Static range of use: Up to 0.35 N/mm2 (approx. 10% deformation at shape factor 3)
- Dynamic range of use: Up to 0.50 N/mm2 (approx. 17% deformation)
- Load peaks (occasional, brief): Up to 4.2 N/mm2 (approx. 50% deformation)
- Static modulus of elasticity: 3.01 N/mm2 at specific load of 0.35 N/mm2
- Dynamic modulus of elasticity: 3.42 N/mm2 at specific load of 0.35 N/mm2, 10 Hz
- Static shear modulus: 0.38 N/mm2 at pretension of 0.35 N/mm2
- Dynamic shear modulus: 0.55 N/mm2 at pretension of 0.35 N/mm2, 10 Hz
- Mechanical loss factor: 0.08
- Rebound resilience: 70% (EN ISO 8307)
- Compression set: Less than 5% (EN ISO 1856, 50% deformation, 23 degrees C, 72 h)
- Compression hardness: 0.34 N/mm2 at 10% linear compression, 3rd load cycle
- Coefficient of friction on steel: 0.7 (dry, static)
- Coefficient of friction on concrete: 0.7 (dry, static)
- Coefficient of friction on wood: 0.5 (dry, static)
- Thermal conductivity: 0.11 W/(mK)
- Temperature range: -30 degrees C to 70 degrees C
- Flammability: Class E (EN ISO 11925-2, EN 13501-1)
- Standard sheet dimensions: Roll 1.5 m wide x 5.0 m long; strip up to 1.5 m wide x 5.0 m long; thickness 12.5 mm or 25 mm
Applications
Sylodyn ND is used for impact noise insulation in floating floor assemblies, acoustic decoupling between floors, walls, and ceilings, bearing pads under moderate-load machinery, vibration isolation of technical equipment, and structural bearings in buildings where heavier loads preclude the softer NB and NC grades. The closed-cell structure prevents water absorption. Punched and moulded parts are available on request.
Standards and compliance
Flammability classified to class E per EN ISO 11925-2 and EN 13501-1. Compression set tested per EN ISO 1856. Load deflection curves recorded per ISO 844. Material properties are determinable via the Getzner FreqCalc online calculation program (registration required).
Frequently asked questions
How does Sylodyn ND compare to NC and NE?
ND carries a higher static load than NC (0.35 N/mm2 versus 0.15 N/mm2) with greater stiffness, making it the appropriate choice for heavier floor or bearing loads. NE carries still higher loads, so ND occupies the middle of the standard range.
What sizes are available?
Standard supply is as rolls (1.5 m wide by 5.0 m long) or strips, in thicknesses of 12.5 mm and 25 mm. Custom punched and moulded parts are available on request.
Is Sylodyn ND water resistant?
Yes. The closed-cell pore structure prevents water absorption, making it suitable for wet-area, bathroom, plant room, and below-grade applications.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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FAQs
What is your return policy?
All refunds and returns are determined by the manufacturer's terms of sale. Change-of-mind refunds are not accepted, but all valid warranty claims will be managed by AKA Acoustics in compliance with consumer law.
How long will it take to receive my order?
Freight lead times will be provided upon order confirmation. Standard items typically ship within 4–6 weeks, while custom orders may take 6–12 weeks.
Is my payment information secure?
Yes, all payments are securely processed through Stripe and are protected under their Terms of Service. AKA Acoustics do not store any payment information ourselves.
How are freight costs calculated?
Freight costs are determined at the time of quotation to ensure accurate pricing based on your specific order. For any questions, please email sales@akaacoustics.com
How can I contact support?
For account inquiries, email accounts@akaacoustics.com. For order support, email sales@akaacoustics.com.