Sylomer® SR 28
Sylomer SR 28 is a soft mixed-cell polyurethane elastomer from Getzner Werkstoffe for vibration isolation under lightly loaded structures and equipment. Colour-coded blue, it is one of the softer grades in the standard Sylomer range and is selected where bearing pressures are low and a low system natural frequency is required for effective isolation.
Specifications
- Material: mixed-cell PU elastomer (polyurethane)
- Colour: blue
- Reference specific load: 0.028 N/mm2
- Static range of use: up to 0.028 N/mm2 (approx. 7% deformation)
- Dynamic range of use: up to 0.037 N/mm2 (approx. 20% deformation)
- Load peaks (occasional, brief): up to 1.0 N/mm2 (approx. 75% deformation)
- Static modulus of elasticity: 0.19 N/mm2 at 0.028 N/mm2 specific load
- Dynamic modulus of elasticity: 0.42 N/mm2 at 0.028 N/mm2, 10 Hz
- Static shear modulus: 0.07 N/mm2 at pretension of 0.028 N/mm2
- Dynamic shear modulus: 0.14 N/mm2 at pretension of 0.028 N/mm2, 10 Hz
- Mechanical loss factor: 0.21 (per DIN 53513)
- Rebound resilience: 45%
- Compression set: less than 5%
- Min. tensile elongation at rupture: 200%
- Temperature range: -30 degrees C to 70 degrees C
- Flammability: class E per EN ISO 11925-2 (EN 13501-1)
- Standard dimensions: 12.5 mm or 25 mm thick; rolls 1.5 m wide by 5.0 m long; strips up to 1.5 m wide and 5.0 m long
- Custom dimensions: punched and moulded parts available on request
Applications
SR 28 is used under lightweight floating floor constructions, light machinery and equipment in residential and commercial buildings, and sensitive areas such as recording studios or laboratories where very low residual vibration is required. The relatively high mechanical loss factor of 0.21 provides good damping performance across a range of excitation frequencies.
Frequently asked questions
What distinguishes SR 28 from SR 18?
SR 28 has a higher reference specific load (0.028 N/mm2 versus 0.018 N/mm2) and a higher static modulus of elasticity (0.19 N/mm2 versus 0.08 N/mm2). It is suitable for slightly heavier loads than SR 18 while still providing a low system natural frequency for lightly loaded installations.
Can SR 28 be cut to custom shapes?
Yes. In addition to standard rolls and strips, Getzner supplies punched and moulded parts on request, allowing custom bearing pads to be produced to suit specific project geometries.
What is the maximum occasional load SR 28 can sustain?
The datasheet specifies load peaks of up to 1.0 N/mm2 for occasional, brief loading, corresponding to approximately 75% deformation.
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.