K-13

Spray-on Acoustic Decorative Finish

K-13 is spray applied directly to most substrates: concrete, plasterboard, GRP, steel, glass, expanded polystyrene. Domes, vaults, profiled, corrugated, flat, in fact any shaped substrate can be sprayed with SonaSpray K-13.

Available in a range of standard colours from stock K-13 can also be specially manufactured to the client’s colour requirement (minimum quantity applies).

Carbon Neutral – Low Embodied Energy – Good for the environment – Recyclable Naturally safe recycled cellulose fibre.  Reconstruction of a building may necessitate removal of SonaSpray cellulose fibre. It can be recycled or disposed of as a non-special waste to landfill - your local authority waste disposal will give advice on recycling.

SonaSpray K-13 is a total system, with in-built treatment for fire and mould resistance and colouring through the full thickness of the coating. Manufacture is accredited ISO 9001: 2000 Certification.

Finding an acoustic product that would take the shape of the dome, appear as black as night and therefore  invisible to the audience, would normally have been an ordeal, the problem was solved with through coloured Black SonaSpray K-13 from Oscar Acoustic’s range of acoustic decorative finishes.

Arup Acoustics the projects acoustic consultants carried out
an  extensive acoustic analysis of the new Planetarium  SonaSpray K-13 was then specified at 50mm for the curved concrete walls and 75mm thick for the discoid ceiling, the spray was installed in a single visit of 4 days spraying to the required thickness in one coat.

Other planetariums using SonaSpray: National Space Centre Planetarium, Leicester. Bristol Planetarium.

Technical Structure

Acoustic DATA:  
SonaSpray K-13 can be tailored to meet your specific project acoustic need. There is a choice of finish, you may select texture and colour and acoustic performance. SonaSpray K-13 can be applied at variable thickness and variable areas to provide a designed acoustic ambience. It is spray applied to the full thickness in one application.

SonaSpray K13 standard absorption coefficients

Test DATA certified by TNO Technical University Delft NL. Tests were on a solid backing, a sound absorbing fc panel substrate with air space behind the panel will change absorption; normally there is improved absorption at low frequency.

Thermal DATA: 
SonaSpray insulates by creating dead air spaces macroscopically between and within the hollow cellulose fibres. Testing on actual buildings demonstrates that sprayed insulation outperforms fibreglass batts that are mechanically retained. 100mm thick U = 0.32 W/m2K

Mass:    
Dry Weight of SonaSpray K-13 per 5mm thickness = 0.36 kg/m2
Dry Weight of SonaSpray K-13 per 25mm thickness = 1.8 kg/m2  

Bonding to Substrate:  
SonaSpray K13 sound absorber can be applied to virtually any substrate; some surfaces may need priming to control suction. Old surfaces may need a barrier coating to prevent staining from leaching out of contaminants while the surface is wet. Fully cured SonaSpray fc will improve strength.

Bonding Substrate:  
SonaSpray K-13 can be applied to virtually any substrate; some surfaces may need priming to control suction. Old surfaces may need a barrier coating to prevent staining from leaching out contaminants while the surface is wet. Fully cured SonaSpray K-13 will improve strength.

Condensation Control :  
For areas such as indoor pools and ice arenas, SonaSpray K-13 aids in condensation control. The proper combination of SonaSpray K-13 and ventilation prevents condensation on metal, concrete and other surfaces. SonaSpray K-13 actually reduces ventilation requirements, saving in both the ventilation equipment cost and operating costs.

RH Control : 
SonaSpray K-13 is a natural humidity moderator. At times of increasing humidity SonaSpray K-13 will absorb large amounts of water vapour. When the humidity drops SonaSpray K-13 will exhale water vapour and maintain a balance. This characteristic promotes a healthy atmosphere.

Durability:  
The adhesive used with SonaSpray K-13 provides a strong, durable and resilient bond.  When fully cured, surface strength of old plaster will typically improve by a large margin.

Where to use : 
SonaSpray K-13 can be quickly and effectively applied to any prepared surface and construction configuration. This allows minimum working down time in existing structures with abilities to meet critical deadlines in new construction.  SonaSpray K-13 has a coarse surface texture and is suited to large buildings with longer viewing distances; or use close up where a strong texture is required. Other SonaSpray products offer a finer surface texture.

Fire Performance Ratings:  
UK Fire test by Warrington Fire Research:
Class 1 to BS476 Part 7
Class 0 to BS476 Part 6

USA – Factory Mutual Standards research corp. approvals: category I, II, III, IV and V:

• Category I: As an interior finish material of low fire hazard [class I building material] over non-combustible surfaces not requiring automatic sprinkler protection in and of itself.
• Category II: As a protective coating to delay the ignition and reduce the surface burn rate of combustible wood and cellulosic fibre building material.
• Category III: As a protective coating to delay the ignition and reduce the surface burn rate of low melting point, combustible cellular plastic building materials and to protect their dimensional stability for a brief period.
• Category IV: Ass a protective coating for building structural steel to supplement automatic sprinkles protection in preventing structural failure temperatures of the steel in high fire hazard occupancies.
• Category V: As a protective coating to the underside of a Class II insulated steel roof deck construction to sufficiently lower the rate of fuel contribution from the Class II deck components to qualify the construction as Class I so allowing automatic sprinkler protection to be omitted under Factory Mutuals Standards . 

Maintenance:
SonaSpray K-13 can be over-painted or applied with additional coats of SonaSpray. Small areas of damage can be repaired by hand.
If SonaSpray K-13 is disturbed or damaged so that fibre is released into the atmosphere, the resulting contamination is harmless. Maintenance work can be undertaken while the building is occupied. Please refer to COSHH data for detailed product analysis.