Vermitex^®® 'ACUSTICO'

Acoustical Coating
(Interior applications)

Product Description

Vermitex^® ‘Acustico’ is a non-combustible, lightweight Gypsum-Vermiculite blend designed for application by spray machine. It was developed primarily as an acoustic product for application in areas that require sound absorption, such as ceilings and walls. It does not contain asbestos nor other forms of fibre. Vermitex^® ‘Acustico’ is factory premixed to ensure product consistency, quality and ease of application on-site.

Recommended Uses

Vermitex^® ‘Acustico’ can be applied, in most cases, to ceilings and other internal/external surfaces without reinforcement. A thin ‘key coat’ is normally all that is required to achieve bonding to the substrate. Coats are then applied progressively to achieve the specified thickness. Refer to the Manufacturer for surfaces that require mechanical reinforcement (i.e. mesh). Vermitex^® ‘Acustico’ is designed for mechanical spray application and is not suitable for application by hand or trowel.

Product Characteristics

Tested Properties

Application Instructions

Vermitex^® ‘Acustico’ is a mill-mixed compound that can be sprayed onto substrates requiring protection at the corresponding thickness stipulated by the Manufacturer (refer Thickness Tables). The element being protected should be free from: mill scale, heavy rust, oil, excessive dust or any other substance which may impair proper adhesion of the Vermitex^® ‘Acustico’ to the background.

Mechanical reinforcement is not required for thickness specified in the Thickness Tables, however on continuous smooth surfaces, either horizontal or vertical and especially if subject to continuous vibrations, thermal or construction movement, the installation of a ‘Primer/Bond-Coat’ equal to Vermitex^® ‘7’ is recommended. Where surfaces are exposed to severe environmental conditions, flexural stresses, vibrations, thermal expansion and construction movement LAF strongly recommends the installation of mechanical reinforcement to follow the contour of the element, with the mesh located approximately 2/3 through the spray thickness.

Vermitex^® ‘Acustico’, when applied in ventilated areas to a thickness of 25 mm, will dry in 2 weeks. Please note that Vermitex^® ‘Acustico’ is prone to frost damage and temperatures surrounding the areas being sprayed should not be allowed to fall below 4° C for up to a week, after installation. The material can be applied to a thickness of 20 mm in one application. Thicker applications are possible, however this will depend on the state of the background being sprayed, its water-uptake capacity and the experience of the applicator. Multiple coatings will achieve a smooth and even textured finish, however a new coating should only be applied over one that has partially set. Where this is not possible, the last coating surface should be left with a ‘deep & rough texture’ or purposefully scratched. When ‘Trowelling’ or ‘Ruling’ is unavoidable the applicator should take care not to ‘overwork’ or ‘polish’ the sprayed material.

Vermitex^® ‘Acustico’ may be painted however suitable sealers and paints are required. (1)

Bond Coat, Primer Compatibility and Corrosion prevention

When applying Vermitex^® ‘Acustico’ to primed or unprimed structural steel without the aid of mechanical reinforcement a ‘Bond Coat’ equal to Vermitex^®‘7’ should be applied. No specific thickness is required when spraying Vermitex^®‘7’, however coverage of between 50 and 75 % of the area is required. Vermitex^®‘7’ will enhance the adhesion of the Vermitex^® ‘Acustico’ to the substrate as well as facilitate application by reducing ‘slippage’ on smooth backgrounds.

Where primers are required, alkali resistant Zinc rich primers are recommended, however the paint manufacturer should be consulted to ensure compatibility with the Vermitex^® ‘Acustico’ (Refer to LAF for a comprehensive list of compatible primers).

In high humidity or in wet areas Vermitex^® ‘Acustico’ should not be relied upon as a rust preventative coating. Vermitex^® ‘Acustico’ is porous and will allow the passage of moisture through to the substrate. If a concern exists about moisture levels, the substrate should be suitably primed with an approved rust preventative primer. Chemicals that have an impact on plaster will also have an impact on Vermitex^® ‘Acustico’. In these circumstances the Vermitex^® ‘Acustico’ may be ‘impregnated’ with special sealers. (1)

Vermitex^® ‘Acustico’ may react with Aluminium and Aluminium alloys and a suitable primer is recommended.

Coverage

One 50 litre bag of Vermitex^® ‘Acustico’ will cover approximately 1 m² at a nominal thickness of 50 mm.

Vermitex^® Specification (Broad Form)

Prior to Vermitex^® ‘Acustico’ application commencing, the substrate shall be inspected by the Main Contractor to ensure all elements to be sprayed are free from any substances which impair proper adhesion of the spray material. All adjacent areas not requiring treatment shall be suitably protected against droppings and overspray.

Vermitex^® ‘Acustico’ as manufactured by L & A Fazzini Manufacturing Pty Ltd shall be installed by approved Specialist Contractor to the thickness of ..xx.. mm to provide a NRC of ..yy.. ..(insert required thickness & NRC).. .

The Specialist Contractor shall provide all materials, accessories, spray equipment, tools, inspection services and labour to satisfactorily carry out the works in best trade practice. All workmanship and installation techniques shall comply with the Manufacturers ‘Application Instructions’, relevant Building Code Statutory requirements and applicable ASTM, BS or AS Standards.

Test Data & Assessments

Refer to Test Data for more information

Health Statement

Vermitex^® ‘Acustico’ contains no asbestos and presents no known health hazard before, during or after application. Normal precautions relevant to the handling of gypsum products apply: dust mask, eye protection and covering of sensitive skin.

Note: 1. Refer to LAF for further detail and information.

For more information or MSDS on Vermitex^® ‘Acustico’ or any other products,

please see the technical data page, or contact: L & A Fazzini Manufacturing Pty Ltd

Email:sales@lafgroup.com