Technical Data Sheet - Maxisil N Natural Stone Silicone sealant

Non – Staining Silicone Sealant for Natural Stone e.g. Granite and Marble

Description - Maxisil N Natural Stone

• Is a high-performance one-component silicone sealant
• Is based on a neutral cross-linking system
• Vulcanizes at room temperature (RTV)
• Best long, life reliability – stays rubbery from - 40°C to +180°C without tearing,
• Cracking, drying or becoming brittle.
• Higher tear resistance.

Fields of application

Maxisil N Natural Stone does not stain natural stone. e.g. granite and marble and is designed for:

- A wide variety of applications in the building sector. For example it can be used for:

- Sealing medium movement and connection joints of natural stone façades

- The natural stone flooring, bathroom and kitchen sector

- Sealing other natural stone building components.

- Interior / exterior use.

Maxisil N Natural Stone guarantees that there is no danger of migration of softeners or other components into the edges of the stone, however, when combined with commercially available standard sealing materials, the combination can lead to staining of the edges. This also applies to sandstone, granite, aggregate and concrete.

Advantages

• Designed for natural stone applications (In contrast to conventional sealants, Maxisil N natural stone does not stain natural stone).
• Fast curing and short tack free time.
• Good tooling and smoothing properties
• Very good adhesion and compatibility, especially to metals (non-corrosive) and various paint systems.
• Primerless adhesion to many substrates/surfaces.
• Excellent ability to withstand weather, resistance to ageing, UV-radiation, chemicals and very good temperature resistance.
• High tensile strength and high shore-A-hardness ensure a high notched impact value (suitable for medium expansion joints in the flooring sector)
• Ready-to-use
• Low odour
• Contains no solvents, formaldehyde, CFC, PCB, PCP
• Equipped with fungicides
• 26 standard colours in stock - special colours available on request

1. Technical data

This data is not intended for use in preparing specifications. Please contact ROBERTS DESIGNS before writing specifications.

2. Instructions for use

2.1. Surface preparation

Compatibility: Paints, lacquers, plastics and any other coatings must be compatible to the sealant.

 

Cleaning: Clean all joints/substrates, remove all foreign matter and contaminants such as grease, oil, dust, water, frost, surface dirt, old sealants, glazing compound, protective coatings (e.g. bituminous coatings) and other substances which can affect adhesion. The joint edges must be firm.

 

Cleaners for porous substrates: They should be cleaned with a stiff-bristled brush, rubbed down or sand-blasted.

 

Cleaners for non-porous substrates: They should be cleaned with Maxisil N Cleaner, methylated spirits or other cleaners on an acetone or isopropanol basis. Use a clean, lintfree, cotton cloth.

2.2. Back-up foam and tape

Back-up foam should be inserted in order to establish the correct depth of the joint and to avoid adhesion to the bottom of the joint.

 

Indoor use: PUR (polyurethane) back-up foam

 

Outdoor use: PE (polyethylene) back-up foam, as cells are closed and water repellent

 

Shallow joints: PE back-up tape

2.3 Primer Schedule

Symbols use for recommended primers

- Not recommended

+ Good primerless adhesion

T Test recommended

2.4 Primer schedule natural stone

Primerless adhesion Primer 1216

2.5. Adhesion and priming:

Application Primer: The primer must be applied in a thin even layer on the flanks of the joint. Primers - do not spread primers on the surface of the natural stone: Primers must be applied carefully, because stains/spots might appear if primers are spread or spattered on the surface of some natural stones.

 

Permanent water/wet stress: For natural stone joints, which are subject to permanent water/wet stress e.g. in bathrooms, showers, we recommend you apply always Primer 1216 on the flanks of the joint.

 

Sandstone: For sandstone joints, we recommend you apply always Primer 102 after the joints have been cleaned with a stiff-bristled brush.

 

Other natural stones: Please make your own tests or consult our technical department.

 

High demands on adhesion: Extreme fluctuations in temperature, tensile or shear forces and permanent water cause high stress on adhesion. In such cases, it is advisable to apply primer according to the recommendations of our technical department.

2.6. Application sealant

Avoid direct contact between sealant and plasticiser - emitting products: Direct contact between sealant and the following plasticiser - emitting products should be avoided because these products may cause yellowing of lightcoloured silicone sealants e.g. butyl rubber, ethylenepropylenedienemonomerpolymer (EPDM), neoprene and bituminous coatings and products.

 

Application sealant: Sealant must be applied after the primer has dried for at least 15 minutes. Avoid air entrapment: The joint must be completely filled to avoid air entrapment and to make joint leak-proof.

 

Tooling/smoothing: The sealant must be smoothly tooled before a skin forms in order to ensure integral contact with joint flanks. Our smoother shows an excellent tuning to our sealant and is particularly kind to the skin.

 

Tooling - do not spread the sealant on the surface of natural stone: The sealant must be applied in the joints and not on the surface of the natural stone, because it is difficult to remove the sealant once it has seeps into the pores of the natural stone, especially in the pores of unpolished natural stones.

 

Smoothing - apply Smoothtex: Some natural stones are sensitive to conventional smoothers, such as washing-up liquids. Stains /spots are caused often on the surface of the natural stone. Therefore we recommend that you do not use conventional smoothers, but use instead Smoothtex undiluted.

 

Masking tapes: Masking tapes must be removed immediately after tooling

 

Silicone sealant and overprinting: The paint film will not stretch with the extension of the silicone sealant. The paint film may crack or peel; the silicone sealant may be damaged.

 

Non-ferrous metals: Trapped-splitting products may react with non4errous metals (e.g. copper and brass). Splitting products must evaporate easily.

2.7 Maintenance and cleaning

Cleaning and disinfecting: Maxisil N natural stone is equipped with fungicides. It is of great importance to support the fungistatic properties of Maxisil N natural stone by cleaning and disinfecting the joints regularly. ROBERTS DESIGNS recommends keeping the joints clean and disinfecting with usual sanitisers/disinfectants weekly. Afterwards joints should be rubbed dry.

 

Steam-jet apparatus: On using a steam-jet apparatus, the distance between the joint and the steam nozzle should be at least 70 cm.

3. Technical service and consulting

Our technical department provides access to laboratory facilities and application support.

4. Colours

Standard colours - See colour table

Special colours - upon request

5. Packaging

Other packaging on request

Primer: 100ml, 250ml, 500ml or 1000ml aluminium bottle

Smoother: 250ml, 1000ml, 5 L, 10 L, 60 L and 200 L

6. Safety

Please refer to our material safety data sheet that is available on request.

7. Disposal

Disposal should be made in accordance with federal, state, and local regulations.

8. Warranty

All information, data, direction or advice presented by ROBERTS DESIGNS is believed to be accurate and reliable, but do not absolve the user from carefully checking all supplies immediately on receipt. However, as ROBERTS DESIGNS has no control over the uses to which its products may be put or the conditions of use, it is the user's responsibility to determine suitability of use e.g. by performing own tests.

 

ROBERTS DESIGNS makes no warranties concerning the fitness or suitability of its products for a particular use. Statements concerning possible or suggested uses of the materials described herein can not be seen as warranty for your application.

 

ROBERTS DESIGNS warrants only that its products will meet it’s specifications. We reserve the right to alter product constants within the scope of technical progress or new developments of course, ROBERTS DESIGNS can perform tests and deliver a special written recommendation for a specific application on request. If the application in which the products are used requires governmental approval or clearance, the user must obtain it.

 

In the event of a claim due to failure of our products, ROBERTS DESIGNS sole liability is limited to provide sufficient product for replacement. ROBERTS DESIGNS will not be liable for any labour or any other costs associated with the failure. The recommendations do not absolve the user from the obligation of investigating the possibility of infringement of third parties' rights and, if necessary, clarifying the position.

9. Edition

01/07/2006

This edition becomes invalid in the event of a republication.

Roberts Designs

204 Boneo Road

Rosebud VIC 3939

 

Phone: (03 5986 6366

Facsimile: (03) 5986 6680