Silicone Sealants – Bostik
Technical Data Sheet
BOSTIK MIRROR
Characteristics
BOSTIK® MIRROR is a neutral-curing, low modulus 100% silicone sealant with outstanding
adhesion that gives a permanent flexible bond for mirrors to painted surfaces, plaster,
metal and wood.
Features
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Acid free – will not desilver or discolour mirrors
Non-sag
Low odour
Outstanding primerless adhesion to a variety of substrates
Suitable for alkaline substrates such as concrete, plaster, fibrous concrete
Excellent UV-resistance and durability
Excellent mould resistance
Flexible at low temperatures down to -40°C
Heat resistance up to +120°C
Low shrinking on curing
Abrasion resistant
Excellent water-resistance
Unaffected by alcohols, dilute acids and alkalis, soap and household detergents
Excellent colour fastness
Moisture curing system; cure rate is unaffected by low ambient temperatures
Non corrosive to metals
Applications
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Ideal for mirror installations, bonding mirrors to painted surfaces, plaster, metal and wood
In addition, BOSTIK® MIRROR is also suitable for sealing, bonding, and mending tasks in
car, boat, caravan, and house, such as:
o Sealing around bathroom and kitchen fittings
o Sealing around oven doors, boards, signs, insulating appliances
o Sealing of connecting and expansion joints in walls and floors
o Sealing of gutters, gutter outlets and around building flashes
o Perimeter sealing of doors, windows and cladding panels
o Insulating electrical appliances
Adhesion
BOSTIK® MIRROR exhibits excellent primerless adhesion to many non-porous materials
e.g. ceramics, glass, enamel, porcelain, coated wood, painted surfaces, canvas, rubber,
many metals (stainless steel, aluminium, lead, copper, tin, galvanized iron, brass or zinc)
and some plastics (epoxide, polyester, polyacrylate, formica, fiberglass, acrylics,
polycarbonates and rigid PVC).
BOSTIK® MIRROR can be used on alkaline surfaces such as concrete, fibrous cement,
mortar, asbestos, plaster and substrates such as marble and stone.
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Restrictions on use
BOSTIK® MIRROR used in contact with marble, granite, quartzite and similar natural
stone, may cause staining.
May become discoloured in contact with some organic elastomers, which tend to bleed oil
or solvents into the silicone, e.g. EPDM, APTK, Neoprene and Bituminous surfaces.
Will not adhere to some plastics such as polyethylene, polypropylene and Teflon.
CANNOT be over-painted.
NOT SUITABLE FOR FISH TANKS (contains a fungicide).
Do not apply sealant when relative humidity is below 10% - cure rate will be affected.
Safety instructions
When working with uncured BOSTIK® MIRROR, it is advisable to wear gloves in order to
avoid direct contact with the skin. During curing, methanol is released. These vapours
should not be inhaled for long periods or in high concentrations. Consequently, work in a
ventilated area. If BOSTIK® MIRROR comes in contact with skin or eyes, flush thoroughly
and immediately with water. If irritation continues, seek medical attention.
Cured silicone rubber can be handled without any health risk.
Refer to our Material Safety Data Sheets for further toxicological information and
comprehensive handling instructions.
Surface preparation
The surface coming into direct contact with BOSTIK® MIRROR must be clean, dry, free
from all loose materials, dust, dirt, oil, rust and any other contaminants.
Non-porous substrates such as metals, glass and plastics should be degreased with a
solvent. Plastics can be lightly abraded with emery paper. On no account must any
type of alcohol be used for surface cleaning – alcohols inhibit the cure of
silicones.
Ensure also, that if soaps or detergents are used to clean the surface that it is rinsed down
thoroughly with clean water to ensure that all traces of the soaps are removed before
sealing.
As a caution, it should be remembered that poor surface preparation may result in the
delamination of the silicone.
Directions for use
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Ensure that surfaces are prepared as above.
Remove cap from tube and pierce film with reverse side of cap to break seal.
Cut tip off nozzle at an angle to achieve the desired bead size and screw nozzle onto
tube.
Apply silicone in narrow vertical beads.
After applying the adhesive, press the mirror
onto the surface.
Support blocks or adhesive tape must be used to
provide initial support until the silicone is fully
cured (approximately 48 hours).
Uncured silicone can easily be removed from the
hands or tools using a clean solvent soaked cloth,
e.g. turpentine or paraffin. If removing uncured
silicone from clothing, check fabric colourfastness
before applying the above-mentioned solvents.
When fully cured, sealant can be removed by
mechanical means, i.e. with a sharp knife or
chemically, with a Silicone Stripper.
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Storage stability
BOSTIK® MIRROR has a shelf life of at least 15 months if stored in a cool (below 25°C),
dry place in it’s original moisture-tight container.
If the material is kept beyond the recommended shelf life, it is not necessarily unusable,
but a check should be performed to observe whether the product is still workable, applyable and uncured.
To maximize the shelf life of the opened cartridge, it would be advisable to create an
airtight environment. This can be achieved by removing the nozzle and wiping down the
opening, placing a piece of plastic over it, and finally screwing the nozzle back on. Store
in a cool environment.
Product Data
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Uncured Silicone
Clear, Homogenous Non Sag Paste
Appearance
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Density
ISO 1183
1.03g/cm3 at 23°C
Skin over time
ISO 7390, Profile U20
Approximately 15 Minutes
Curing time
Approximately 24 hours per 2mm
Slump NF P 85516
0.00mm
Coverage
4 meters (5mm x 5mm joint)
Cleaning
Turpentine or Paraffin
Packaging
Sizes
Shelf life
310ml Cartridges
12 months when sealed and stored below 25°C
Cured silicone
Service temperature range
Min. -40°C to Max. +120°C
Tear Strength
ISO 34 Method C
4.0 N/mm2
Tensile Strength
ISO 8339
0.6 N/mm2
Modulus at 100% elongation
ISO 8339
0.36 N/mm2
Movement Accommodation Factor
ISO 11600
25%
Ultimate Elongation
ISO 8339
300%
Shore A Hardness
ISO 868
18
Cleaning
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Product Packaging
The above information is only offered, as a guide to the use of this product. Furthermore, users should satisfy
themselves that it is suitable for their needs. Since we have no control over the conditions under which it is used, we
cannot accept responsibility for problems caused by the use and/or application of this product.
June 2005
Head Office: 021-555-7400
Toll-Free No: 0800-222-400
Beverley Close, Montague Gardens, 7441
PO Box 37008, Chempet, 7442
http://www.BOSTIK.co.za
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