Decothane Clearglaze

Resistance to fire - Class “O” rating on concrete surfaces BS 476 Part 6 and 7.

One-component moisture-triggered aliphatic, polycarbonate polyurethane.

A shelf-life of 12 months is achieved when stored in accordance with the above recommendations at a temperature of 20°C.  Exposure to higher temperatures will reduce the shelf-life.

Store in original, unopened and undamaged sealed packaging in dry conditions at temperatures >0°C and <25°C.  Protect from frost.

Reference should also be made to the storage recommendations stated on the material safety data sheet.

1.20 kg/l (at 23°C)

40 °C

~64.9 %

~59.5 %

~35 N/mm² (unreinforced)

-50 to +80 °C.

No change after 500 hours at 80°C, other than slight discolouration.

Resistant to standard 10 % solutions of mineral acids, most alkalis, acid rain and detergents.

Some oils and solvents may soften the surface.

Salt spray to BS 3900 Part 4 and ASTM B117 - 500 hours.  No rusting, blistering or delamination.

QUV ASTM G53.77 – 5000 hours.  No deterioration; clarity retained.

No mixing required.

+2 °C minimum / +35 °C maximum

Note: when applying Decothane Clearglaze by spray equipment, the material must be kept above +10°C.

20 % minimum / 85 % maximum

Beware of condensation. Surface temperature during application and cure must be a minimum of 3 °C above dew point.

+2 °C minimum / +60 °C maximum

Wood moisture equivalent (wme) (maximum): <28%.

Please note: Reference should also be made to the appropriate primer technical data sheet.

Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

The coverage rates for Decothane Clearglaze will depend on the intended function of the coating.  Please consult Sika® Technical Services for details about specific applications.  The following rates are for general guidance only.

Application Instructions

Mixing
 
No mixing required.
  
Application Method
 
Once the relevant system has been selected, please refer to the above for details of coverage rates. Please note that the rates quoted are for smooth, sealed surfaces. Rough, porous, absorbent or undulating surfaces will inevitably increase the quantity of coating required, particularly at the embedment / first coat stage, to achieve the necessary film thickness and a pinhole-free finish.
 
Surface preparation for a clear coating must be thorough, particularly in relation to the removal of all organic growth. Always allow primers and any previous coat to dry / cure thoroughly before applying the following coat. Coatings will generally require curing overnight, although under optimal conditions (at higher temperatures and low relative humidity) work may often recommence sooner. Please consult Sika® Technical Services Department for further details.
 
Note 1:  Do not thin or brush-out like conventional paints. 

Note 2:  When using brushes, the first coat should ideally be applied in one direction only, where possible, the second coat should be applied at right angles to the first.
 
Application Tools
 
Application is primarily by brush or roller. Use only dry equipment free from water. Airless spray may be used but this must be followed by the use of a roller to de-aerate. Rollers should be pre-wetted with the coatings when used for this purpose.
 
Rollers: Good quality (non-shed) medium pile sheepskin roller. Use on flat or undulating, but not rough, surfaces. Apply in two coats, using light pressure, to bring up to the required coverage rate. Do not overwork. For applications in excess of 1.0 l/m² total coverage, three coats may be required to avoid slump.
 
Brushes: Always use a soft nylon or bristle brush. Apply in two coats. Apply second coat at right angles to the first wherever possible. Application limits per coat are the same as those quoted for roller applications.
 
Airless Spray: Up to 0.5 l/m² may be applied in a single coat; greater amounts will require two or more coats. Use a roller after each application to remove entrained air. Use a Graco King 60:1 or equivalent with a tip size of 0.28mm to 0.43mm. The wet coating will not be clear. When not in immediate use, seal off to avoid curing at air exposed points.

Clean all tools and application equipment with Sika® Thinner C immediately after use.  Hardened and / or cured material can only be removed mechanically.