Cafco® TOPCOAT 200 - Acrylic Polymer Coating
INTRODUCTION
CAFCO® TOPCOAT 200 is a single pack, water based acrylic polymer for use as a water vapour permeable topcoat with excellent adhesion. It may be applied by spray, roller or brush.
CAFCO® TOPCOAT 200 is applied over vermiculite and Portland cement based fire resistant coatings that protect steel and concrete substrates against ingress from salt spray, washdown water, chemical spills, rainfall and sprinkler deluge systems.
CAFCO® TOPCOAT 200 may also be used on masonry, brickwork and blockwork, whether dry or damp.
| Properties and performance |
| Colour and finish |
Usually matt white or grey Please contact Promat for other colours |
| Thickness per coat |
150-200 microns wet film thickness (WFT) 68-90 microns dry film thickness (DFT) |
| Practical coverage |
Dependent on surface texture, substrate porosity, application method and technique |
| Theoretical coverage |
6.7m2/litre at 150 microns WFT 5.0m2/litre at 200 microns WFT |
| Number of coats |
Normally two coats. It is recommended that the first coat is a different colour from the second coat for identification purposes |
| Cure |
By air drying |
| Drying time |
Touch dry ½ to 1 hour at 20°C and 50% RH Fully dry 2 to 6 hours at 20°C and 50% RH
Varies with ambient conditions, but high humidity, low temperature and low air change will hinder cure significantly
|
| Water vapour transmission |
25g/m2 over 24 hours for 150 microns tested to BS 3177: 1959 |
| Surface spread of flame |
Class 1 to BS 476: Part 7 on non-combustible substrates |
| Volume of solids |
45% |
| Weight |
1.4kg/litre |
ADVANTAGES
- CAFCO® TOPCOAT 200 does not blister when used on steel and concrete substrates because of its water vapour permeability
- Flexible, flame retardant, mould resistant, and helps reduce the carbonation rate of cement based products.
| Preparation |
| Typical substrates |
Concrete, sand-cement renders, masonry and Promat cementitious fire protective coatings |
| Substrate preparation |
Surfaces to be coated must be free from oil, grease, visible moisture (including condensation), dirt, dust and mould.
Cafco cementitious coatings should be surface dry before the application of CAFCO® TOPCOAT 200
|
| Application |
| Methods |
Stir CAFCO® TOPCOAT 200 before use (do not thin) and apply with an industrial type airless spray or lambswool roller. The latter is not recommended on heavily textured surfaces
CAFCO® TOPCOAT 200 may also be applied with a wide nylon or bristle brush in small (maximum 1m2) areas only
|
| Limitations |
CAFCO® TOPCOAT 200 may be applied when the substrate and air temperatures are at least 5ºC and rising. Maximum air and substrate temperature is 40ºC
Substrate temperature should be at least 2ºC above dew point temperature
Protect from rain, hail etc until dry
|
PACKAGING
25 litre metal pails.
STORAGE
Protect from frost, excessive heat (above 45ºC) and strong radiant sunlight.
SHELF LIFE
Maximum 6 months in original sealed containers.
ENVIRONMENTAL
Do not discharge into drains, watercourses or soil.