Working with A1
Inspection & Maintenance
A1 FAQ Start
Will A1 undergo aesthetic changes
A1 is a mineral based product and will change aesthetics under the influence of UV and moisture. A1 objects that are not protected and placed in an outdoor environment will quickly lose a fraction of their top layer (is a fraction of a mm) with (often) the result that the object becomes more intensive in colour. Also after a rain shower A1 objects absorb moisture and therefore become darker in colour to become lighter in colour during a dry period. Accept A1 is a natural material and that these aesthetic changes are part of it. If the A1 object must remain colourfast, a coating or paint system can be a solution.
How often do I have to inspect an A1 object on damageEven if the perfect A1 object has been made, it can happen that due to an external influence such as a collision, a storm or a very long period of moisture exposure, the object is (slightly) damaged, for example, at the coating or the A1 top layer. Therefore, inspect the A1 object for damage at least once a year. These can often be remedied quite easily.
How important is maintenance on an A1 objectWith prolonged and intensive UV and moisture exposure, coating and paint systems require regular maintenance. From our tests we see that (particularly on the sunny side) the Sealer PLUS is also subject to erosion and as a result the protection of the A1 decreases. On our North side and in particular on the A1 objects placed close to the ground, we see an increase in alga deposits on the test panels. Cleaning the A1 object at least once a year (soft brush) and applying a new coating every few years provides extra protection for the A1 and thus extends its lifetime.
How much A1 do I need
When applying 1 layer of A1 of 1 mm thickness you will use 1.75 kg A1 per m² (1 liter A1 = 1.75 kg).
In a mould you normally work with a first layer of 1 to 2 mm. Next, we advise to use 3 layers of A1 Triaxial fibre. In order to achieve this will have to apply 4 layers of A1 of 1 mm. Normally in a mould we thicken A1 for the first layer with Thix A. Make sure this layer is hardened before applying the next layers to avoid print through of the A1 Triaxial fibre. Use 1 layer of A1 between your hardened first layer and the first layer of A1 Triaxial fibre in order to make a proper bonding.
As an example needed for a project of 5 m²:
- 2 mm 1st layer
- 4 layers of 1 mm A1 in order to apply the 3 layers of A1 Triaxial fibre
Total 6 mm of A1 x 1.75 kg per layer x 5m² is 52,5 kg of A1, consisting of 17.5 kg A1 Liquid and 35 kg A1 Powder. Be aware that this is an indication and not a general rule.
Laminate A1 Triaxial glass fabric with sufficient A1
Using our A1 Triaxial fabric is an excellent way to strengthen A1. Two or more layers of A1 Triaxial fabric laminated in the A1 creates strong A1 objects. Unlike materials such as polyester and epoxy, the A1 does not absorb the glass fabric but clamps it between 2 layers of A1. The A1 in this case acts like a sandwich with the fabric sandwiched. That is why it is important to use sufficient A1 between the different glass fabric layers. Working too ‘dry’ results in a less strong end result and gives a greater chance of delamination (release of the different layers), which we want to avoid. Also on the very first layer before the 1st layer of glass fabric is applied (more than) sufficient A1 should be used to create an adhesion between the first layer and the glass fabrics.
In addition, we advice to apply the different glass fabric layers (alternating with A1 layers) directly after each other. Work wet in wet to get an optimal bond between the different layers.