Catalytic Converters – When the car is running the catalytic converter gets extremely hot and if the car is left running whilst sitting on the tiles it may cause the tiles directly under the converter to expand through the heat. This is only a temporary issue, and the tiles will shrink back to their original size once the heat source has been removed. In a busy commercial garage, it is worth considering gluing the tiles down in-between the lifts or ramps where vehicles may be left with the engine running.
Staining from car tyres – Rubber tyres will stain almost every type of floor including bare concrete, painted and vinyl flooring. The stain is a chemical reaction and will not damage the tiles or impact on their durability.
What causes the staining? Staining is caused by a component called '6PPD' (Phenaline Diamine) that is used when manufacturing car tyres. 6PPD is an antioxidant that is added to rubber products to prevent degradation and cracking.
It also has other beneficial effects in the moulding of rubber itself.
Staining is dark grey/green in appearance and usually appears within 4-5 hours of tyres being placed on tiles.
How to avoid the staining issue? As staining in a dark colour, using darker tiles makes it far less obvious and almost indistinguishable from the colour of the tile itself, it would be the smartest choice to use black or graphite (and amongst the most popular too). If you wish to use the lighter colour tiles to brighten up your garage or workshop, it's worth designing the floor in a layout that incorporates different colours, using the darker coloured tiles where the vehicle will be parked.