Line marking warranties are never as straight forward as we would like, especially for warehouse floors. Why? Because there are a number of factors that may affect our perceptions of a successful line marking job.

The chemical bond:

The key factor is the quality of the chemical bond created between the paint and the substrate. The truth is, that this bond is not so much influenced by ‘how’ it is applied, but the quality and type of coating used, and how the slab has been finished.

Over recent years there has been a large increase in the use of concrete curing accelerators by construction companies under pressure to get warehouses up quickly. The hidden drawback to this only appears when you line mark the concrete. During the slab’s curing process the contained moisture rises, bringing the accelerant up with it, leaving a coat of accelerant over the surface.

This is causing great problems within the line marking profession as virtually no ‘off-the-shelf’ line marking paint will bond with it. Standard paints simply delaminate within a short period of time, as it hasn’t properly bonded with the concrete. Even the major paint manufacturers will not warrant their paints if it is not keyed directly to the slab. If your site has a new concrete slab, it will be worth contacting the construction company to find out if an accelerant was used and if so which one. Then following discussions with our industrial chemist we can offer more accurate advice on which paint to use and if an alternative surface preparation is advisable.

There are also a large variety of concrete sealers & densifiers being used, each with it’s own chemical properties. We are increasingly finding that sodium or lithium silicates have been used to help seal the concrete and give a nice shiny appearance.  Silica is the main raw material in glass, hence the good looking, shiny finish.  The drawback - virtually no paint will bond with this type of surface without it being removed.  Selecting the right paint to go with the sealer, is an important part of the process. Again, knowing what sealer was used will help the paint selection process.

The type of traffic:

Sometimes we come across an expectation that line marking paints will deal with anything thrown at it. Unfortunately this is just not the case. Warehouse floors are a tough environment for paint, with forklift tyres constantly scrubbing and wearing those chemical bonds away. Thus life expectancy in high traffic vehicle areas can be considerably less than simple pedestrian only areas.

The type of paint:

There is a variety of line marking paints available from water based, to chlorinated rubber and two-part epoxy paints each with different chemical properties and all varying in price. Some are suitable for concrete, others more for bitumen.

The warranty:

With all the above in mind, our warranty thus covers you against delamination of paint as a result of faulty workmanship. The warranty we offer, written or implied, is also issued subject to a strict maintenance regime and the establishment of good housekeeping practices.

If this all seems a bit daunting, don’t worry too much, we have a team of industrial chemists who work with us to ensure we get as close as possible to matching the right paint with your environment. Call us for further advice.

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