Once you’ve selected cold-applied liquid waterproofing as your method of choice, how then do you choose between the different products available to you?

Only one leading brand – Kemperol – is applied “wet-on-wet”, and when it comes to cold-applied liquid waterproofing, this consistently outperforms all other methods.

Why is this? - All other systems use a base coat, which once applied has to dry, and onto which the finishing coat is finally applied to effectively create a laminated system where the performance of the whole roof is dependent on bonding between the two separate layers.

Kemperol, however, is applied wet on wet – a total integration of the base and surface build-up into a single, chemically bonded layer with no laminations. This forms an inseparable membrane that avoids all the risks of lack of adhesion, ‘thin spots’ or even delamination that can be the downfall of two-layer, wet-on-dry systems.

It also saves time – with no need to wait for a base coat to dry – and has the further advantage that complete impregnation of the polyester reinforcing fleece is visible as it becomes saturated with resin. There is absolutely no mistaking when this has been achieved, which means optimum saturation and bonding to the substrate is assured.

With other, ‘wet on dry’ systems, it can be difficult to see when the correct depth of surface coat has been achieved and for this reason manufacturers recommend that contractors use of a depth gauge for complete peace of mind. On even small roof areas, this opens up the risk of thin patches which may jeopardise the total integrity of the roof, particularly in the most vulnerable areas or where standing water is likely.

Kemperol, which is applied wet-on-wet, completely overcomes this.

Kemperol wet-on-wet. Always the best for flat roofs.

• No risk of delamination between top and base coats
• Fast – no waiting for base coat to dry
• No risk of ‘thin spots’ associated with dry-on-wet systems
• Fully certified and tested: EOTA, FM, DIN, BBA
• 30 years proven performance
• Exceptional performance: elastic, permeable, UV-inert
• Full range of surfacing options
• Installed only by trained contractors