Once you’ve selected cold-applied liquid roofing or waterproofing as your method of choice, how then do you choose between the different products available to you?
KEMPEROL® is applied 'wet-on-wet', and when it comes to cold-applied liquid water-proofing, this consistently outperforms all other methods.
Why is this? - Many systems use a base coat with a chopped strand mat for reinforcement, which once applied has to be allowed time to cure. Whilst curing, wet-on-dry systems run the risk of surface contamination from wind borne debris or rain. Any burs from the reinforcement need to be removed and the surface cleaned before application of the top coat to avoid the risk of 'pin-holing' that can allow moisture to track into the system. The unreinforced 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 rsin, reinforcement fleece and surface resin build-up into a single, chemically bonded layer with no laminations.
This forms an inseparable membrane that avoids all the risks of 'thin spots' and lack of adhesion between coats which can lead to delamination - the downfall of two-coat, wet-on-dry systems as it can lead to a break up of the surface and exposure of the unprotected base layer to UV which further breaks down the membrane leading to water ingress.
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 their contractors use a depth gauge. However this is only as accurate as the point at which it is used. 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.
|No risk of delamination between top and base coats|
|Fast – no waiting for base coat to dry|
|No risk of ‘thin spots’ associated with wet-on-dry systems|
|Fully certified and tested: EOTA, FM, DIN, BBA|
|Exceptional performance: elastic, permeable, UV-inert|
|Over 50 years proven performance|
|Full range of surfacing options|
|Installed only by trained contractors|
|Optimum impregnation of the fleece is easily visible with 'wet on wet',|
|avoiding risk of operator error and need for depth gauges|
Optimum impregnation and saturation of the reinforcement fleece is easily visible with 'wet-on-wet', avoiding the risk of operator error and need for depth gauges