KEMPEROL® 1K-PUR Waterproofing - KEMPER SYSTEM
KEMPEROL® 1K-PUR Waterproofing - KEMPER SYSTEM
KEMPEROL® 1K-PUR Waterproofing - KEMPER SYSTEM
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Technical Information 15<br />
Protecting against alkalinity of <strong>KEMPER</strong>OL ® and <strong>KEMPER</strong>DUR ® Products<br />
Without appropriate protection, <strong>KEMPER</strong> <strong>SYSTEM</strong> liquid polymer- or polyurethane-based<br />
products exhibit inadequate long-term resistance to media with extreme pH values and,<br />
therefore, must be protected against the damaging effects of alkaline media.<br />
On building sites there are many products exhibiting alkaline reactions, e.g. screeds,<br />
concrete, tile adhesives, etc. These materials contain large proportions of cement, whose<br />
principal constituent is calcium hydroxide, although there are also small amounts of sodium<br />
hydroxide. Dissolved in water (electrolytic dissociation), this sodium hydroxide exhibits a<br />
strongly alkaline reaction (up to pH 14).<br />
This means that when a product containing cement is placed directly on a <strong>KEMPER</strong>OL or<br />
<strong>KEMPER</strong>DUR product, e.g. a screed laid to falls or ceramic finishes laid in a mortar bed, over<br />
the long term there is the risk of damaging the waterproofing or coating system. In<br />
chemical terms this process is known as saponification. The saponification leads to<br />
embrittlement of the waterproofing or coating system, which reduces its elasticity.<br />
Adequate protection can be achieved only by applying a an alkaline protection layer on<br />
the cured waterproofing or coating membrane.<br />
On one-component products (e. g. <strong>KEMPER</strong>OL ® <strong>1K</strong>-<strong>PUR</strong>, <strong>KEMPER</strong>DUR ® Deko) the alkaline<br />
protection layer can be applied after 3 to 7 days, on two-component products (e. g.<br />
<strong>KEMPER</strong>OL ® 2K-<strong>PUR</strong>, <strong>KEMPER</strong>OL ® V 210, <strong>KEMPER</strong>DUR ® Deko 2K) the alkaline protection<br />
layer can be applied after one day.<br />
After this period of time, the <strong>KEMPER</strong>TEC ® EP-Primer, <strong>KEMPER</strong>TEC ® EP5-Primer or<br />
<strong>KEMPER</strong>TEC ® AC-Primer can be applied to the surface.<br />
This can be carried out in one operation with a thick coating, approx. 400-600 g/m2<br />
(<strong>KEMPER</strong>TEC ® AC Primer: max. 500 g/m²). <strong>KEMPER</strong>TEC ® NQ 0712 Natural Quartz is spread<br />
liberally (leaving no gaps) over the primer while it is still wet.<br />
However, in order to avoid imperfections in the protective layer, it is better to apply two<br />
coats of <strong>KEMPER</strong>TEC ® EP-Primer, <strong>KEMPER</strong>TEC ® EP5-Primer or <strong>KEMPER</strong>TEC ® AC-Primer each<br />
coat approx. 200-300 g/m2. With <strong>KEMPER</strong>TEC ® EP-Primer wait for one day, with<br />
<strong>KEMPER</strong>TEC ® EP5-Primer for 4 hours, with <strong>KEMPER</strong>TEC ® AC Primer for one hour before<br />
applying the second coat. Before the second coat is dry, <strong>KEMPER</strong>TEC ® NQ 0712 Natural<br />
Quartz is spread liberally (leaving no gaps) over the primer.<br />
<strong>KEMPER</strong> <strong>SYSTEM</strong> GmbH & Co. KG · Holländische Straße 32-36 · 34246 Vellmar · Germany · Tel. +49-(0)561-82950 · Fax +49-(0)561-829510<br />
www.kemper-system.com · post@kemper-system.com · Certified according to DIN EN ISO 9001:2000 and DIN EN ISO 14001
Change language