Polyurethane based coatings for balcony flooring give humidity no chance

When it comes to providing reliable abrasion resistance and weather protection to concrete floors or tiled areas on balconies and terraces the use of polyurethane coatings could be the solution for both new developments and renovation projects. The properties of these coatings are:

• Outstanding weather resistance
• Waterproof
• Very low abrasion
• Surface design options, e.g. slip resistance
• Compatibility with colorants

When formulated with Desmodur and Desmophen raw materials, polyurethane coatings help to preserve for the appearance of the coated floors for many years, and ensure that the surfaces remain sealed. Above all, their highly elastic character, even at very low temperatures, prevents the ingress of water into the structure. Upstands and drainages remain tightly bound into the waterproofing membrane.

Typical build-up of balcony and external concrete floor sealing:

New building

Renovation

Examples of products for balcony floor coatings:

	Type	Solids in %	% NCO or OH on solids	Viskosity mPas at 23°C	Characteristics
Desmodur® XP 2406	Aliphatic polyisocyanate prepolymer	80	3.5 NCO	7000	Systems with very good storage stability and blister-free films, flexible also at low temperatures.
Desmodur® N 3900	Aliphatic HDI- polyisocyanate	100	23.5 NCO	730	Hardener for weather-stable coating systems, and to formulate high-solids systems
Desmodur® N 3600	Aliphatic HDI-trimer	100	23.0 NCO	1200	As hardener component for flexible, lightfast (also two-component) polyurethane coating systems, with high resistance to chemicals and weathering, very high gloss and outstanding mechanical properties.
Desmodur® Z 4470 BA	Aliphatic IPDI-trimer	70	17.0 NCO	600	Hard, high gloss, good chemical and weather resistance, lightfast, high mechanical resistance, for mixing with Desmodur® N
Desmocap® 11	Blocked TDI polyisocyanate prepolymer	100	2.4 bl.NCO	100000	Desmocap® 11 can be used to formulate curable, liquid, solvent-free polyurethane systems.
Hardener VP LS 2959	Urethane bisoxazolidine	100	330 (NH-Equivalent)	3000	For formulations, which cure bubble-free and homogeneously at ambient temperature, even with thick films
Desmophen® 1150	Polyester polyether polyol	100	4.7 OH	3500	Abrasion resistant, good chemical resistance
Desmophen® VP LS 2249/1	Branched polyester polyol	100	4.7 OH	1900	As polyol component in weather-stable systems, for formulations of hard coatings, sealing compounds and mortas

A sample starting formulation:

RR 5614

Two-component epoxy/polyurethane sealing to be applied under ceramic tiles (Desmocap® 11)