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Polyurethane based » PU-AL TOP » PU-AL TOP



    (Aliphatic Polyurethane Top-Coat, UV-stable Domestic pedestrian traffic areas)


The PU – AL TOP is a pigmented, color- and UV-stable, highly permanent elastic, cold applied and cold curing, one component aliphatic polyurethane coating, used as a top-coat for protection over exposed, polyurethane waterproofing coatings.
Cures by reaction with ground and air moisture over a unique moisture triggered chemical reaction.
Protects very efficiently, if a final color is desired especially if we want to create reflective surface.

- Simple application (roller or airless spray).
- One component.
- Increases the abrasion and wear resistance of the waterproofing membrane underneath.
- UV and Color stable.
- Gives a glossy and easy-to-clean surface.
- Does not show the chalking effect of aromatic polyurethane coatings.
- Resistant to water, heat and frost.
- Maintains its mechanical properties over a temperature span of   -40oC to +90oC.
- The waterproofed surface can be walked on (domestic pedestrian traffic).

- Waterproofing of Roofs
- Waterproofing of Balconies, Terraces and Verandas
- Waterproofing of Pedestrian Decks and Walkways
- Protection of Polyurethane Foam Insulation

Used over the HYDROBLOCK on surfaces, with domestic pedestrian traffic (e.g. Roofs, Terraces, Residential Walkways) that require a glossy, color - stable and non - chalking finish.

Technical Data: 

1 Composition Pigmented Aliphatic moisture triggered Polyurethane polymer. Solvent based Specs / Internal Laboratory
2 Resistance to Water Pressure No Leak DIN EN 1928
3 Elongation at break 289% DIN EN ISO 527
4 Tensile strength 3,72  Ν/mm2 DIN EN ISO 527
5 Elongation at break after 2000h of accelerated aging (DIN EN ISO 4892-3, 400 MJ/m2) 372  % DIN EN ISO 527
6 Tensile strength after 2000h  of accelerated aging
 (DIN EN ISO 4892-3, 400 MJ/m2)
2,68 Ν/mm2 DIN EN ISO 527
7 Gloss retention after 2000h of accelerated aging
(DIN EN ISO 4892-3, 400 MJ/m2)
Good DIN 67530
8 Surface chalking after 2000h of accelerated aging
(DIN EN ISO 4892-3, 400 MJ/m2)

No chalking observed.

Chalking grade 0

DIN EN ISO 4628-6
9 Adhesion over HYDROBLOCK lv >2 N/mm 2 ASTM D 903
10 Hardness (Shore A Scale) 65 ASTM D 2240 (15”)
11 Solar Reflectance (SR) (white color) 93.5% ASTM E903-96
12 UV accelerated ageing, in the presence of moisture Passed - No significant changes EOTA TR-010
13 Hydrolysis (5% KOH, 7days cycle) No significant elastomeric change Internal Laboratory
14 Service Temperature -40oC / +90oC Internal Laboratory
15 Tack Free Time 1-3 hours Conditions: 20oC, 50% RH
16 Light Pedestrian Traffic Time 13 hours
17 Final Curing time 7 days
18 Chemical Properties Good resistance against acidic and alkali solutions (5%), detergents, seawater and oils.  

Surface Preparation:

Careful surface preparation is essential for optimum finish and durability.
The surface needs to be clean, dry and sound, free of any contamination, which may harmfully affect the adhesion of the membrane. Maximum moisture content should not exceed 5%. Substrate compressive strength should be at least 25MPa, cohesive bond strength at least 1.5MPa. New concrete structures need to dry for at least 28 days. Old, loose coatings, dirt, fats, oils, organic substances and dust need to be removed by a grinding machine. Possible surface irregularities need to be smoothened. Any loose surface pieces and grinding dust need to be thoroughly removed.
WARNING: Do not wash surface with water before application!

Waterproofing membrane:  See relevant AV.IP HYDROBLOCK Technical Data Sheet.
Top-Coat:    Stir PU – AL TOP well before using.
Apply the PU – AL TOP by roller or airless spray in one or two layers. Allow 3-6 hours (not more than 36 hours) to cure, between the two layers. For best results, the temperature during application and cure should be between 5oC and 35oC.  Low temperatures retard cure while high temperature speed up curing.  High humidity may affect the final finish.
WARNING: The PU – AL TOP is slippery when wet. In order to avoid slipperiness during wet days, sprinkle suitable aggregates onto the still wet coating to create an anti-slip surface. Please contact our department for more details. WARNING: If on the surface where the AV.IP system is applied, there are areas with ponding water, they should be cleaned on regular basis to avoid biological and microbial attack.

150-250 gr/m2 in one or two layers.  This coverage is based on practical application by roller onto a smooth surface in optimum conditions. Factors like surface porosity, temperature, humidity, application method and finish required can alter consumption.

Packaging - Colors:
PU – AL TOP is supplied in 20 kg, 10 kg and 5 kg metal pails. Pails should be stored in dry and cool rooms for up to 9 months. Protect the material against moisture and direct sunlight. Storage temperature: 5o-30oC.  Products should remain in their original, unopened containers, bearing the manufacturers name, product designation, batch number and application precaution labels.
The PU – AL TOP is supplied in white, light grey and red.
Other RAL colors may be supplied on demand.

Safety measures:
PU – AL TOP contains isocyanates. See info supplied by manufacturer. Study the material safety data sheet
(M.S.D.S.)   -  FOR Professional use only!



Note for users:
The information contained in the present sheet are based on our own knowledge on the date of the last version. Users must verify the suitability and thoroughness of provided information according to each specific use of the product. This document must not be regarded as a guarantee on any specific product property. The use of this product is not subject to our direct control; therefore, users must, under their own responsibility, comply with the current health and safety laws and regulations. The producer is relieved from any liability arising from improper uses.

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