Technical Datasheet One-component, rapid-curing, polyurethane, liquid waterproofing membrane for flat roofs. Based on elastomeric, hydrophobic polyurethane resins, ISOFLEX PU 500 A features excellent mechanical, chemical, thermal and weather resistance. Thanks to its unique formulation, it cures rapidly to form a thick, bubble-free membrane. It offers the following properties: • Forms a continuous, elastic, waterproof, vapor-permeable layer, without seams or joints. • Shows excellent adhesion to various substrates, such as concrete, cement mortars, wood and most waterproofing layers. • Applicable even on irregular substrates and at low temperatures. • Maximum consumption can be achieved in only one coat reducing labor costs. • The membrane becomes quickly rainproof. Certified according to EN 1504-2 and classified as a coating for surface protection of concrete. CE marked. Certificate No.: 2032-CPR-10.11D. In addition, the product has been checked according to the requirements of ETAG-005 and is classified as: W3, S, TL4-TH4, P4 special, which means that its expected working life is 25 years under the worst control conditions specified in this standard concerning user loads (P4), the climatic zone (S) and the resistance to maximum and minimum service temperatures (TL4-TH4). ISOFLEX-PU 500 A is certified as root-resistant, according to UNE CEN/TS 14416 EX: 2014. ISOFLEX-PU 500 A is suitable for waterproofing: • Roofs, flat roofs and balconies, as exposed waterproofing membrane. • Gypsum and cement boards. • Under tile layers in kitchens, bathrooms, balconies and flat roofs, as long as quartz sand has been broadcast on its last layer. • Under thermal insulation boards on flat roofs. • In construction works, such as highways, bridge decks, tunnels, etc. • Foundations. • Old layers of bituminous or EPDM membranes. • Polyurethane foam. • Metal surfaces. 2. Properties of the cured membrane Elongation at break: > 300% (EN-ISO 527) Hardness according to SHORE A: 60 ± 2 Solar Reflectance Index: 107 According to ETAG-005: Expected working life: W3 (25 years) Climatic zone: S (Severe)

Minimum surface temperature: Maximum surface temperature: Service temperature: User load: (EN 1542, requirement for flexible systems with no traffic: > 0.8 N/mm2) Artificial weathering: Pass (no blistering, after 2000h) Reaction to fire: Euroclass F 1. Substrate preparation In general, the substrate must be dry (moisture content < 4%) and free of grease, loose particles, dust, etc. 1.1 Concrete surfaces Any existing cavities in concrete should be repaired in advance. Severe cracks in the substrate must be primed locally and after 2-3 hours (depending on the weather conditions) must be sealed...

2. Application - Consumption Before application, it is recommended to slightly stir ISOFLEX-PU 500 A, until it becomes homogeneous. Extensive stirring should be avoided though, in order to prevent air entrapment in the material. a) Total waterproofing of the surface without reinforcement ISOFLEX-PU 500 A is applied by brush or roller in two layers. The first layer is applied 2-3 hours after priming and while PRIMER-PU 100 is still tacky. The second layer should be applied crosswise after 4-5 hours (at +23°C, 50% RH). Consumption: approx. 1.00-1.50 kg/m2, depending on the substrate. b) Total waterproofing...

Volatile Organic Compounds (VOCs) According to Directive 2004/42/CE (Annex II, table A), the maximum allowed VOC content for the product subcategory j, type SB is 500 g/l (2010) for the ready-to-use product. The ready-to-use product ISOFLEX-PU 500 A contains a maximum of 500 g/l VOC. C€ _2032_ ISOMAT S.A. 17th km Thessaloniki - Ag. Athanasios P.O. BOX 1043, 570 03 Ag Athanasios, Greece 18 2032-CPR-10.11D DoP No.: ISOFLEX-PU 500A / 1858-01 EN 1504-2 Surface protection products Coating Permeability to CO2: Sd > 50m Water vapor permeability: Class I (permeable) Capillary absorption: w < 0.1 kg/m2-h0-5 Adhesion:...