Description
ALSAN TRAFIK PU 221 is a two-component polyurethane waterproofing membrane.
Material Use:
ALSAN TRAFIK PU 221 is a two-component, 100%-solids, VOC-free, and odourless polyurethane waterproofing membrane. It is specifically designed for use in vehicular traffic-bearing waterproofing systems such as the ALSAN TRAFIK parking systems and the ALSAN DECK 220 system. This product is compliant with CSA S413-07 (ASTM C957) standards for parking structures, making it ideal for concrete parking decks and similar high-traffic surfaces requiring durable waterproofing.
System Components:
ALSAN TRAFIK PU 221 is used as part of a multi-layer waterproofing system. It is typically applied over a properly prepared and primed concrete substrate. The system may include:
- Primer: Required if the substrate does not meet all surface preparation criteria. Specific primer type is not listed in the TDS, but SOPREMA primers compatible with polyurethane membranes should be used.
- Base Coat: ALSAN TRAFIK PU 221 acts as the base waterproofing membrane.
- Top Coat (if applicable): Depending on the system (e.g., ALSAN TRAFIK or ALSAN DECK 220), a wear coat or traffic coat may be applied over ALSAN TRAFIK PU 221 for added durability and UV resistance.
Applications:
ALSAN TRAFIK PU 221 is intended for use on concrete substrates in parking structures, including:
- Parking decks
- Ramps
- Drive lanes
- Exposed concrete surfaces requiring waterproofing and crack-bridging performance
Application Details:
- Surface Preparation: Concrete must be fully cured (minimum 28 days), with a compressive strength of at least 24 MPa (3500 psi) and a moisture content ≤ 4% (measured with a TRAMEX meter per ASTM F2659). Surface profile should be ICRI CSP 3 or 4, typically achieved by shot blasting. Cracks >1.6 mm (1/16 in) must be repaired using SOPRASEAL SEALANT.
- Mixing Ratio: Part A to Part B = 5:2 by volume. Mix each part separately for 2–3 minutes, then combine and mix for another 2–3 minutes until homogeneous.
- Application Method: Apply using a 3/16 in (4.7 mm) serrated squeegee, then back-roll to level. Minimum wet film thickness is 635 µm (25 mils), at which point the product becomes fully opaque.
- Coverage: At 25 mils, coverage is approximately 59 ft²/US gal or 29.3 m² (315 ft²) per full kit (18.6 L / 4.9 US gal).
- Pot Life: 1 hour at 25 °C (77 °F)
- Curing Time: Fully cured in 8 hours at 22 °C (72 °F) and 50% RH
- Minimum Application Temperature: 10 °C (50 °F) must be maintained throughout curing
- UV Resistance: Not specified as UV stable; a UV-resistant topcoat may be required for exposed applications
- Thickness Limits: Minimum application thickness is 635 µm (25 mils). No maximum thickness is specified, but uniform application is critical.
- Cleaning: Tools can be cleaned with petroleum solvents such as mineral spirits or xylene.
Special Notes:
- ALSAN TRAFIK PU 221 must not be applied without a primer unless all substrate preparation conditions are strictly met.
- A test patch (1 m x 1 m) is required before full application to verify adhesion and compatibility.
- The product must be stored above 10 °C (50 °F) and protected from heat, humidity, and direct sunlight. Shelf life is 12 months in unopened containers.
- This product is not UV stable on its own; for exposed applications, a UV-resistant topcoat is recommended.
- Due to its 100% solids formulation, ALSAN TRAFIK PU 221 offers excellent crack-bridging, elongation, and water resistance, making it suitable for high-performance waterproofing in vehicular traffic areas.
This material is best used as part of a complete SOPREMA ALSAN TRAFIK or ALSAN DECK 220 system, where it functions as the primary waterproofing membrane beneath a wear-resistant topcoat.
https://www.soprema.ca/en/products-systems/alsan-trafik-pu-221
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