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SX300 NA is a two part general purpose smoothing underlayment for interior applications.
Usage/Purpose
SX300 NA is specifically designed for the preparation and smoothing of interior subfloors prior to the application of a liquid applied damp proof membrane and receiving a floor covering.
- Water resistant: can be used for pre-smoothing
- Excellent adhesion to a wide range of common flooring substrates, including: concrete, sand/cement screeds, flooring grade asphalt, TREMCO surface DPM’s, etc.
- Self priming on most surfaces
- Short setting and cure time, facilitating fast track programs and minimising disruption
- Low odour
- Protein free
Preparation
- Ensure all surfaces to be coated are clean, dry, frost free and free from grease, oil, dirt, dust, loose friable material and any other contaminants (coating, laitance, etc).
- Any surface hardener or curing compounds should be thoroughly removed prior to the application of SX300 NA. For full details of surface preparation contact tremco illbruck Technical Services.
Priming
In some case it may be necessary to prime with CS150 Acrylic Primer for porous substrates or CS100 Epoxy Primer for non-porous substrates. Always check with the tremco illbruck Technical Services.
Mixing
Gradually add Part A to Part B, continually mixing with a slow speed drill and paddle. Mix the contents for 2 - 3 minutes to obtain uniformity in colour and consistency.
Application
SX300 NA should be applied directly after mixing by pouring a ribbon of material along the wet edge and then trowelled to form a smooth, even finish. The effective use of spike rolling can reduce visible trowel marks.
Protection on Completion
Ensure the screed is not subject to draughts during the first 6 hours of curing as this may lead to cracking and crazing. Tape up doorways with polythene to prevent air movement.
Prevent contamination by following trades (e.g. plastering), including water spillage.
Technical data
| PROPERTY | RESULT |
|---|---|
| Composition | Cementitious powder and liquid latex dispersion |
| Pot Life (at 20°C) | 20 minutes |
| Compressive Strength | After 28 days approx. 21.9 N/mm² |
| Tensile Strength | 28 days 1.4 N/mm² |
| Coverage | Thicknesses of 6 mm to feather edge can be applied dependant on surface profile. An average thickness of 3 mm will provide a coverage rate of 5 m² per mix Thicknesses of 8 mm to 30 mm can be achieved by incorporating an equal volume of 3 mm granite chippings This will depend on the condition of the substrate and method of preparation (please refer to tremco illbruck Technical Department) |
| Cure Time (at 20°C) | Between 2 - 4 hours for foot traffic and 8 - 12 hours for application of damp proof membrane, floor covering and loading |
| Storage | Store in dry, shaded conditions between +10°C and +35°C |
| Shelf Life | 6 months when stored as recommended in original unopened packaging High temperatures and humidity will lead to a reduced shelf life |
