Tremco SX300 High Performance Latex Underlayment

Tremco SX300 High Performance Latex Underlayment


SX300 is a two part general purpose smoothing underlayment for interior applications. SX300 is semi levelling and 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.

Make an enquiry

    • Short setting and cure time, facilitating fast track programs and minimising disruption

    • Protein free

    • Self-priming on most surfaces

    • 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.

    Cementitious powder and liquid latex dispersion
    Pot Life (at 20°C):
    20 minutes
    Tensile Strength:
    28 days 1.4 N/mm²
    An average thickness of 3 mm will provide a coverage rate of 5 m² per mix
    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
    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
    Full Information:
    Check out the full datasheet available in the Downloads section!

    Related Products