Sika Level 525 self-leveling underlayment
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Sika Level 525 Rapid is a one-component, durable and versatile cementitious underlayment for interior concrete and cementitious substrates. It can be applied manually or by pump to produce a self-smoothing, rapid-setting, and flat substrate prior to the application of a final floor finish. Typical application thickness is 1/16″ to 1/2″ or 1.5 to 12.7 mm, or up to 1″ with aggregate.