It may be worthwhile to conduct a small trial area to accurately ascertain coverage rate as usage is very hard to calculate The Sika Setting Sand finished surface is safe to walk upon immediately after activation but ideally should be left to dry. Drying will typically take 1-2 days, but full curing may take up to 28 days depending on weather conditions. Sika Setting Sand a Moisture Curing Jointing Material For Narrow Paving Joints from 2mm to 5mm wide. None of these terms affect your legal rights and these are not diminished in any way. If any term is held to be invalid under any applicable statute or rule of law, that term is automatically omitted from the terms to minimum extent necessary to comply with the law and without affecting the validity or enforceability of the remainder.