One coat of ProJoint Porcelain Primer on the underside of a slab is all it takes to fix porcelain slabs securely. Use a roller or brush to apply and, depending on temperature and moisture, the primer will be dry within 10 -15 minutes allowing the porcelain slab to be paid within 24 hours.
Each mixing tub contains two 10kg bags of primer which should be mixed with 2.8 litres of cold, clean water each.
Approximate coverage per 20kg is roughly 21.5m2.
When laying porcelain paving a good foundation, mortar bed and jointing material are all vital.
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The underside of the paving should be clean, dry and free of any material which may impair adhesion - do not apply Porcelain Primer to shiny surfaces.
All tools should be washed with water immediately after use. Waste material should never be emptied into drainage systems.
Once laid, it takes 24 hours at least for the freshly-paved paving to dry so do not walk on it in that time. Leave for longer if possible.