Blockguard is a clear polyurethane based liquid designed to bind jointing sand & form a one coat durable seal over block paving & other mineral pavers/flags. block paving seal penetrates deeply into pavers & jointing sand & then cures by reaction with moisture & solvent evaporation to give a long lasting seal which is resistant to sunlight, water, oil, petrol & fungal/mould/weed growth. All mineral surfaces absorb water, which in time can lead to erosion of the surface & removal of jointing s&. block paving seal binds jointing sand & reduces water damage & penetration so that water 'breads up' on the surface. this action provides long-term protection & extends the life of most common patio stones/slabs/blocks/flags as well as reducing dusting & facilitating easier cleaning.
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