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It seems there are almost as many different types of paving sealants as there are types of paving and it
can be totally confusing to decide which is the most suitable for any particular type of paver. The situation
is not helped by some manufacturers claiming that their brand is suitable for any paving type, in any
situation. Bear in mind the old adage regarding the inappropriateness of jack-of-all-trades.
Sealants can have a dramatic effect on the appearance of a pavement, and that effect may well be
permanent and irreversible. That's why all sealants should be tried out in a discreet corner or on surplus
paving before applying it to a wider area.
There definitely are sealants that perform better with one form of paving or another, and there are a
worrying number of concoctions that are potential paving despoilers. Sadly, the manufacturers of these snake oils are overly concerned with making empty promises about the panacea their product will deliver and fail to draw attention to the various shortcomings of their infernal compound.
Any attempt to sort the multitude of sealants into appropriate categories would turn into a long and boring chemical analysis. There are polyurethanes (PU), acrylics, 1- and 2-part epoxy resins, fluoropolymers,
silanes, siloxanes, waxes and umpteen more. While it may sometimes be possible to identify a
most-appropriate chemical type for particular applications (such as PUs for concrete block paving),
it is not possible to definitively state that any particular chemical type is best for all pavement surfaces.