Please be advised Astrata Clean n
Seal take no responsibility for any person who may slip or fall upon the
surface once restored. Applying a sealer will make the surface more
"slippery" when wet. It is advisable to not seal surfaces that are
too steep, especially if the surface is a smooth texture.
"anti-slip" products available, however common sense says the
traction of vehicle tyres will pull the "anti-slip" material off
eventually. It is sometimes better to not seal these driveways.
Occasionally there are
driveway surfaces we refuse to even quote due to being too steep/smooth to
Having said that, it is
possible to slip on wet grass! Each driveway surface is different, and each owner
must weigh up the risks/benefits of applying sealer and accept the
responsibility if an accident occurs.
We have sealed over 1500
driveways and have very rarely had a client report anyone slipping on
a restored surface. One reason why is our prudent discussions with owners prior
to commencing/quoting work.
- there are other risks in resealing concrete.
Some obvious factors that
effect a sealed surfaces life are - pressure cleaning (always only clean via
low pressure hose/broom), sun exposure, slope, porosity, vehicle traffic
(trucks can cause significant damage), power steering needs to name a few.
If the surface is "spray-on-paving"
- the risk of non-adhesion or milky concrete increases compared to wet
If the surface is "smooth"
- the risk of non-adhesion or milky concrete increases compared to
"porous" wet stencil. All "stamped" concrete is
classified by us as smooth as the sealer has less area to cling to compared to
a porous stencil surface.
If the surface is already
"milky" prior to cleaning/sealing - there is a risk of it
returning later. Milky concrete can be a result of concrete having been sealed
when the concrete is too wet. If the "milky" sealer is sufficiently
broken down over time - in some cases it is possible to pressure clean MOST of
the residual failed sealer off and re-seal with heavy acetone/xylene/MEK
solvent combinations in the first coat. Each driveway is very different, and
the risks/rewards must be weighed up by the customer.
If the surface is being
re-coloured - the above applies.
The ideal surface to re-seal
or re-colour is one that is reasonably flat, very "rough/porous", has
very little residual sealer, no "milkiness" and minimal power
steering needs. However, in reality most surfaces don't fit this
"ideal", so we do the best we can to minimise risk.
In summary, Astrata Clean n
Seal can only reseal or recolour the existing surface texture and minimise
risk. Usually there is residual sealer from a previous reseal and we cannot in
most cases know what acrylic resin was used in the previous reseal. Potentially
this could cause adhesion problems. We make extensive use of solvents - xylene,
MEK and acetone to "soften" old sealers to give the new sealer the
best chance of bonding with the old sealer.
In general, the lighter the
colour, the more porous the surface - the lower the "risks" and the
longer the longevity of the surface. We always ensure the
surface is at least 30 hrs dry, hence moisture is eliminated as a risk.
concrete is not always straight forward - each surface has risks. The
information/risks above must be taken into account by the customer before
resealing or recolouring. Astrata Clean n Seal take no responsibility for any
person who may slip or fall upon the surface once restored, or for any failed
sealer issues that could arise once the work is complete.
Having said the above - we have 21
years’ experience cleaning/sealing concrete with very very few sealer issues. A
reason why is we always convey to the customer the potential risks from the
outset. Combined with our vast sealing/solvent experience and absolute
meticulous attention to detail - we believe we are the best in the