Advanced HD Sealant
First Coat Application
Advanced HD Sealant
Second Coat Application
After 1 week
Result after 1 week (Mid-September 2015)
March 2016
Result after 10 months (March 2016)
September 2016
Result after 14 months - end of trial - September 2016



1st coat: Thick, clear, gloop resin with very strong resinous odour

2nd coat: +1:15hrs Quite sticky when 2nd coat applied


Initially, there's an obvious change in appearance but this dissipates over the winter so that by early Spring, the stone appears natural and not 'enhanced' in any way.

By summer, it's possible to discern that the treated area is noticeably cleaner and freer of algae than the untreated section.

Could be a good choice for those looking to have the protection of a sealant without it looking overly enhanced.

Stain Trials:

stain application
Application of stains
stain after 4 hrs
Stains after 4 hours
wash off stain
Wash off stain with proprietary cleaner after 24 hrs
apply mosskiller
Apply mosskiller after wash-off
stain after cleaning
Stain 48 hrs after washing-off mosskiller and cleaning with proprietary cleaner


One of the best results from the stain trials. The four main stain attempts had more or less no effect whatsoever and all washed away with ease. If you stare for long enough, you might, just, make out a tiny shadow of a mark where the engine oil was applied, but it's so insignificant, no-one would ever notice in a real-life situation. And even the mosskiller seems to have had no effect at all.

Got to be considered a serious contender!

Note: Any apparent variation in colour of the flagstone is due solely to changes in the condition of the natural daylight at the time the photograph was taken.

Other than cropping to exclude extraneous background and adding a drop shadow to the cropped image, there has been NO post-processing of the original photographs.


Advanced HD Sealant is available from:

Advanced Sealing Solutions

Advanced HD Sealant
Advanced HD Sealant

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