Larsen Impregnating Sealant
First Coat Application
Larsen Impregnating 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: Very thick, almost gel-like (may be old stock) Clear, petrol odour

2nd coat: Very easy coverage with noticeable resin/petrol odour


The visual appearnace has eased over the trial period to the point where it's all but invisible after 14 months but make no mistake, it' still protecting the paving and keeping it relatively clean.

Look at the difference between treated and untreated sections. No algae, no lichens and visibly brighter because the environmental dirt has been unable to establish itself.

A good, reliable, nowt-fancy performer.

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


A middling result. The wine and ink have been kept at bay, just about, but the greases (oil and fat) have definitely left their mark and it seems the mosskiller has caused the stone to discolour.

Disappointing that two common stains for stone paving, engine oil and BBQ fat, are able to find it so easy to stain the stone, otherwise this could have been a genuine 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.


Larsen Impregnating Sealant is available from:

Larsen Building Products

Larsen Impregnating Sealant
Larsen Impregnating Sealant

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