Silsan® FC 624 is an aqueous emulsion of a solvent-free, water and oil repellent impregnating agent based on a modern PFOA and PFOS-free C6-flourides, silsanes and siloxanes.  Silsan® FC 624 is suitable for impregnating alkaline building materials such as natural and artificial stones.

Silsan® FC 624 provides complete protection of brickwork and facades.  Due to its stain release properties, the substrates stay dry and clean.

Silsan® FC 624 provides a reliable and long-lasting protection for brickwork and façade against water intrusion, efflorescence and destruction by water-soluble pollutants as well as against frost damage and the attack of micro-organism.

Silsan® FC 624 accentuates the natural colour shade of the treated material.  There is no significant change to the physical properties, in particular the water vapour permeability, (sd value) of the substrate treated with Silsan® FC 624.

£38.50 exc. VAT

National Delivery

Please see our delivery details and minimum order quantities listed below.


Before application, Silsan® FC 624 is diluted with 4 litres of clean tap water (1:10)

Silsan® FC 624 can be applied by use of rollers, by painting, flooding or airless spraying.

The product must be fully absorbed into the substrate without leaving a residual film after 2-4 hours.

 Feel free to click on the link below to download our product information.
  Silsan Data Sheet

We can deliver to the whole of the UK. Silsan is delivered in a small box via APC.

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"Thanks,, I'm fully converted now 👍 won't be using lime putty for a while that's for sure, much better finish compared to what I've been using for the past 8 years or so, and peace of mind that it doesn't crack, lighter, less mess, no binding in needed.

I was also pleasantly surprised about how far it goes per bag 👍 definitely a game changer for me, will be back next week sometime for some more."

John Thompson
Limelight Restoration
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"Used their product Patchcote on my timber framed house for some repairs.

Really easy to mix, apply and finish.

Left-over product was just as pliable 3 days later, it can be left sealed inside the container supplied, after mixing, for up to a year!

Best product I’ve worked with!!"

Geoff Morland
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"Limecote and Warmcote are ideal products for use on timber framed buildings and low strength substrates with their excellent flexibility, bond, and light weight compared to sanded plasters. Being dry bagged makes it easy to transport and store, with the added advantage of being able to adjust the mix to suit thin or very thick coats without compromising the product, or the quality of the finished work."

Roy Cafferty
Traditional Plastering Services

Why choose Best of Lime?

The Best of Lime materials
At Best of Lime, our traditional lime plaster products are developed under the strict rule that they must be the best of what is available. We continuously listen to and evaluate feedback from specifiers and contractors as to how certain materials perform, both on site and long term.
Our lime plasters, manufactured by us on site in rural East Anglia, are sustainable, environmentally friendly building materials which tick all the requisite conservation and green boxes. We have yet to find anything that they won't stick to, including bricks, wooden lath, straw bale, and stone.
Get in touch
For any enquiries please contact Best of Lime on 01440 848200 or email Alternatively, click the button below and we'll get back to you as soon as possible.
Contact Us
Contact Us
Unit A | The Brocks Business Centre
Homefield Road | Haverhill
Suffolk | CB9 8QP
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