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That will be great....Cheers

Never used or heard of it before. I looked it up and one of it's applications is to clean algae, moss and lichen. Not sure of the cost and/or ratios and it would be interesting to see if it is an effective alternative to SH. For now I'll stick with ARMS's recommendation to clean roof shingles. But here is some info below to get you started on looking up some more info.

Applications:

The applications of Benzalkonium Chloride are extremely wide ranging,^[3] from disinfectant formulations, such as being an active ingredient in Dettol and Lysol brand products, to microbial corrosion inhibition in the oilfield sector, and a multi-surface mould, algae and moss remover.^[4] It is used in:

• Skin antiseptics Bactine to protect scrapes and cuts
• Pharmaceuticals such as throat lozenges^[5] & various leave-on skin antiseptics
• Hand sanitizers
• Preservative in pharmaceuticals and personal care products such as eye, ear and nasal drops, as a preservative
• Hygienic towelettes and wet wipes
• Cleaners for floor and hard surfaces as a disinfectant
• Soak solutions for surgical/dental instruments prior to high-level sterilisation
• Spray disinfectants for hard surface sanitisation
• Over-the-counter single-application treatments for herpes, cold-sores, and fever blisters, such as RELEEV and Viroxyn
• Algaecide for clearing of algae, moss, lichens from paths, roof tiles, swimming pools, masonry and in horticultural greenhouse disinfection

http://en.wikipedia.org/wiki/Benzalkonium_chloride

Chris, have you heard of this before?  What are your thoughts on it?

Is it a Quat?

I wonder if it is preferred over SH for indoor application. I'm doing some mold remediation in a relatives basement and the love is kicking butt but its also stinking up the whole house.