Lichen, moss & algae remover

HydraBio

HydraBio is a spray-and-leave quaternary-ammonium concentrate for the green and black staining that builds up on roofs, render, paving and fences. Spray it on and leave it: the growth loosens and weathers away over the following weeks, without scrubbing or high pressure.

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20L concentrateQuat-based cleanerNon-DG

WARNING Concentrate is classified hazardous — read the label and SDS before use. Not a dangerous good for transport

What it's for

For roofs, render, fences and decks carrying heavy mould, algae, moss or lichen soiling — and for the lighter maintenance washes in between.

How it works

A quaternary-ammonium surfactant penetrates organic soiling and loosens its grip on the substrate. It is left on rather than rinsed, and the growth staining releases and weathers away over the following weeks.

Dilution

How to mix it

Standard1:9

Range1:14 (maintenance) to 1:7 (heavy lichen)

Coverage~200 L of working solution per drum

Always add product to water, never water to product. Test on an inconspicuous area first. Full directions and the SDS come with your first order.

Often paired with

HydraBio works alongside…

Soft-wash concentrate HydraWash

Goes in the tank with your SH and helps the mix cling to walls and roofs. Your house-and-roof workhorse.

View HydraWash SH-free oxygen bleach HydraPureSH-freeComing soon

Sodium percarbonate powder for chlorine-free soft washing. No chlorine smell.

View HydraPure

Volume pricing on HydraBio

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Volume pricing