Here’s their technical specification.
My only question is the possible adverse long term effect on the caravan sealants and plastic windows .
Clean Outside Surfaces and Remove Moss with Original Wet and Forget Cleaners
Wet & Forget has a unique combination of biodegradable selective surfactants for Moss, Mould, Lichen and Algae removal on any exterior surface. When diluted with water and applied, it immediately attacks these unsightly contaminants.
Each time it rains, this safe, cleansing combination reactivates to help flush away the Moss, Mould, Lichen and Algae without scouring the surface it has infested. Wet & Forget is a safe and effective way of removing these contaminants from ANY exterior surface. Once applied the wind and the rain will gently takes the decomposing material away bit by bit until the surface is clean.
Non caustic.
Non acidic.
No bleach.
No pressure washing.
No elbow grease.
5L concentrate makes 30L of product. No special equipment required just a good garden sprayer..
Easy to maintain, reapply at the first sign of recontamination.
UNLIMITED shelf life even when mixed with water.