Believe it or not but i have used a concentrated mix of white sugar in water to safely remove light spatters of concrete from various materials including vinyl.
Temoving concrete splatter from siding.
To improve the efficiency of concrete dissolvers consider adding water to area being addressed.
Dribble the sugar solution onto the concrete spatters or use a rubber spatula to smear it on.
How to remove concrete splatter from vinyl siding.
For areas with a large amount of splatter using a putty knife may.
It s safe for vinyl but your siding may not be 100.
You can also do a search for concrete dissolver on the net and you will find some commercially prepared mixes for concrete removal that are 100 biodegradable.
If the concrete does splatter try to remove or clean it as quickly as possible before it hardens.
Mix one part acid with three parts water.
Old or hardened concrete splatter fill a spray bottle with water and mix about 2 to 3 drops of dish soap into it.
Pour some sugar in a small bowl and add enough water to make a thin paste.
Chip away small chunks of concrete from your siding with a putty knife.
Spray the window to help lubricate the glass and to prevent scratches.
How to remove concrete spatter from aluminum.
Put on goggles and rubber gloves to protect yourself from the corrosive effects of muriatic acid.
Mix one part water and one part sugar and apply it to thick concrete splatters.
Test the acid solution before using it.