For larger dents cracks or holes start by cutting out the damaged segment of siding and removing it with a zip tool.
How to repair holes or cracks in vinyl siding.
Clean the siding around the hole with vinyl siding cleaner or mild dish detergent and water and a soft sponge.
Next time you get a siding installation or repair ask your pro about contoured progressive foam insulation which fills in that gap by conforming to the style of the panels and provides support for your vinyl siding.
Cut the nozzle tip on a tube of color matched vinyl.
Wipe the siding dry with a rag.
Fill in the hole with a tinted caulk that matches your siding or opt for a paintable version.
You can mend small holes such as nail holes with exterior caulk designed to stick to vinyl.
Squirt the caulk into the hole so it fills the area behind the siding until it sticks out just a little from the front of the hole.
Repairing large holes or cracks.
To repair vinyl siding fill in minor imperfections with caulk and then paint it to match the rest of the siding once it cures.