Waterproofing a metal shed roof combines two basic forms of weather protection sealing and painting.
Shed roof protection paint.
Many people recommend that waterproofing should be done immediately after installing a metal shed roof.
Painters tape plastic paintable caulking stepladder mask or respirator safety glasses or face shield cleaning rags paint sprayer 1 brush 4 brush roller and tray extension pole primer or paint primer mix paint.
Just make sure when you buy the treatment that it is the type that you can apply paint to afterward otherwise any paint you add will just slide off.
There are many options available including paints stains and varnish depending on the look that you want to achieve the type of material and the level of protection that you require.
Black jack eterna kote 4 75 gallon silicone reflective roof coating lifetime warranty item 484330.
For pricing and availability.
Black jack elasto kool 1000 5 gallon elastomeric reflective roof coating 10 year limited warranty item 139941.
Depending on the size of the shed and your painting abilities you can use either a brush roller or a spray gun for paint application.
Acrylic latex paint can withstand weather conditions and works well for wood shed exteriors.
However most of the metal shed rood manufacturers tend to include some coatings of weatherproofing.
If you plan to use rollers make sure that you have a brush to help even out the edges.