Carefully scrape, clean and remove any and all old caulking and sealants around all windows, doors, compartments, nose, rear, etc. Wipe surface with thinner to remove any caulk residue. Clean with isopropyl alcohol/water mix and dry thoroughly. Neatly apply Clear Bio-Seal 100% Silicone Caulk, 50 -Year Protection. Shrink and crack proof, non-yellowing and smooth out. Costs average $ 125.00 per hour labor plus caulking