VAPOR/WATER BARRIER COVER FOR EXTERIOR FIXTURE BOXES Designed for exterior fixture boxes, Arlington's vapor/water barrier cover prevents water and air from entering around a box installed on exterior sheathing, without the need for caulking - or a gasket. It saves time and money. Easy to install, the flashing mounts over the installed box. FR410F comes with two rings for use on a pan box or a deeper octagon box. Step 1.) Step 2.) Step 3.) Step 4.) Step 5.) Place flashing backing over box. Attach flashing backing to sheathing through flashed-over holes. Using two supplied #8-32 screws, temporarily attach appropriate box flange to installed box. FR410F comes with two box flanges; one for a pan box, the other for an octagonal box. Remove temporary #8-32 screws and install fixture mounting hardware to installed box per fixture manufacturer's instructions. Installed fixture. ELECTRICAL INDUS TRY CANADA VOLUME 1, ISSUE 3 15http://aifittings.com/landing/fr410f http://aifittings.com/landing/fr410f