Three new energy-saving weather-stripping products -- one for doors,one for storm windows, and one for hinged or casement-type windows -- all designed for simple do-it-yourself installation, have been introduced by the Stanley Hardware Division of the Stanley Works, New Britain, Conn. 06050. The weatherstripping for use on outside doors is made of resilient plastic that stays flexible and springy down to minus 25 F. Because it is self-sticking, no tools other than scissors are required for installation, and since it fits between the door and its jamb or the door and the stop molding, the stripping is not seen when the door is closed. A flexible fin presses against the edge or face of the door to insure an airtight seal even if there are gaps due to warping. Called the Self-Stick Door Weather Seal, it is available in white or brown, and costs $5.99 for enough to do a door up to 7 feet high and 3 feet wide.

The Self-Stick Hinged Door Window Weather Seal is made of plastic and rubber, and is designed for use an almost all hinged (casement or awning) windows. This seal is not visible when the window is closed. It costs $4.79 for a package containing 18 feet of stripping.

The third product in this line is the Storm Window Replacement Weather Seal, which is designed to replace the pile weatherstripping found as original equipment on almost all aluminum combination storm window units. As these windows age the old pile wears off or shrinks, allowing air to seep in around the edges. The new replacement seal is made of polypropylene and is easily installed in place of the old, using only a screwdrive. It comes in 40-foot rools that cost $5.99.

Instead of Sandpaper

Rasp-like hand tools that can be used instead of sandpaper, yet last almost indefinitely when used for sanding wood, are available in five different shapes, each with a comfortable molded plastic grip that makes it much easier to use than sandpaper on most jobs. Called Abraders and made by Disston Inc., Pittsburgh 15219, each has a cutting surface made of stainless steel sheets that have been etched to form sharp raised teeth over its entire surface (Disston calls them pillars).

Because these pillars are of uniform height they sand wood to a smooth finish and work equally well in all directions. They come in five shapes or models, thee with flat faces: one is almost square, one is a long rectangle like a file, and one is shaped like a small triangular trowel or spatula. The other two are round and half-round.