Fillets are thin picture frame spacers placed around the perimeter of the frame to prevent the glazing from coming in contact with your painting, photo, or other visual artifact, to protect it from potential damage. Some folks call them art glass separators. Our fillets may be used with both acrylic and glass glazing, and are sized for installation with box lap joints (see illustration). In addition to lightweight fillets, we also make acrylic frame spacers and aluminum channel fillets for very large frames.
Lightweight fillets for aluminum picture frames are fully archival and, as you might expect, very lightweight. They can be attached to the frame using your own epoxies, adhesive transfer tape or silicone. The material is powdercoated aluminum facing on a foam/plastic core, finished in any of our standard powdercoat colors (typically they’re finished to match the frame). Standard thicknesses are 1/4”, 9/16”, 13/16”, and all fillets are trimmed to fit your frame and artwork. The minimum lightweight fillet depth is 3/8”.
Why use fillets? Without spacers, the image can buckle or get stuck to the glazing, causing damage and making it difficult to reframe your art in the future. And, if moisture should make its way under the glazing, fillets allow air circulation, thus reducing the chance that destructive mold and mildew will form.