It's important to fill all four glass unit sides.

The unique shape of Warm-Light spacer requires modifications to the desiccant filling process. The polyurethane core of Warm-Light takes the space occupied by desiccant in aluminum box spacers. As a result, all four legs of Warm-Light spacer must be filled to provide adequate desiccant. View the Testing and Standards. Complete technical bulletin - print version (PDF 164 KB)