Glue Dots(R) Advanced Strength Double-Sided Sheets provide a strong, permanent bond without staining. Easily cut to any size or shape to provide adhesive coverage for projects both big and small. Ideal for tough jobs and DIY projects that require exceptional holding power. Since they're acid free and non-staining they're great for model railroading projects such as applying printed or photographic signs to signposts, billboard frames, building walls, bridges, freight cars and more without worry of drips or spills. Advanced Strength Double-Sided Sheets are also great for adhering siding sheets to base framework such as printed or plastic brick or wood wall material to a base structure, or paper shingles to rooftops. The adhesive color is amber and the sheets come in a reclosable bag for easy storage.