About Ready Patch™ Lite Lightweight Spackling & Patching Compound For easy, instant patching, choose Rust-Oleum® Zinsser® Ready Patch™ Lite Lightweight Spackling & Patching Compound. This professional formula is perfect for quick indoor patches and light-duty exterior ones. Professional formula lightweight patching compound Use wherever easy, super-fast patching is needed Dries quickly and sands easily Interior or light duty exterior use Shrink, sag, & crack resistant