Quicklime vs Hydrated Lime Key Differences and Uses
Quicklime is a dry, chalky white powder made by heating limestone; hydrated lime is the fine white powder you get after adding water to quicklime. Think of it as “raw” versus “ready-to-use” lime.
Homeowners often grab whichever bag is on the shelf, then wonder why their plaster sets too fast or too slow. The mix-up usually happens because both bags simply say “lime” and share similar labels.
Key Differences
Quicklime reacts violently with water, releasing heat. Hydrated lime is already combined with water, so it’s safer and easier to handle for small projects like whitewashing or garden pH control.
Which One Should You Choose?
Pick quicklime for big industrial jobs where speed matters. Choose hydrated lime for household DIY tasks—it’s ready to mix, less hazardous, and sold at most hardware stores.
Can I swap them in a recipe?
No. The reaction rates differ, so substituting one for the other can ruin the mix.
Are both safe to handle?
Hydrated lime is gentler on skin; quicklime needs gloves and goggles.