Curbside Solidification & Hazardous Coatings
Latex vs. Oil Paint Disposal Guide
Every year, millions of half-empty paint cans sit forgotten in garages. Here is how to dry out water-based latex paint with cheap kitty litter for regular trash pickup, and where to take solvent-based paints safely.
Latex and acrylic water-based paints are non-hazardous once completely dried out. Pour equal parts clay cat litter or commercial paint hardener into the can, stir thoroughly, and allow it to solidify into a firm block within 24 to 48 hours.
Oil-based paints, alkyd enamels, stains, and varnishes contain volatile solvents. They cannot be thrown into curbside trash under any circumstances, even if dried out. Take oil-based paints to an authorized hazardous waste drop-off.
When placing dried latex paint cans in curbside garbage carts, remove the metal lids completely and place lids beside the can. Sanitation drivers must visually confirm that the paint is completely solid before hauling.
If a paint can has only a paper-thin dried skin at the bottom with no liquid residue, let it dry open in the sun. Dried empty steel cans can be placed in municipal scrap metal bins.
1. Open the can and pour in standard non-clumping clay cat litter or sawdust until it matches the paint level.
2. Stir thoroughly with a wooden stir stick and leave uncovered in a well-ventilated garage or patio for 24 hours.
3. Once it dries to an oatmeal-like solid consistency, set the can in your regular trash bin with the lid off.
Need full details on paint regulations? Read our dedicated paint disposal guide →
Frequently Asked Questions
Can you throw away latex paint in regular trash?▼
Yes, but only after it is completely dried into a solid state using cat litter, sawdust, or paint hardener. Liquid paint sloshes and bursts compactor hoses, spilling paint across residential roads.
How do you tell if paint is latex or oil-based?▼
Check the cleanup instructions on the back label. If clean-up requires soap and water, it is latex. If clean-up requires mineral spirits, paint thinner, or turpentine, it is oil-based.
Can you pour old paint down the drain or storm sewer?▼
No. Pouring paint down sinks ruins plumbing traps and contaminates wastewater treatment plants. Pouring into storm drains is an environmental crime subject to heavy municipal fines.
Where can I recycle leftover paint that is still good?▼
Drop off good paint at local theater groups, Habitat for Humanity ReStores, or participating PaintCare drop-off retail stores in participating states.