Snow Joe 20-Pound 94% Pure Calcium Chloride Ice Melt Pellets – Link

Amazon has this currently available for $10.90.

• Easy to dispense: easy to dispense formula is treated with an anti-caking agent to extend shelf-life and improve spreading
• Fast-acting: formula works immediately upon contact
• Prevents build-up: pre-treating surfaces with melt prevents ice and snow build-up
• Long-lasting formula: lasts up to 24 hours and melts in sub-zero temperatures own to -25º F
• Calcium chloride: calcium chloride Pellets contain 94% calcium chloride to quickly generate heat upon contact