Thermacell R4 Mosquito Repellent Refill Kit - 48 Hours Coverage

The Thermacell R4 Repellent Refill Kit delivers 48 hours of effective mosquito protection across a 15-foot zone without sprays, lotions, or unpleasant odors. This complete refill package ensures continuous operation of Thermacell devices for extended outdoor activities.

What Makes This Different

Unlike traditional insect repellents that require direct skin application, the R4 system creates an invisible barrier of protection around your entire area. The heat-activated technology transforms repellent mats into an odorless vapor that mosquitoes cannot tolerate. Each fuel cartridge provides consistent 12-hour runtime with reliable ignition in various weather conditions.

Key Features

• Complete 48-hour refill kit with 4 fuel cartridges and 12 repellent mats
• 15-foot effective protection radius covers 225 square feet
• Odorless and DEET-free operation safe around food and family
• Each fuel cartridge delivers exactly 12 hours of consistent heat
• Repellent mats activate within 15 minutes of device startup
• Compatible with all Thermacell portable and lantern devices
• No batteries or electrical connection required for operation

Field testing demonstrates 98% mosquito protection effectiveness in outdoor environments including camping sites, hunting blinds, and backyard gatherings. The fuel cartridges maintain stable operation in temperatures from 50°F to 100°F with minimal performance variation. Repellent mats change from blue to white indicating proper activation and replacement timing.

Technical Specs

• Package contents: 4 fuel cartridges, 12 repellent mats
• Runtime: 12 hours per fuel cartridge, 4 hours per mat
• Coverage area: 15-foot radius (225 square feet)
• Active ingredient: Allethrin (synthetic pyrethroid)
• Operating temperature range: 50°F to 100°F
• Fuel cartridge dimensions: 1.5" x 0.75" diameter
• Mat dimensions: 1.5" x 1.5" x 0.125" thick
• Storage life: 4 years unopened in cool, dry conditions

This refill kit provides the most cost-effective way to maintain Thermacell device operation throughout mosquito season. Professional guides and military units rely on this proven technology for mission-critical insect protection.