Smoke Check is a proprietary hydrocarbon blend that works by simulating the
chemical makeup of real smoke. This product was designed and introduced in 1979.
It is the original aerosol smoke detector test spray. Smoke Check™ is UL/ ULC
listed, FM approved, is complaint with NFPA 72 codes and standards, and is
approved by virtually all smoke detector manufacturers. This patented product
leaves no residue, is 100% ozone friendly and is proven to be safe when used as
directed. The active ingredient of our smoke products is used in most household
cosmetics. "Pushing the Button" only test the power supply, using 25S Smoke
Check test the sensor and power supply, in one simple step.