The high-viscosity Megabubble™ leak detector allows detection of the smallest leaks, states the manufacturer. It can expose leaks of air, natural gas, refrigerants, carbon dioxide, and almost all known gases. According to the manufacturer, it produces large, bright blue, long-lasting bubbles, which cling to vertical surfaces for easier detection. It can be used in temperatures ranging from -50 to 200 degrees F. It is nontoxic, noncorrosive, and stain free when used on metal, rubber, or plastic surfaces, states the company. It comes in three sizes — an 8-ounce dauber, a 32-ounce spray, and a 1-gallon refill size.

Hercules Chemical Company Inc., 111 South St., Passaic, NJ 07055-9100; 973-778-5000; 973-777-4115 (fax); info@herchem.com (e-mail); www.herchem.com (website).