TRAP SEAL from Utility Mfg. Co. is a liquid that seals drain traps to prevent odors and preserve a sanitary septic seal. By ensuring that traps remain filled with liquid, it prevents sewer gases, odors, insects, and bugs from entering through the trap and endangering the health of the inhabitants. It can be used wherever odors are a problem or whenever drain traps dry out, are not in use or are in remote areas. It doesn’t restrict the flow of water or reduce the diameter of the drain. It allows water to pass through and doesn’t evaporate, freeze or go rancid. 516/997-6300; www.utilitychemicals.com.