The phrase "a warning sticker" is correct and usable in written English.
You can use it when referring to a label or tag that provides a caution or alert about potential hazards or important information.
Example: "Before using the machinery, make sure to read the instructions and pay attention to a warning sticker that indicates safety precautions."
Alternatives: "caution label" or "safety sticker".
The Arkansas law passed unanimously in 1983, referenced albums by The Beatles, Pink Floyd, Electric Light Orchestra, Queen and Styx, and mandated that records with backmasking include a warning sticker: "Warning: This record contains backward masking which may be perceptible at a subliminal level when the record is played forward".
The story behind THE RED DOOR (Morrow/HarperCollins, $24.99) is so sad, the book should come with a warning sticker.
Coach operator National Express has teamed up with Sustrans to produce a warning sticker pointing to the kerb side of a coach, saying, "Caution: blind spots".
A warning sticker on the back of a bottle counts for nothing when the bar is offering pints for just £1.
Blockbuster, the country's largest chain, announced that it would put a warning sticker on "Swordfish," to be released on Oct. 30.
A warning sticker, the design of which has not reached final approval, would appear on gas pumps warning of its use in older vehicles, boats and small engines like those found on lawn-care equipment.
A new California law, the first of its kind in the nation, is requiring new- and used-car dealers to check their used vehicles against a federal government database and mark them with a red warning sticker if they find a serious problem.
California requires dealers to check the new federally backed National Motor Vehicle Title Information System and use a red warning sticker if there is a serious problem.
Los Alamos spokesperson Kevin Roark says that a package arrived in Technical Area 41 late last year bearing a beryllium warning sticker.
The FDA wants to deter teenagers from using tanning beds, and officials are hoping a new warning sticker will help.
"Vehicles would be grounded for weeks or months for such minor compliance matters as an airbag warning sticker that might peel off the sun visor or an incorrect phone number printed in the owner's manual," he said when introducing the amendment.
