About Hardwood Flooring: One of the most important questions about Engineering Hardwood Floors is what glue is inside Engineering Hardwood Floors; for Eckowood, it is the most important part in our flooring development process, together with the factory experts we test every year our glue for formaldehyde emissions, we want to make sure our customers can get full information and Transparency on technical information of our Engineering Hardwood Floors. Below is Eckowood’s recent test result.