Powerhold 4000 Carpet Flooring Adhesive is recommended for the Direct Glue Down & Double-Bond Methods of installation with most carpet backings used in heavy commercial applications. Powerhold 4000 is an extremely aggressive adhesive which develops quick tack, for those hard to hold installations. Powerhold 4000 is an excellent choice for installing carpet with Action-Bac, latex unitary, hot melt, or Enhancer backings, in addition to the majority of carpet backings used in the market today. Powerhold 4000 can also be used in the installation of fibrous backed resilient floor covering.