Jif-Set® is a fast setting gypsum based two part, powder and liquid, floor patch / underlayment used for patching, smoothing, or leveling interior subfloors prior to finish floor covering. May be used over sound above grade concrete or wood subfloors. When mixed with Leinweber’s Liquid Latex, Jif-Set® is self-bonding with a compressive strength of 2,800 psi after 7 days and 4,600 psi after 28 days. Place up to a maximum of 3/8″ per lift.