Sand and Cement Mortar Mix Bag: 55 lbs. (24.9 kg)
4 to 1 is a preblended mixture of finely graded sand and Portland cement used for thick-bed mortar
installations. 4 to 1 flattens and levels an existing substrate before the installation of tile and stone.
Product info Technical Data Sheet
WHERE TO USE
▪ Floating shower bases
▪ Can be directly bonded or used as a detached floating mortar bed over a cleavage membrane or
waterproofing membrane
▪ For use in both residential and commercial applications in dry and wet areas
▪ Mixes with water. For increased performance and reduced porosity, mix with MAPEI’s Planicrete AC latex
admixture.
LIMITATIONS
▪ 4 to 1 can be mixed with water for most interior conditions. For better performance or for exterior or heavyduty wet areas, mix 4 to 1 with Planicrete AC instead of with water. For details, see the Technical Data Sheet
for Planicrete AC.
▪ See ANSI A108.1 industry standard for details on mortar bed installations.
▪ For direct-bond applications, the concrete surface should have a concrete surface profile (CSP) of at least #3.
The surface must be primed with a slurry bond coat mixture (see the “Mixing” section below for details).
