Madewell Permaseal Platinum is a heavy duty, moisture-tolerant epoxy coating product. The installed material resists permeation by water vapor and controls alkalinity to levels acceptable for most coatings, adhesives, and floor covering systems. Permaseal Platinum is designed for use on concrete floors in industrial and commercial construction.

Advantages of Permaseal Platinum:

  • Reduces moisture emission from 25 pounds per 1,000 square feet (or 100% relative humidity) to less than 3 pounds per 1,000 square feet overnight
  • Eliminates issues associated with alkalinity
  • Produces phenomenal adhesion strength
  • May be installed in as soon as three days after placement of the concrete

Product Detail Sheet:

Madewell Permaseal Platinum (57 KB, requires Adobe Reader)

Coating Type:

100% solids, two-component penetrating epoxy primer and sealer


Normally stocked in 4.5 gallon, two-component kits; special packaging available

Applied Thickness:

6 to 12 mils (.006" to .012") in one coat, depending on the application. Madewell 927 Primer is not designed to be a film-building product; no more than 1 or 2 mils should remain on the surface after application.


Depends on the porosity of the substrate. Rates from 250 square feet per gallon on new, dense concrete to 150 square feet per gallon on old, porous concrete have been observed.

Mix Ratio:

Mix 2 parts A to 1 part B by volume

Working Time:

Approximately 45 minutes at 70 degrees Fahrenheit