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Coating Spalled and Leached |
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| EPDM LIQUID RUBBER® and PROFLEX® FLEXIBLE EPOXY | ||||||||||||||||||||||||||||||||||
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Old concrete roof decks, which have not been coated or have a deteriorated coating, will experience degradation from water leaching and spalling caused by freeze-thaw cycles. This can result in moisture penetration leading to mildew, actual leaks and reinforcing bar corrosion. This structurally weakens the concrete which will not be remedied when only a waterproofer such as Liquid Rubber® is applied. |
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Pro Guard recommends that deteriorated concrete be first reconstituted with an application of Proflex Liquid Epoxy. This will seal and strengthen the surface enabling the Liquid Rubber to be more effective as a waterproofing coating. |
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Proflex can be used alone or mixed with sand to seal and fill small as well as large surface damage. The amount required would depend on the severity of the deterioration, which could be from 1 gallon Proflex per 100 sq. ft. to 1 gallon per 50 sq. ft. |
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APPLICATION PROCEDURE |
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| Dirt, algae, organic matter, loose paint and patching cements should be removed using a dry method such as wire brushing, brooming and a propane weed burner to kill algae. Roof should be dry before proceeding. | ||||||||||||||||||||||||||||||||||
| Mix small quantities of Proflex (1 gal) and start by applying material to cracks, craters and spalled areas. Add up to 70% sand for areas requiring more filling. | ||||||||||||||||||||||||||||||||||
| Next – mix 5-gallon quantity and pour a serpentine bead onto roof starting at furthest edge from roof access. Spread this material using a rubber squeegee and roller to cover an area of 250-500square feet per 5-gallon pail. Add more product to areas absorbing the initial application until entire surface has a uniform appearance. | ||||||||||||||||||||||||||||||||||
| Allow an overnight cure. | ||||||||||||||||||||||||||||||||||
| Liquid Rubber may be applied even if Proflex is slightly tacky. Spread rubber at a rate of 40 square feet per gallon. | ||||||||||||||||||||||||||||||||||
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The above-described procedure will result in an average coating thickness of 40 mils (equivalent to 10 sheets of copy paper).
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Click here to Order EPDM Liquid Rubber.
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