A "Split-Slab" parking deck, the original between-deck waterproofing had long ago failed. So that our deck coatings were not blown off from water vapor pressurization, we perforated the structural slab, thereby venting potential pressure downwards.
Water, hot and cold temperatures and automotive traction breaks-up concrete and expands the destruction of weak spots.
Embedded dirt must be removed if long-term adhesion were expected.
The walls of control joints, and spalls, are repaired using special high-strength, polymer-modified repair mortars. Regular concrete and mortar will not serve.
Polyurethane vehicular deck coatings bond tenaciously to well formulated primers. Polycoat Products' chemists are perfectionists.
Primers dry and remain "open" for about eight hours, during which the first base layer must be poured-out, squeegeed and back-rolled.
Ultra violet resistant top coats, into which non-slip surfacing is broadcast, are harder than base coats and stand up to tires and rotating pressures.
© 2018. Andrew D. Knapp