No. Properly manufactured pavers with OPT maintain the same slip resistance as untreated pavers.
No. Pavers with OPT are treated during the manufacturing process. Their natural matte appearance and rich color lasts is protected against fading, staining, and chemical damage for years without any additional sealing.
OPT is compatible with many post applied sealers, including most polyurethane, acrylic, and water based products. Applying a post applied sealer in a "belt and suspenders" approach is not necessary, but may be done if desired. Test in an inconspicuous area prior to application. Follow manufacturers instructions when using any cleaning or sealing products. We do NOT recommend use of penetrating silane/siloxane based sealers on OPTimized pavers. Silane/Siloxane sealers will not hurt the OPT treatment, but these sealers not be effective because the OPT treatment will prevent them from penetrating into the paver as they are designed to do.
Because it is applied during manufacturing and cured into the concrete matrix, OPT will not wash or wear off under light or moderate abrasion.
Efflorescence is a naturally occurring phenomenon that may affect any cement based material. Secondary efflorescence - the type that occurs after pavers are installed - can be induced by poor landscaping drainage design or incorrect installation that traps moisture. A common design flaw is pavers that are exposed to rain or frequent wet/dry cycles from sprinkler systems. If correct drainage isn't applied, moisture will collect in low areas, including on paved surfaces. In addition, many landscape fertilizers contain chemicals that contribute to efflorescence, as do certain bedding and joint sands. With so many variables, it is virtually impossible to eliminate ALL efflorescence. But by improving the quality of the paver surface and concrete matrix during production, OPT greatly reduces the occurrence of efflorescence.
No. OPT protects the surface of the pavers from potential stains caused by polymer sand.
No. The treatment is integrated into the paver, so cutting it will not damage it in any way.