Roy’s offers the best commercial grade asphalt sealer on the market. GemSeal has been researching, developing, and specifying superior pavement preservation products for commercial and residential applications nationwide. Gemseal has proven itself as the leading manufacturer of sealers and complimentary pavement products designed to protect and prolong the safe usability of asphalt. Sealcoating benefits range from adding curb appeal to your Commercial or Residential property and prolongs the life of the asphalt, protects asphalt surfaces by slowing down the oxidation process.