James Janssen
Vice President
James has over 20 years of sealcoating experience. He was an owner operator of his own sealcoating business for 5 years and knows the sealcoating business inside and out.
About
Who we are
A full-service asphalt maintenance company based in north San Diego County, serving all of California.
What we do
SEALCO specializes in asphalt, concrete, crack filling, sealcoating, color coatings, and striping, and is one of the select few certified applicators of the Liquid Road product. Our sister company, Marathon General, Inc., is a general engineering contractor with over 30 years in Southern California. Sealco uses only the highest quality asphalt sealants on the market.
Our mission
To provide high-quality, cost-effective asphalt maintenance to our customers. We are dedicated to maintaining the integrity and appearance of our clients' asphalt through professional expertise and the best available materials and equipment. We are committed to safety, sustainability, and excellent customer service, and we strive to exceed expectations on every project. We aim to be a trusted partner for all our clients' asphalt maintenance needs and to contribute to the long-term value and function of their properties.
Meet the team
The people who answer the phone, walk the site, and run the crews.
David Constantino
Estimator
David has over 5 years of hands-on expertise bidding asphalt paving, concrete work, and asphalt sealing projects across California, from San Ysidro to Visalia. A former Air Force JROTC Cadet Staff Sergeant, he brings discipline, precision, and dedication to every project.
Johnny Magbanua
Sales Manager
Johnny is a United States Air Force veteran with several years of experience in facility management and has seen the job from the inside and out. He prides himself on integrity first, service before self, and excellence in customer satisfaction.
Cindy Parsley
Office Manager
Cindy has over 30 years of office experience including 8 years in management. She studied accounting and business management at Palomar College and prides herself on excellent customer service.
License
Sealco, Inc. California contractor license #1139714.
Service area
All of California, from San Ysidro to Visalia and beyond.
Insurance
Certificates of liability and workers' compensation insurance are available upon request.