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SEALCO, Marathon General's asphalt maintenance division, is the premier choice for all your pavement needs throughout California. Our team of experts specializes in a wide range of services including asphalt and concrete repair, crack filling, sealcoating, color coating, and striping.

At SEALCO, we take pride in using only the best equipment and materials- such as the top-of-the-line SLATEWORKS sealcoat - to ensure our work exceeds industry standards. We are committed to honesty, integrity, quality, and most importantly, to complete customer satisfaction. Wherever you are located, SEALCO keeps your pavement in top condition and looking great for years to come.


SLATEWORKS, Marathon General's sealcoat manufacturing division, is an exciting entry in the sealcoat manufacturing industry. Our newly commissioned facility has been engineered from the ground up to be an example of best industry practices - from raw material testing and handling, to manufacturing facilities, procedures, and quality control, to storage, maintenance, and distribution, no stone has been left unturned in our ongoing pursuit of excellence!

Proudly manufactured in California, SLATEWORKS sealcoats are among the first rank of all asphalt sealants nation-wide. SLATEWORKS sealcoat products provide best-in-class characteristics for wear, durability, adhesion, color, texture, and ease of application - all, at a superior price point!

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