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Wekcome to Laykold
to Laykold, the official tennis court surface of the MIAMI OPEN (formerly the Sony Open). Laykold is the trademark of Advanced Polymer Technology Group (APT), leading manufacturer of advanced surfacing materials for sports and industry surface systems. With two ISO-certified manufacturing facilities and four global sales offices the APT Group services the needs of the construction and chemical industries worldwide.

APT utilizes its ISO 9001 Quality Management System and ISO 14001 Environmental Management System to constantly review and improve its business procedures. One of the driving forces for APT to implement an ISO 9001 system was and still is to support its ongoing global expansion and product diversification.