About Us

Phildev Synthetic Industries, Inc. is a leading Philippine manufacturer specializing in the fabrication of innovative plastic-based building materials. Marketed under the flagship brand Stalwart®, the company is a pioneer in disruptive construction products aimed at superseding inefficient traditional market alternatives. The company is committed to quality, innovation, and sustainability to help refine outdated construction practices in the Philippines.

COMPANY CORE VALUES

At Stalwart® our set of core values define who we are, represent what we stand for, and how we operate. Our decisions and actions are guided by these set of core values which in principle keeps us aligned with what we firmly believe in and keeps us grounded no matter how far we go in the future. Our commitment to these values sets the foundation for a culture of excellence and innovation.

01 Integrity:

We uphold the highest ethical standards in all our transactions and interactions. Honesty, Transparency, Accountability, Always.

02 Innovation:

We highly encourage creativity by thinking outside the box, continuously improving current processes, seeking ways to progress, learn and growth towards the right direction.

03 Collaboration:

The essence of national progress is inclusive development. Thus, we believe in order to get there, everyone plays a vital role, which essentially starts within the team, learning to work together to achieve a common goal.

History & Journey

The company traces its roots back to late 1980's initially as a humble family business engaged in the manufacturing of a wide array of plastic consumer products such as polybags & twines.

1980s

1988: Plastic Consumer Goods Mfg.

Started as a small company producing plastic bags, twines, and other consumer products.

1980s

1990s

1994: Importing-Trading & Mfg.

Engaged in the import-trading of plastic virgin raw materials and post-industrial plastic wastes for various manufacturers.

1990s

2010s

2017: Plastic Pipe Manufacturing

Ventured into producing plastic piping products, including Waterline, Sanitary, Electrical Conduits, HDPE, and PP-R piping.

2010s

2020s

2022: Stalwart - PSII

Phildev Synthetic Industries, Inc. was officially founded, and the Stalwart® brand was born.

2020s

INNOTECH is a flagship brand specializing in high-quality, large-diameter structured wall HDPE (PE100) subsoil drainage piping systems. Manufactured using state-of-the-art production lines, these systems serve as a modern, efficient alternative to traditional Reinforced Concrete Pipe (RCP) across commercial, residential, industrial, and institutional sectors. The brand offers significant value to clients by reducing labor and equipment costs, shortening installation times, and increasing overall project efficiency. Currently, the product line features two primary variations: the HDPE Hollow Wall Spiral Pipe and the HDPE Double Wall Corrugated Pipe.

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POLYFLEX is a dedicated brand for plastic board products manufactured using high-grade Polypropylene (PP) raw materials and advanced production lines. These boards are primarily designed for the construction industry as a modern, waterproof alternative to traditional wood-based materials like plywood, plyboard, and phenolic boards, specifically for use in concrete casting formwork and furniture making. Despite being a relatively new market offering, POLYFLEX is gaining popularity in the Philippines due to its significant value in reusability compared to traditional market offerings. The brand's ultimate goal is to become the leading choice for high-quality formwork and furniture materials by adhering to strict governing production standards.

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