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Welcome to RSS, LLC

A part of the Dupps Company, RSS manufactures Harmonite®, a unique multifunctional, versatile powder that can be used as an economical base compound for building new product formulations, and enhance the performance and economy of existing ones.

Developed through the Dupps Company's high-temperature processing and mechanical reduction expertise, RSS uses a patented process to produce Harmonite from recycled asphalt roofing shingles.

Over 11 million tons of waste shingles enter landfills yearly — that’s the equivalent of 22 million barrels of oil! In an effort to help reduce this waste, Harmonite was developed as a high-value added, economical bituminous additive, one that fulfills the Dupps Company’s goal of wholly sustainable and eco-friendly products.

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