SRS: Setting the Standard
SRS manufacturers a range of investment powders for all types of jewellery applications which deliver flawless results, batch after batch. SRS products are trusted by jewellers worldwide for their consistency, quality and reliability — helping you bring your finest designs to life.
Setting the Standard
SRS is a division of Goodwin Refractory Services Ltd, a UK-based company that has proudly served the jewellery, industrial, and aerospace sectors for over 60 years. Together with our sister companies, GRS has grown to become the global market leader in the manufacture and supply of high-performance investment powders.
Certified for Confidence
At SRS, we are committed to delivering the highest quality investment powder for jewellery casting. Every batch is rigorously tested in our purpose-built laboratory to ensure consistent performance and reliability. Our UK-based technical sales representatives work closely with customers to provide expert support and guidance, ensuring optimal results at every stage of the casting process. SRS is proud to be certified ISO 9001, ISO 14001 and ISO 45001 by the British Standards Institute (BSI).
SRS IN NUMBERS
- Over 65,000 Tonnes Manufactured per year
- Approximately 2.9 Million 22.7Kg Sacks
- Over 120 Distributors Worldwide
- Accredited ISO 9001, ISO 14001 and ISO 45001 by the British Standards Institute (BSI)
- 8 Manufacturing Plants strategically located throughout the world.
- Dedicated in Country Technical Sales Representatives all governed by our UK head office
Products We Offer
Castaldo Rubber Products
Within the Goodwin group of companies, a dedicated division specialises in the manufacture and supply of moulding rubbers—including Silicone rubber, Natural rubber, Liquid rubber and Putty rubbers.
These products are made specifically for all jewellery moulding applications. For further information about these products, please get in touch to request more details.
Universal Quality Range
SRS JEWELLERY INVESTMENTS
SRS offers a comprehensive range of high-performance investment powders specifically formulated for all jewellery applications, they are suitable for casting in brass, silver, and all high-karat gold alloys.
Each product is engineered to deliver superior surface finish, precise detail reproduction, and reliable thermal stability, making them ideal for everything from delicate filigree pieces to complex, high-value gold designs.
Trusted by jewellers and manufacturers worldwide, our investment powders are backed by rigorous quality control and expert technical support, ensuring consistent results across diverse casting environments.