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A company with a global reputation for high quality consistent products, world class technical support and excellent customer service.

7th May 2021

GRS Adds Natural Rubber Product Range

As of the 7th May 2021 Goodwin Refractory Services (GRS) has acquired the remaining Natural Molding Rubber product lines from F.E.Knight to add to the existing acquired Castaldo Silicone Rubber, RTV Rubber and Wax product lines.

Welcome to Castaldo

A brand with a global reputation for high quality consistent products, world class technical support and excellent customer service.

Castaldo products are manufactured in an ISO 45001:2018 and ISO 9001 Quality Management accredited company that continually invests in R&D and understands the requirement of close customer relationships combined with a world class technical support network. In each of our five manufacturing locations we have locally based highly trained quality control and technical sales teams which offers a bespoke service to our customers supported by the UK headquarters.

Castaldo LiquaSil Rougé RTV Rubber

Silicone Jewelry Molding Rubber

All Castaldo Silicone Jewelry Molding Rubbers make superior quality molds that are tough, strong, easy to pack, easy to cut and easy to use.

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Natural Jewelry Molding Rubber

Castaldo White & Gold Label Natural Rubber makes very strong and flexible molds.
Conveniently packaged in either 50lb (22.7kg) or 5lb (2.27kg) rolls.

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RTV Silicone Molding Rubber

RTV silicone is a liquid silicone compound that cures at room temperature to form a flexible rubber. The term RTV is means Room Temperature Vulcanising.

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Injection Wax

Superior quality waxes for a full range of applications, producing patterns that are very flexible, resilient and durable with great memory while still being easy to work with and to inject.

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Castaldo (A Division of) Goodwin Refractory Services Ltd
Spencroft Road,
Newcastle-under-Lyme,
Staffordshire,
ST5 9JE,
United Kingdom

+44 (0) 1782 66 36 00

[email protected]

Goodwin Refractory Services Limited is a company registered in England. Company number 1797882, VAT No. GB278923705.  
Registered Office: Ivy House Foundry, Hanley, Stoke-on-Trent, Staffordshire, ST1 3NR, United Kingdom.

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GRS Adds Natural Rubber Product Range

As of the 7th May 2021 Goodwin Refractory Services (GRS) has acquired the remaining Natural Molding Rubber product lines from F.E.Knight to add to the existing acquired Castaldo Silicone Rubber, RTV Rubber and Wax product lines.

The range of Natural Molding Rubber products and Consumables will be rationalised at this point in time to focus on the supply of the core products.

The Natural Molding rubber range will be reduced to two products; Castaldo Gold Label® and Castaldo White Label® with No Shrink Pink and Titanium Label being no longer available. Castaldo Gold Label® and Castaldo White Label® will only be available in two formats 50lb/22.7Kg and 5lb/2.27kg rolls. Quadrotto, Strips, Convenience Packages, Ready Cut and Disco formats of the Castaldo Gold Label® and White Label® will no longer be available.

Castaldo Silicone Jewelry Mold Release Spray will continue to be available in 12 cans per case and the Castaldo Mold Frames will also continue to be available. Moldmatic Frames, Mold Lock Formers, Mold Separation Cream will no longer be available.

We believe that this further acquisition will be good news to all Castaldo distributors and customers as they can now purchase all of the Castaldo products from Goodwin Refractory Services at [email protected]

All Castaldo Natural Molding Rubber products will be supplied from Goodwin Refractory Services in the United Kingdom.