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PRESTO BLACK BST4 is a liquid brush-on blackener for all iron and non-stainless steels.

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Presto Black BST4 Brush-On 1USG Container

Silmid P/N: 530050
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No Stock - Standard lead time 52 business days

PRESTO BLACK BST4 is a liquid brush-on blackener for all iron and non-stainless steels.

Technical Information

  • UN Number 3264 CL8
  • Commodity Code 32099000
  • Country of Origin United States
EXPLOSIVE PRECURSOR/POISON: This product contains an explosive precursor and/or poison and is regulated or reportable under the Poisons Act 1972. For more information, please contact your account manager or call +44 (0)1675 432 850.

Data Sheets

Download the Presto Black BST4 technical data sheet (TDS) and the Presto Black BST4 safety data sheet (SDS) from Silmid today. Once you have logged in or signed up, the datasheet will be visible for download if one is available.

Product Properties

Pack Size
1USG Container
Manufacturer Name
Birchwood Casey

Product Information


  • Reacts quickly and produces a non-dimensional black finish in 30-90 seconds
  • Sealed with a protective oil
  • Suitable for use on precision tooling and machine components
  • Produce a pleasing distressed or antique pewter type finish


In short, the surface must first be thoroughly cleaned of all oil and excess scale. The black finish is then applied, rinsed, dried and sealed with a topcoat appropriate to the end use of the article.

Shipping information

Orders over £100 placed online will now qualify for FREE UK Mainland delivery*

**orders placed through the office will incur additional charges.** 

International delivery (door to door delivery) is available for selected countries worldwide. Shipping will be automatically calculated based on the weight, location and hazardous nature of the goods. Customers can also choose ex works to arrange their own collection.

Please refer to our delivery page for more information.