Product Overview
The BLANCO Precis Silgranit 50/50 Double Bowl Undermount Kitchen Sink in Coal Black is engineered for durability and ease of maintenance. Crafted from patented SILGRANIT material, it offers exceptional resistance to heat, scratches, stains, chips, and impacts. Its Hygienic+Plus surface technology actively inhibits bacteria growth, ensuring a cleaner kitchen environment.

Figure 1: Top-down view of the BLANCO Precis Silgranit 50/50 Double Bowl Undermount Kitchen Sink.
Key Features
- Durable SILGRANIT Material: Patented SILGRANIT material provides superior resistance to heat, scratches, stains, chips, and impacts, ensuring long-lasting performance.
- Hygienic+Plus Surface Technology: This advanced surface acts as a protective shield, inhibiting bacteria growth by up to 98% for enhanced hygiene.
- Easy-to-Clean: Simple cleaning with baking soda and a soft sponge is sufficient; no harsh chemicals are required to maintain its pristine appearance.
- Optimal Dimensions: Sink dimensions are 29.75" L x 18.13" W x 8" D, designed to fit a 36" minimum cabinet base.
- Third-Party Certified: BLANCO is the only granite composite sink manufacturer meeting composite stone IAPMO standards.

Figure 2: Detailed dimensions of the BLANCO Precis Silgranit 50/50 Double Bowl Undermount Kitchen Sink.
Setup and Installation
For detailed installation instructions, please refer to the official Installation Manual provided by BLANCO. This sink is designed for undermount installation.
A digital copy of the installation manual can be found here: BLANCO Precis Silgranit Installation Manual (PDF).
Included Components:
- Installation instructions
- Template
Operating the Sink
The BLANCO Precis Silgranit sink functions as a standard kitchen sink, providing two equally sized bowls for various kitchen tasks. The 50/50 double bowl configuration allows for efficient multi-tasking, such as washing dishes in one bowl while rinsing in the other.
Drain Type:
This sink features a Lift and Turn drain type for convenient water drainage and retention.
Maintenance and Care
Maintaining your BLANCO Silgranit sink is straightforward due to its non-porous and resistant properties. Regular cleaning will keep it looking new for years.
General Cleaning:
- For daily cleaning, use baking soda and a soft sponge.
- Avoid abrasive cleaners, steel wool, or harsh chemicals, as these can damage the surface.
- Rinse the sink thoroughly after each use to prevent water spots, especially in areas with hard water.
- Wipe the sink dry with a soft cloth after use to maintain its matte finish and prevent mineral buildup.
Stain Removal:
While highly stain-resistant, some stubborn stains may require additional attention. For tough stains, a diluted solution of bleach (1 part bleach to 10 parts water) can be used, but ensure to rinse thoroughly immediately after application.
Heat Resistance:
The SILGRANIT material is heat resistant up to 536°F (280°C). However, it is always recommended to use a trivet or hot pad for extremely hot pots and pans to prevent potential thermal shock or discoloration over time.

Figure 3: The deep flat matte-black finish of the Coal Black Silgranit material.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Water spots/mineral buildup | Hard water residue left to dry. | Wipe sink dry after each use. For existing buildup, use a 50/50 solution of white vinegar and water, let sit for 15 minutes, then scrub and rinse. |
| Dull appearance | Accumulation of grease or soap film. | Clean with baking soda and a soft sponge, then rinse thoroughly. For deeper cleaning, use a non-abrasive granite cleaner. |
| Minor scratches | Heavy impact or sharp objects. | SILGRANIT is highly scratch-resistant. Minor marks can often be buffed out with a non-abrasive cleaner and a soft cloth. Avoid dragging heavy or sharp objects across the surface. |
| Stains from food/liquids | Prolonged contact with highly pigmented substances. | Clean immediately with baking soda. For persistent stains, use a diluted bleach solution (1:10 bleach to water) for a short period, then rinse thoroughly. |
Specifications
| Attribute | Detail |
|---|---|
| Brand | BLANCO |
| Model Number | 442927 |
| Color | Coal Black |
| Material | Stone, Granite (SILGRANIT) |
| Product Dimensions (D x W x H) | 18.11" x 29.75" x 8.37" |
| Installation Type | Undermount |
| Finish Type | Matt |
| Drain Type | Lift and Turn |
| Item Weight | 38 Pounds |
| Product Care Instructions | Hand Wash |
| UPC | 747943050876 |
Manufacturing Process:
BLANCO's SILGRANIT sinks are manufactured with precision and advanced technology to ensure their superior quality and durability. The process involves engineering granite into a moldable material that retains the natural strength and beauty of granite while offering enhanced resistance to daily wear and tear.
Video 1: An overview of the Silgranit production process, highlighting the innovation and durability of BLANCO sinks.
Warranty and Support
The BLANCO Precis Silgranit sink comes with a limited lifetime warranty, ensuring peace of mind regarding its quality and performance.
Warranty Details:
Limited lifetime warranty. For specific terms and conditions, please refer to the warranty documentation included with your product or contact BLANCO customer service.
Customer Support:
For any questions, technical assistance, or warranty claims, please visit the official BLANCO website or contact their customer support line. Refer to your product packaging for direct contact information.





