Transatlantic Berliner Blend | White Labs WLP4645 Yeast
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White Labs Transatlantic Berliner Blend : WLP4645
Produce Bright, Tart Beers Without Kettle Souring
White Labs WLP4645 Transatlantic Berliner Blend is a lactic acid-producing yeast blend designed to streamline the production of Berliner Weisse, quick sours, and other tart beer styles—without the need for kettle souring or separate bacterial cultures. This unique blend includes a low-attenuating Saccharomyces cerevisiae strain and heterofermentative Lachancea yeast species, offering a clean, citrusy acidity balanced by light esters. The result is a bright, refreshing beer with a crisp, sessionable finish and minimal complexity in process. Ideal for brewers looking to save time while still crafting world-class sours.
Key Characteristics:
- Attenuation: 75% - 82%
- Flocculation: Low
- Alcohol Tolerance: Medium (up to 8%)
- Fermentation Temperature Range: 70°F - 75°F (21°C - 24°C)
- Acid Production: Lactic acid (no bacteria required)
Perfect for Brewing:
- Berliner Weisse
- Kettle Sour Alternatives
- Quick Sours
- Table Sours
- Fruited Tart Ales
Why Choose WLP4645 Transatlantic Berliner Blend?
- No Kettle Souring: Skip time-consuming souring steps while achieving a clean lactic profile.
- Bright & Refreshing: Produces crisp acidity with light fruit esters and a dry finish.
- Streamlined Production: Perfect for brewers seeking fast, reproducible sour beers.
Enhance Your Brewing Process
Support consistent results by pairing WLP4645 with White Labs Brewzyme for improved fermentation cleanup and White Labs Zinc Buddy for stronger cell health in acidic environments.
Our Commitment to Yeast Health
All White Labs liquid yeast at SoCal Brewing Supply is refrigerated under strict temperature control, monitored 24/7 to protect viability and shelf life.
To help protect your yeast in transit, we recommend adding an ice pack and insulated envelope at checkout. These help buffer temperature swings, even though it's normal for ice packs to melt en route.
Explore more options in our complete White Labs Yeast collection here.