Midwestern Ale Yeast | White Labs WLP4040 Yeast
White Labs WLP4040 Midwestern Ale Yeast: Smooth and Balanced American Ale Strain
Clean-Fermenting Yeast Ideal for Cream Ales, Blondes, and More
White Labs WLP4040 Midwestern Ale Yeast is a versatile strain selected for brewing approachable, easy-drinking ales with a smooth mouthfeel and restrained ester profile. Developed for Midwestern-style cream ales and other crowd-pleasing American styles, this yeast provides a clean fermentation with medium attenuation and excellent balance. Its mild fruity esters and subtle malt expression make it ideal for beers where drinkability is key.
Key Characteristics:
- Attenuation: 72% – 78%
- Flocculation: Medium
- Alcohol Tolerance: Medium (up to ~8%)
- Fermentation Temperature Range: 66°F – 70°F (19°C – 21°C)
- STA1 Status: Negative
Ideal for Brewing:
- Cream Ale
- American Blonde Ale
- American Amber Ale
- Kolsch-Style Hybrids
- Session Ales
Why Choose WLP4040 Midwestern Ale Yeast?
- Clean and Approachable: Produces balanced beers with excellent clarity and smooth drinkability.
- Perfect for Light Ales: Great for cream ales and other American classics that benefit from a subdued yeast profile.
- Reliable Fermentation: Medium flocculation and attenuation ensure consistent results across a range of recipes.
Enhance Your Brewing Process
Support fermentation health by pairing WLP4040 with White Labs Brewzyme to reduce diacetyl and White Labs Zinc Buddy to maintain strong fermentation performance.
Our Commitment to Yeast Health
At SoCal Brewing Supply, all White Labs yeasts are kept in 24/7 temperature-monitored refrigerators for peak freshness and viability. For shipments, we recommend adding an ice pack and insulated envelope to protect yeast during transit. Melted ice packs upon arrival are normal and help buffer temperature changes.
Explore our full White Labs yeast selection here for even more pro-level strains.
Choose WLP4040 Midwestern Ale Yeast to craft smooth, balanced ales with classic American flavor and crystal-clear results.