Brettanomyces claussenii | White Labs WLP645 Yeast
If this yeast is on sale at 40% off, it’s likely nearing its expiration date—but don’t worry! It’s still highly viable and a great way to save on your brew.
Yeast Specifications:
- Manufacturer: White Labs
- Yeast Type:
- Attenuation:
- Flocculation:
- Temperature:
White Labs WLP645 Brettanomyces claussenii: Subtle Funk with Tropical Nuance
Add Depth and Character to Wild Ales and Farmhouse Brews
White Labs WLP645 Brettanomyces claussenii is a versatile Brett strain known for producing light funk alongside refined notes of pineapple, mango, and pear. Compared to other Brett strains, WLP645 is less aggressive in its barnyard character and is ideal for brewers seeking a more delicate, fruit-forward expression. It’s typically used in secondary fermentation to develop complexity over time, making it a great choice for farmhouse ales, mixed fermentations, and fruit-forward sour beers.
Key Characteristics:
- Attenuation: 85%+
- Flocculation: Low
- Alcohol Tolerance: Medium to High
- Fermentation Temperature Range: 70°F – 85°F (21°C – 29°C)
- STA1 Status: Positive
Ideal for Brewing:
- Farmhouse Ales
- American Wild Ales
- Sours with Fruit Additions
- Mixed Culture Projects
Why Choose WLP645 Brettanomyces claussenii?
- Refined Brett Profile: Produces tropical fruit esters with mild earthy funk.
- Great for Fruit Beers: Enhances fruit character and adds complexity during aging.
- Controlled Funk: Ideal for brewers seeking a more approachable Brett fermentation.
Enhance Your Brewing Process
Pair WLP645 with White Labs Brewzyme to reduce diacetyl and streamline conditioning. Support yeast health and performance with White Labs Zinc Buddy.
Our Commitment to Yeast Health
At SoCal Brewing Supply, we take yeast storage and viability very seriously. All yeast is stored under optimal refrigeration conditions, with 24/7 temperature monitoring to ensure freshness and performance.
We recommend shipping liquid yeast with an ice pack and insulated envelope to help maintain stability during transit. Melted ice packs are expected and prevent temperature spikes.
Browse our full selection of White Labs Yeast here.
White Labs WLP645 Brettanomyces claussenii offers a restrained yet expressive Brett profile—perfect for nuanced, fruit-forward fermentations.