Refund policy

Our Guarantee

Every order ships sealed, authentic, and lot-coded. If something arrives wrong, damaged, incorrect, or missing, we make it right. Contact us within 7 days of delivery and we'll send a replacement or issue a refund, no runaround.

How to reach us: Use the contact form at gridlinebac.com/pages/contact. Include your order number, a photo of the item and packaging, and a brief description of the issue. We'll respond within 1 business day.

Why we don't accept returns

Because these are laboratory-use materials, we can't accept returns on product that has left our possession. Storage conditions, temperature exposure, and chain-of-custody cannot be verified once delivered. This protects the integrity of every order we ship.