Leakage is the #1 reason for returns on Amazon. As a contract manufacturer, we developed a multi-layer sealing protocol to ensure your private label products arrive dry and perfect.

There is nothing worse for an Amazon seller than that notification: “Product suspended due to customer complaints – Defective Item (Leakage).”

I’ve seen great brands fail not because their product was bad, but because their bottle cap loosened slightly during a bumpy truck ride from a fulfillment center.

As a manufacturer who also builds brands, I know that packaging engineering is just as important as the chemical formula. We don’t just pour liquid into a bottle and hope for the best. We engineer the seal.

Our “Violence Test” Protocol Recently, a client came to us after their previous supplier caused a 15% return rate due to leaking oil. We didn’t just tighten the caps. We overhauled the process:

• The Liner Match: We tested 6 different induction heat seal liners to find the one that bonds perfectly with PET plastic, even under pressure changes in cargo planes.

• Torque Calibration: We don’t rely on hand-tightening. Our capping machines are calibrated to a specific torque value—tight enough to secure the seal, but not so tight that it cracks the neck.

• The Drop Test: Before we ship your order, we take random samples, flip them upside down, and simulate a 1-meter drop. If one leaks, the whole batch stops.

Since implementing this protocol, our clients have reported a near-zero leakage rate on global shipments.

Don’t let a 2-cent seal ruin your brand’s reputation. Let’s build a product that survives the journey.