Hi Ning, thank you for your review. Sorry to hear that our Solid-Color Waterproofing Exterior Wood Stain started chipping and peeling. To fix the issue, I'd recommend removing the loose stain by scraping, sanding, or power washing at a low level. Then clean the surface with the All-In-One Wood Cleaner and let it dry, then apply 2 coats of stain per the label directions. Customer satisfaction is important to us, and we appreciate your feedback. Please reach out to us directly if you need further assistance; our customer care team is happy to help you! -Ronald