Provides a water repellent coating to help prevent shower water and spots from sticking to the glass surface. Prevents soap scum, hard water deposit, and grime from building up. Easy-to-apply, durable coating lasts for weeks. For glass surfaces only. Comes in 16 ounce trigger bottle. Rain-X shower door water repellent uses advanced technology that causes water to bead and slide off on glass surfaces. Regular use helps prevent hard water stains, soap scum, and grime build-up on your glass Shower door keeping it looking clean for weeks. Provides a water repellent coating to help prevent shower water and spots from sticking to the glass surface. Prevents soap scum, hard water deposit, and grime from building up. Easy-to-apply, durable coating lasts for weeks. For glass surfaces only. Comes in 16 ounce trigger bottle.