If you need a little extra help that a seal just wouldn't fix due to the position of your garage door these foam blocks will do the job just fine.
1 H x 8'3L GaraDry Garage Door Threshold Seal Kit 1 in. WS005-252 - Black - FloorMatShop - Commercial Floor Matting & Custom Logo Mats
1 ¼” High Garage Door Threshold Seal Kit 10'3 Length, Flexible PVC, Complete Kit Includes 1 Adhesive
Garage Door Threshold Seal Kit 1 High, 20'3 Includes 2x Adhesive
¾” High Garage Door Threshold Seal Kit 20'3 Length, Flexible PVC, Complete Kit Includes 2 Adhesives
Residential Door Threshold Seals - Seal Kits – GaraDry USA
1 ½ High Garage Door Flood Barrier Threshold Kit (8'3), Flexible PVC, Complete Kit Includes 2 Adhesives
1 ¼” High Garage Door Threshold Seal Kit 10'3 Length, Flexible PVC, Complete Kit Includes 1 Adhesive
Garage Door Thresholds - Garage Door Seals – GaraDry USA
GARAGE DOOR SEAL, TOP & SIDES Vinyl With Vinyl Insert - Climaloc Solutions