With RibBracket I-IV, there are no messy sealants to apply and no chance for leaks! RibBracket I-IV comes with a factory-applied EPDM rubber gasket seal already on the base, and the S-5!®-patented reservoir conceals the EPDM from UV exposure, preventing drying and cracks. RibBracket I-IV is the perfect match for our S-5-PV Kit, Edge Grab or bottom mount rails, without worrying about cold bridging! RibBracket I-IV is extremely economical and facilitates quick and easy installation. The slotted top hole, which accommodates standard M8 nuts and bolts, simplifies alignment and maximizes flexibility in attaching ancillaries.