Alexander, thank you for providing your feedback regarding the hose grommet. We regret that this product has not met your expectations. The dual hose grommet is specifically designed to protect the hose from abrasion, and while it may offer some incidental sealing capability, its primary function is not to create a seal. For optimal pass-through sealing, we suggest the use of bulkhead fittings. Although these fittings involve greater expense and installation effort compared to the grommet, they deliver a superior environmental seal.