double wiper seal

35 47 7 oil seal.
Oil seals are generally constructed from materials that can withstand the specific chemical properties of the lubricant they are sealing. Common materials include rubber, silicone, and various elastomers. The design of an oil seal often incorporates a lip that rolls against a shaft or surface, creating a dynamic seal that can accommodate movement while maintaining its sealing capabilities.
dust seal vs oil seal



Reflective granules are a special material that can reflect sunlight and reduce the heat absorbed by the building, thereby reducing the indoor temperature and achieving energy-saving effects. In roof design, Reflective granules are usually added to roof coatings to form a reflective coating. This coating can not only improve the reflectivity of the roof and reduce the heat island effect, but also extend the service life of the roof material, because the reduced heat absorption means that the aging rate of the material will slow down.
Another factor is the installation process. If shingles are not installed correctly, they may be more prone to damage from wind and rain, leading to granule loss. Poor installation practices, such as improper nailing, may leave certain areas of the roof vulnerable. Homeowners should ensure that their roofing contractors are experienced and follow industry best practices to minimize these risks.
new roof shingles losing granules
