Yes, silicone does stick to silicone. When two silicone surfaces come into contact, they tend to adhere to each other due to their similar chemical composition. This property makes silicone a popular material for creating airtight seals and bonding silicone-based products together. **

The specific upgrades needed will depend on the context, but generally speaking, areas that should be considered for upgrades include technology systems, infrastructure, equipment, processes, and skills. It is important to regularly assess these areas to identify any outdated or inefficient components that could be improved. Upgrading these elements can help increase efficiency, productivity, and competitiveness in both personal and professional settings. **

For PVC and wood, a neutral-cure silicone is suitable. This type of silicone does not release any corrosive by-products and is therefore safe to use with PVC and wood. It also has good adhesion and flexibility, making it a suitable choice for sealing and bonding applications involving these materials. Additionally, it is resistant to weathering and UV exposure, making it a durable option for outdoor use. **

It is generally not recommended to apply new silicone on top of existing silicone. The new silicone may not adhere properly to the old silicone, leading to potential issues with adhesion and durability. It is best to remove the old silicone completely before applying a new layer to ensure a proper bond and a long-lasting seal. **

Yes, silicone can be applied on top of existing silicone. However, it is important to ensure that the existing silicone is clean and free of any dirt, dust, or residue before applying new silicone. Additionally, it is recommended to use a silicone primer to promote adhesion between the old and new silicone layers. This will help to create a strong bond and ensure a durable seal. **

Silicone lenses are a type of contact lens made with a silicone-based material, which allows for increased oxygen permeability to the eye. This can help reduce the risk of eye infections and improve overall comfort. Silicone hydrogel lenses are a specific type of silicone lens that also includes hydrogel, a water-absorbing material that helps keep the lenses moist and comfortable for longer periods of time. These lenses are popular for their breathability and comfort, making them a popular choice for contact lens wearers. **

The decision to upgrade the Bundeswehr should be carefully considered based on the current security threats and defense needs of Germany. If there is a genuine need to enhance the capabilities and readiness of the Bundeswehr to effectively respond to modern security challenges, then an upgrade may be necessary. However, it is important to ensure that any upgrades are in line with Germany's commitment to peace and stability, and that they do not escalate tensions or contribute to an arms race. Ultimately, the decision should be made with a focus on enhancing national security while promoting peace and cooperation. **

Yes, an iMac can be upgraded to some extent. Depending on the model, you may be able to upgrade the RAM, storage, and even the processor in some cases. However, the level of upgradability varies between different iMac models, so it's important to check the specifications of your specific model before attempting any upgrades. Additionally, some components may be more difficult to upgrade than others, so it's recommended to consult with a professional if you're unsure about the process. **