If the US government had extremely advanced alien technology to reverse-engineer the US government would have ended up getting some of that tech leaking out to industries that supply it. We could look back at the last 50 years of technological advance and spot advances that were much larger than any that happened.f there was a crashed alien space craft, we would have some kind of space drive or wormhole technology by now. Rockets and jet engines would be as obsolete as the horse and buggy. We would also have some kind of fusion or other energy source by now as well.
It is specially designed to maintain maximum reflectivity of heat and UV rays as it ages. Its moisture cure chemistry creates a very aggressive chemical bond with the roof, which provides permanent resistance to ponding water, extreme durability, and superior capabilities of sealing and protection.
1 Superior adhesion to concrete and fibre cement surfaces. 2  Low odour so can be used in any environment without discomfort. 3  25 year guarantee â when used as directed, i.e. for private use and within 12 months of purchase, the product is guaranteed against crumbling, cracking or drying.elleys Brick and Concrete Silicone is a neutral (non-corrosive) cure 100% silicone sealant. It is low modulus or can be stretched easily, which makes it ideal for joints which will move significantly such as expansion joints in concrete, and is grey so it will blend in with the concrete surrounds. 1  Overview.