Over the years, our research and development team had been working on to formulate a sealant mixture for the RV industry that is easy to apply on our own without the help of any heavy machinery and expert professionals. Thinner and primers were essential to mix with the sealant before application and it makes it difficult for a single handed person to seal the camper on his own.After much hard work, the team has succeeded in formulating a sealant mixture that will never need a primer or thinner