This is a hard no. Old-school sales guys might say so, but in this day and age, people can smell a hard sale from a mile away (and they tend not to like it). Instead of focusing exclusively on getting the user to take action, you should look at your landing page as an opportunity to push your product, while also building a relationship with the potential customer.
Remember, if the user wants to buy the product right away, they will do so at the top of the page. But if they aren’t quite sure yet, they will scroll around the page before deciding. They are looking for reasons to trust you and your product, which is why it’s crucial to build that relationship from the get-go. Testimonials, honest reviews, and guarantees/warranties can work wonders to ensure the user ends up making the decision you want them to make.