The kind of caulk we can select completely depends on the vanity’s countertop material. Pure silicone caulk is best for the granite ones as it helps provide a fine finish. However, the laminate vanity countertops provide more flexibility for the caulk selection. From silicone and latex to acrylic, any type of caulk can go with laminate vanity countertops to cover gaps. However, to avoid dampness and water damage issues, it’s suggested to opt for silicone caulk as it offers commendable water resistance.