Laminate Flooring....

Sealing the joints of a snap/click laminate?

You cant really make 'affordable' last a lifetime.
Pull the base off..Seal and subfloor it , then underlay and stagger them 18"-20" 'or whatever the box says to.'and gap from wall 3/8ish all round.
Solid wood is what lasts, but even then in damp climates needs a 24" disc sand and refin about or around 12-18 years.