permanent gains, the amount remains from pumping after cementing?

[the_1homie]

for example say you grow .5 inch using a pump after cementing those gains what of that remains?

 

[Big Al]

As long as you maintain a good degree of penile "fitness" through stamina work and/or sexual activity (the requirement to maintain mostly being the ability to achieve and hold rock hard erections) then your tissues should remain expanded and your gains maintained.