Undersealing?

[krisasthecolour]

Hi guys, recently acquired a lovely low mileage late 2017 Nismo and I intend on keeping it for a long, long time. I was wondering if anyone had undersealed their 350 or 370 to protect against the salt on the winter roads? I know it's a must-do on JDM imports, but mine is a UK release and I've read differing opinions on whether undersealing is worth doing or a waste of money? 

 

Any and all opinions appreciated 👍 

[Keith D]

I don't use underseal as it can dry and crack.  I jet wash and then use Bilt Hamber Dynax.

[Stutopia]

The product you use is the tricky part - but wether or not you should protect Japanese cars from UK roads (JDM or otherwise) to me is an absolute no brainer - YES!

 

My 1998 Mk3 Hilux is like new underneath (which is good because every single panel is dented and scratched  ) because someone protected it years ago and maintained it.

[krisasthecolour]

On 26/06/2026 at 11:13, Stutopia said:

The product you use is the tricky part - but wether or not you should protect Japanese cars from UK roads (JDM or otherwise) to me is an absolute no brainer - YES!

 

My 1998 Mk3 Hilux is like new underneath (which is good because every single panel is dented and scratched  ) because someone protected it years ago and maintained it.

Thanks Stu (assuming your name is Stu haha). 

I don't suppose you've any recommendations on what style of underseal to get done ie: products etc? I gather if it's done poorly it can cause more harm than good?