Equivalent coolant to Volvo Penta VCS

[Donald]

Looking to add some coolant to the overflow. Not looking to drain, clean, flush and refill with some other coolant.

Not looking to use AM/AM.

It's OAT based but the manual say do not mix with other brand HOAT or OAT coolant.

The marinas and boating store do not carry it. Or out of stock. And some are Volvo Penta authorized dealers.

 

[Donald]

Have not found any equivalent. Spending the $$ on the real Volvo Penta coolant.