Quote:
Brent Hodges wrote:
Actually 4200 will yellow over time. 3M 4000 is the one to use where it may be exposed to sunlight. It's about the same formula as 4200 but with UV resistance.
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Not exactly. 4000UV is a polyether, not a polyurethane like the 4200 and 5200. It is a good one for UV exposure. Stays white.