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73-87 Chevy _ GMC Trucks => Body, Glass & Paint => Topic started by: kcwis on June 20, 2017, 06:02:28 pm

Title: Viscosity cup Zahn #2 or Dupont M50
Post by: kcwis on June 20, 2017, 06:02:28 pm

Are they the same spec?  I have a M50, the Urethane primer calls for a Zahn #2

Title: Re: Viscosity cup Zahn #2 or Dupont M50
Post by: zieg85 on June 20, 2017, 09:32:40 pm

Quote from: kcwis on June 20, 2017, 06:02:28 pm

Are they the same spec?  I have a M50, the Urethane primer calls for a Zahn #2

Close enough probably but not the same.  There are so many versions of Zahn #2 viscosity cups and they all measure differently unless you get the ultra calibrated $200 ones like I carry for work