Anyone experience reduced longevity when applied over a glaze?

[Mosca]

I did.

Applied by itself, #21 just lasts and lasts; beading, shine, slickness, everything.

Over #81, it looked great but the beading and slickness were gone after about 3 weeks. A reapplication of product (without the glaze) is now on its 3rd week and it is slick and beading.

Anyone else experience this?


Tom

[RamAirV1]

IMHO, you don't need to glaze each time you wax, unless you had to do some very aggressive cleaning. So your strategy for not using glaze every time you wax may be the way to go if the durability is better.

There was a thread somewhere on MOL where the chemists claim that the TS oils actually improve the bonding of a sealant.

RamAirV1

[305Cummins]

What about ColorX as a base for #21? Do you think the durability of #21 would be compromised by the ColorX?

[ebpcivicsi]

Originally posted by 305Cummins
What about ColorX as a base for #21? Do you think the durability of #21 would be compromised by the ColorX?

I have used colorX as a base for many sealants, #21 included. It worked quite well and I saw no negative effects on durability.

[rfinkle2]

what type of durability are you getting w/ the M21 on its own? and if you could... what are using to qd it? I am thinking of using the m21 for winter, and don't expect it to last all the way through.

I live in the northeast, and we get some snow, ice and the raods are salted quite a bit.

[ebpcivicsi]

#21 will easily last the full winter, especially if you plan on being able to wash and QD once or twice.

I have seen #21 go four months on my wife's truck. I couldn't go any longer without applying another coat, just didn't feel right. The paint was still beading/sheeting water superbly, looked excellent, and still felt smooth after a wash.

I wash it weekly, it spends the night outdoors, in the garage for most of the day, driven about 250 miles a week. I Qd'ed it with Last Touch mainly.

#21, IMO, is as durable as anything that I have ever tried.

[atticdog]

I know that if you wanted a topperfor #21 you should wait 12-24 hours or so
but what about if you topped a wax like #26 would the #21 seal in the look of #26?
then you wouldnt have to wait
would this work?
instead of #21 over a glaze or pure polish

[305Cummins]

Do you think using #80 under #21 would have a similar effect as #81; that is #80 would reduce the durability of #21 as #81 seems to do?

[Pete-FWA]

My last 3 steps on a detail today were M80 with the DA, then 2 applications of M21. I'll keep an eye on this one to see how it lasts. I've never used M21 over M80 before.

I have to say, M80 looks good, but M21 on top of it markedly improved the gloss and the depth of the Crimson Pearl Red Metallic paint.

[Mike Phillips]

Just to chime in, the only real way to test your hypothesis would be to equally prepare a surface, preferable a horizontal surface and then after properly claying and cleaning with either a dedicated paint cleaner or a cleaner/polish, wipe the surface clean and then apply the #81 to one marked off section, (like half the hood), and then apply two thin coats of M21 over this, and then use the other half as your control and don't apply a pure polish after prepping the finish and if you think necessary, wipe the finish down with a 50/50 mixture of Isopropyl Alcohol to water to insure it's squeaky clean and then apply the M21.

At this point you have reduced the variables at least to the point where you could watch and examine the finish over time to check and see if you in fact see any difference.

Of course it would be vital to treat both sides of this panel identically to insure integrity in the results.

Just to note, all tests should always be performed with the utmost integrity or there will be no value whatsoever in the results of the test.

[atticdog]

Mike will a pure polish like #3 #7 #81 remove a wax or sealant if you apply it over the wax?

[SR77]

Any more updates on this issue? Has anyone experienced the same thing? I was just getting ready to try this combo on my wifes car because I was gonna see if the #81 would fill in some slight marring on her dark paint, but I don't want to jeopardize the durability of the sealant. I thought all Meguiars products where compatible with each other without affecting the performance? Also, I know #21 is suppose to fill in swirls, so is there a big different in the hiding ability between just #21, and #81 then #21. Does the combo of 81 & 21 hide defects alot better then just using #21? Would NXT be more compatible with #81 the #21 is? thanks for the help.

[RamAirV1]

You can apply #81 or #7 over a wax without removing the wax. The polish won't stay on the surface very long though. It would be something useful to do before a car show.

I have experienced increased longevity with #21 when applied over #80. I had some areas on my '04 where I didn't apply #80 first and the #21 didn't seem to last as long. I judge that by how fast the water rolls off the paint after a car wash.

RamAirV1

[Hangers]

Over #81, it looked great but the beading and slickness were gone after about 3 weeks. A reapplication of product (without the glaze) is now on its 3rd week and it is slick and beading.

I experienced exactly the same thing. I re-applied the NXT about two weeks after the first coat and let it dry for 12 hours. Buffed the residue, and the results were fantastic! The NXT has now lasted about 4 weeks and still looks like the day it was applied.

[SR77]

If all Meguiars products are suppose to be compatible, then why would there be such a significant durability difference between using #81 under or not. Shouldn't it perform the same if they truly were compatible. The reason why I wanted to use #81 under #21 was to fill if some light marring, but I now I might have to reconsider it if 3 weeks later the the #21 will be gone. thanks