SPI Sealer

Machspeed

Machspeed

Member
Friends, I have questions regarding SPI sealer. I know I can mix SPI epoxy to seal with but I need something that I can top coat over sooner, as I will have a booth and my time in it will be very limited.

First off, what color sealer would be best? My car will be painted Gulfstream Aqua (BC/CC), same color in my avatar. This color is a metallic. It will be applied over blocked gray SPI high build primer?

Secondly, approximately how much, quantity wise, to seal a fastback Mustang?

Lastly, what would be the recommended sanding grit for applying it to the high build? I've read 400 for solids and 600 for metallics but when using a sealer, I can go 400 grit.

Thanks,

John
 
You can base over SPI epoxy mixed 1:1:1 as a sealer in 20-30 minutes give or take. A light grey would work, the sealer mixed as described isn't going to cover solid but you mentioned you are starting from grey SPI high build. Apply the sealer like it it's the first coat of base.
To bad you are going to be limited for time in the booth, better results come from letting that base gas out overnight. Can you arrange it so
you can do the sealer/base at the end of a day and then clear first thing in the morning?
 
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Thanks metalman! Sounds like I'm just as good to go with the SPI epoxy as my sealer and not incur the cost of an additional materials.

Yes, on the base gassing out overnight. There's a recent post on that here and I'm going to try and make that happen but it may not.
 
I know Crashtech answered the question in the primer thread. Your safer finish sanding with 600 if you want to use the epoxy sealer mixed 1:1:1 (50%).
If mixing the epoxy sealer thicker 1:1:1/2 (25%), you need to wait longer before base, and if you need to move along with the booth time limited that won't work.
 
metalman said:
I know Crashtech answered the question in the primer thread. Your safer finish sanding with 600 if you want to use the epoxy sealer mixed 1:1:1 (50%).
If mixing the epoxy sealer thicker 1:1:1/2 (25%), you need to wait longer before base, and if you need to move along with the booth time limited that won't work.
Click to expand...
The info says to spray with a 1.4. If it is thinned as a sealer 1:1:1/2 will make it thinner. I have a small compressor and a Iwata LPH80 124G Baby /Mini Gun. Will it be thin enough to shoot through a 1.2 ?
 

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Great! So I can spay it Un Reduced? Just gotta be shure! Thanks. I'm 69 and this will be my 1st paint job other than Practice. My 1st test
 
Ok. I will mix it and shoot it. Still waiting on continuous 70 degrees weather. Still have cooler nights and mornings. Making a DIY spray area in garage. Wish me luck!
Thanks.
 
metalman said:
You can base over SPI epoxy mixed 1:1:1 as a sealer in 20-30 minutes give or take. A light grey would work, the sealer mixed as described isn't going to cover solid but you mentioned you are starting from grey SPI high build. Apply the sealer like it it's the first coat of base.
To bad you are going to be limited for time in the booth, better results come from letting that base gas out overnight. Can you arrange it so
you can do the sealer/base at the end of a day and then clear first thing in the morning?
Click to expand...
I've been entertaining the idea of using Epoxy as a sealer instead of the SPI Sealer but have been against it because of the flash time before base. Do you use the SPI Epoxy as a sealer with 20-30 min flash before base often? No issues? I only spray HD motorcycle parts and am using mainly HD paint, which is single stage.

I like the SPI Sealer but also like the idea of using Epoxy for better "protection"
 
SPI has two types of sealer......

1) 2k sealer
2) Epoxy sealer

Flash time for wet on wet with epoxy sealer, I'd wait an hour. Let see what the pro's have to say for wet on wet epoxy flash time.
 
MillerMotorsportsLLC said:
I've been entertaining the idea of using Epoxy as a sealer instead of the SPI Sealer but have been against it because of the flash time before base. Do you use the SPI Epoxy as a sealer with 20-30 min flash before base often? No issues? I only spray HD motorcycle parts and am using mainly HD paint, which is single stage.

I like the SPI Sealer but also like the idea of using Epoxy for better "protection"
Click to expand...
Epoxy mixed 1:1:1 (1:1:50%) can be sprayed in as little as 15 minutes. Ideally somewhere closer to 30 minutes. Booth and warm temps (80+) 15minutes works. 1:1:25% I'll go anywhere from 2-6 hours. I don't feel comfortable waiting overnight with 1:1:25%, others do though so up to you. 1:1:10% which I rarely ever do anymore somewhere from 8-18 hours.
 
Chris_Hamilton said:
Epoxy mixed 1:1:1 (1:1:50%) can be sprayed in as little as 15 minutes. Ideally somewhere closer to 30 minutes. Booth and warm temps (80+) 15minutes works. 1:1:25% I'll go anywhere from 2-6 hours. I don't feel comfortable waiting overnight with 1:1:25%, others do though so up to you. 1:1:10% which I rarely ever do anymore somewhere from 8-18 hours.
Click to expand...
And the epoxy lays down smooth at the 1:1:1/2 reduction? One wet coat? I usually wait 20-30 mins with the 2K Sealer before laying base.

Do you do any induction time at the 1:1:1/2?

I was reading the TDS last night and it says 2 hour flash before basecoat which is just way too long for me and an induction time of 30 mins.
 
MillerMotorsportsLLC said:
And the epoxy lays down smooth at the 1:1:1/2 reduction? One wet coat? I usually wait 20-30 mins with the 2K Sealer before laying base.

Do you do any induction time at the 1:1:1/2?

I was reading the TDS last night and it says 2 hour flash before basecoat which is just way too long for me and an induction time of 30 mins.
Click to expand...
By 1:1:1/2 you mean 1:1:25% correct? That would be what needs 2 hours absolute minimum. 1:1:1 or 1:1:50% (same thing) is what you can spray in 15 to 30 minutes. Essentially about as fast as urethane. It's thin reduced that way and coverage is not great. If you need to cover then you are better off using 1:1:1/2 or1:1:25% (same), but if that's too slow (2hrs) then you should just use urethane.
 
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