So do you have to be dead on perfect the moment you set the glass, or can minute adjustments be made once it's down?

It takes 48 hours to cure. You have 5 to 10 min before you can't adjust window anymore. Side note. Urathan will stain anything it touches even your skin. So be very careful and don't use more than you need to.

What durometer does this stuff cure to?

Hi Travis! Thank you for your question. The 3M 08609 Window-Weld Super Fast Urethane has a 55-60 Hardness (Shore A).

Will 3m 08693 auto glass urethane secure the rear glass to a canvas convertible top? sides and bottom have separated and need to be glued.

Yes. I purchased a small piece of convertible roof fabric on ebay which matched my convertible's black top and I cut it to fit the lower part below therear window with about a one inch overlap onto the window. I followed the adhesive directions and glued the new material right onto the window andthe old convertible fabric. I let it sit for 48 hours. Today, you can hardly notice it was repaired and the adhesive still adheres to the glass.

3m Urethane Super Fast Cartidge Black 10 Oz

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Seal it fast, seal it strong — the pro’s choice for flawless auto glass bonding!

UNBREAKABLE BOND - 1000 psi tensile strength ensures windshields stay sealed against leaks and vibrations.
LIGHTNING FAST CURE - Get vehicles back on the road in just 1 hour with advanced moisture-curing tech.
MESS FREE PRECISION - Medium viscosity formula prevents drips for flawless vertical and overhead application.
PLUG PLAY ADHESIVE - Single-component urethane requires zero mixing—just load and apply with any standard caulking gun.
UNIVERSAL FIT FUNCTION - Perfect for windshields, rear and quarter glass on cars, trucks, and SUVs—plus select panel bonds.

3M Urethane Super Fast Cartridge is a professional-grade, single-component polyurethane adhesive designed for rapid, durable windshield and auto glass bonding. It cures to full strength in just 1 hour, offers 1000 psi tensile strength, and features a no-mess, medium viscosity formula compatible with standard caulking guns. Ideal for automotive pros seeking reliable, weatherproof seals that minimize vehicle downtime across cars, trucks, and SUVs.

Specifications

ASIN	B000FW61EW
Best Sellers Rank	#1,816 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Urethane Adhesives
Brand Name	3M
Color	Black
Compatible Material	Glass
Container Type	Cartridge
Customer Reviews	4.6 4.6 out of 5 stars (4,456)
Full Cure Time	1 hours
Global Trade Identification Number	00051135086094
Included Components	Window-Weld
Item Form	Paste
Item Package Quantity	1
Item Type Name	Urethane Super Fast Cartidge
Item Weight	14.4 ounces
Manufacturer	3M
Material Type	Urethane
Model	08609
Number of Pieces	1
Other Special Features of the Product	1.Professional Auto Glass Bond 2.Easy, No-Mess Application 3.Super fast 1-Hour cure 4.Easy caulking 5.OEM Strength
Part Number	08609
Specific Uses For Product	1.Windshield Replacement 2.Back/Side Glass
Tensile Strength	1000 psi
UPC	051135086094
Unit Count	10.5 Fluid Ounces
Viscosity Level	Medium
Volume	10.5 fluid ounces
Warranty Description	New out of box defects
Water Resistance Level	Water Resistant

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