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.

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3M Auto Glass Urethane Windshield Adhesive, 08693, 10.5 fl oz Cartridge, Black

Product ID: 7419342

Details

Brand
3M
Item Form
Cartridge
Material
Urethane
Special Feature
Strong
Specific Uses For Product
Windshield

⚡Fast 24-hour cure

🔩1200 psi tensile strength

🖤Medium-viscosity, non-sag formula

SAR 129

Duties & taxes included

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Description

🛠️ Bond like a pro, drive with confidence.

RAPID 24 HOUR BONDING - Get your windshield road-ready in just one day—no downtime, no delays.
UNIVERSAL COMPATIBILITY - Works seamlessly with manual or powered caulking guns—flexibility that fits your workflow.
INDUSTRIAL GRADE STRENGTH - 1200 psi tensile strength ensures a permanent, rock-solid hold you can trust.
WATER RESISTANT DURABILITY - Engineered to withstand the elements, keeping your windshield secure rain or shine.
CLEAN PRECISE APPLICATION - Medium-viscosity urethane formula prevents sagging for a flawless, professional finish.

3M Auto Glass Urethane Windshield Adhesive (08693) is a professional-grade, black urethane adhesive cartridge designed for permanent windshield bonding. It cures rapidly within 24 hours, delivers a tensile strength of 1200 psi, and features a medium-viscosity, non-sag formula for clean application. Compatible with manual and powered caulking guns, this water-resistant adhesive meets the demanding standards of industrial auto glass repair and restoration.

Specifications

ASIN	B000RW1XCK
Best Sellers Rank	#7,340 in Automotive ( See Top 100 in Automotive ) #18 in Body Repair & Restoration Adhesives
Brand Name	3M
Color	Black
Compatible Material	Glass
Container Type	Cartridge
Customer Reviews	4.5 4.5 out of 5 stars (5,154)
Full Cure Time	24 hours
Global Trade Identification Number	00051131086937
Included Components	Other Vehicle Parts( AUTO_PART ), Performance Parts - Underhood, Engine Parts/Gaskets/Seals/Bearings
Item Form	Cartridge
Item Package Quantity	1
Item Type Name	3M Auto Glass Urethane Windshield Adhesive
Item Weight	14.56 ounces
Manufacturer	3M
Material Type	Urethane
Model	08693
Number of Pieces	1
Other Special Features of the Product	Strong
Part Number	08693
Specific Uses For Product	Windshield Adhesive
Tensile Strength	1200 psi
UPC	051135086933 060829190559 051131086937
Unit Count	10.5 Fluid Ounces
Viscosity Level	Medium
Volume	10.5 fluid ounces
Warranty Description	Manufacturer Warranty
Water Resistance Level	Water Resistant

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