I've looked over the entire container and see nothing stating that it cannot work on Plexiglass. I've used it three times now, only on glass. If I had a Plexiglass window to install, I'd certainly give it a try. I don't think this has any solvents that will adversely effect the Plexi. I would be very careful with the adhesion promoter, if you use it. It will likely etch the Plexi if it comes in contact with an area you intend to see through. My only thing to add is, this stuff holds very well. Plexi tends to shrink and expand. If whatever you attach this on does not shrink and expand, your plexi will likely break with a sharp temperature change. I hope this helps.

3M 08609 Windo-Weld Super Fast Urethane Cartridge 10 oz

Q: Can this be used to put in a back glass of a convertible?

Hi Adam! Thank you for your question. No, the 3M 08609 Windo-Weld Super Fast Urethane is not the appropriate product for your application. We would suggested contacting the convertible top manufacturer for a product recommendation.

Q: What kind of chaulk gun to use?

A good 10oz chalk gun that will regulate the flow controlled and evenly. Do not get a $3 gun. Look for a "Professional". The battery electric ones would be best, but they're expensive and I don't think are necessary. A hand trigger gun will require a little trimming after you're done. Plan to trim the window-weld before it fully cures (~1hr after you apply it). Last thing, prep your surfaces with 3M single step primer 08682.

Q: Can this be used to patch a gas tank?

Hi Miguel! Thank you for your question. No, the 3M 08609 Windo-Weld Super Fast Urethane would not be the appropriate product for your application. We would suggest reaching out to your vehicle's manufacturer for a product recommendation.

4.3/5

Product ID: 255136953

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Details

Colour
Black
Brand
3M
Liquid volume
10.5 Fluid
Item form
Paste
Surface recommendation
Window

⚡Super fast curing

🔧Precision cartridge design

🖤Deep black urethane

Frequently Bought Together

3M 08609 Windo-Weld Super Fast Urethane Cartridge 10 oz

3M Single Step Primer, 08682, Black Color, One-Part Urethane, UV Resistant, 30 mL/1.01 fl oz

Brixwell Suction Cup Clamps Glass Clamp for Convertible Top Body and Windshield Repair Suck-N-Clamp Set 6 Pack

Description

⚡ Seal it fast, seal it right — the pro’s choice for flawless window bonding!

RAPID CURE TIME - Get your windows sealed and back on the road faster than ever.
SLEEK BLACK FINISH - Professional-grade black urethane that blends seamlessly with any vehicle.
TRUSTED 3 M QUALITY - Backed by 3M’s industry-leading innovation and reliability.
USER FRIENDLY CARTRIDGE - Ergonomically designed 10 oz cartridge for precise, mess-free application.
DURABLE WEATHER RESISTANT - Engineered to withstand harsh weather and keep your seals intact.

The 3M 08609 Windo-Weld Super Fast Urethane Cartridge delivers a rapid-curing, deep black urethane sealant in a convenient 10 oz cartridge. Designed for professional automotive window installation, it ensures durable, weather-resistant bonds with precision application, backed by 3M’s trusted quality.

Specifications

Manufacturer	3m Auto Products
Brand	3M
Product Dimensions	4.83 x 4.83 x 22.86 cm; 399 g
Item model number	08609
Manufacturer Part Number	8609
Item Weight	399 g

Have a Question? See What Others Asked

Can this be used to put in a back glass of a convertible?

What kind of chaulk gun to use?

Is ok for plexiglass

Can this be used to patch a gas tank?

Common Questions

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3M 08609 Windo-Weld Super Fast Urethane Cartridge 10 oz

Details

Description

Specifications

Have a Question? See What Others Asked

Common Questions