Weatherproof Coatings & Paints

Perhaps consult a glazier, or perhaps 3M Sign Vinyl. Does it have to be transparent? Could you provide a little more information, ie: is the glass flat?

I live in South Texas where the Summer Heat is ten months long...

my vinyl letters that I put on about one year ago have already

curled off like a bunch of potato chips roasting in a commercial

conveyor oven!! ... I'm looking for a long-term enduring, &

obviously HEAVY DUTY solution!!... Vinyl letters in my environs

is a waste of moola...'nuf said.

the paint is not what is important, it is the primer. paint is engineered to adhere to primer or paint, not substrates directly. zinsser is a primer company that produces a primer, either 123 or bin,that is guaranteed to adhere to virtually everything. the coating applied to it, if done correctly, should hold. primer alone will not withstand uv rays so it does need to be top coated. do not use any high tech epoxys but two part urethanes would be suitable, if compatible with the primer. a simple, quality water based enamel, if applied correctly, would last up to 10 years. go to home depot or any quality paint store and they should carry it. do not use what a paint store would recommend if different than what I am telling you as they have a vested interest in selling you what they want to sell, not necessarily what would work the best. I have been painting professionally for over 35 years and have not found anything better.

The purpose of glass is to let light through. Painting it defeates that objective!

What is the purpose of this glass coating? Must you coat on the outside rather than the inside. Do you need to see through this coating or will it be opaqe?

This painting project on glass is for my commercial advertising

of my website on the back curved windshield of my van!!...I

want my paint to endure the elements while catching potential

customers' eyes!!! Painting the inside of the glass would be

a less-desired option in my opinion.

My website addy is http://SteveNiersDesignServices.Biz

I would suggest fluorourethane or conventional acrylic urethane with an etch prep. The etch would be an acid. The fluorourethanes have a low refractive index.

check www.geoenvirogroup.com

Spandrel glass in commercial glazing applications is "natural" (uncoated) on the exterior side, while the interior side has a factory-applied layer of opaque plastic film in the colour of your architects choice. What distinguishes this plastic film is that the colour side IS at the adhesive side - which is not the case with sign vinyl.

Plastic film is the 'usual' way to render glass opaque and with colour. The service life is counted in multi-decades.

Paint can be used on the non-weather side with good results. I have used high solids latex paint on the backside of glass used in this manner. The paint remains stuck very well. I suspect that it would peel, if subject to high operating temperatures. But I have some that are 10 years old and working well.

If you must coat the weather side then sign vinyl is a very good option in the 5 to 10 year service life range. On the weather side it will probably be better than paint.

D

I see that people are trying to help you, but the question that remains appears to be: Why do you want to "paint" over glass? Glass is about the best weatherproof substance you can find. As someone pointed out, the purpose of glass is to see thru it, provide light, etc. Polyurethanes are a possibility, but be sure you use either a PTMEG-polyether based or a polycarbonate based aliphatic polyurethane, either a 2k system or a solvent based liquid system. These can be clear and light-transmitting. An effective way to gain adhesion to glass is to add about 2 % of a functional silane to the "paint" before application. Butyl rubber or EPDM "paints" would give you long service life, but they will be opaque. It's difficult to give specific answers as your question is so vague. Do you want an opaque coating? Weather conditions? How will the "paint" be applied? Where are you, sub-tropical or tropical conditions? How thick is the glass to be coated? Try and think of all the problems your coating will encounter, why you are using the paint/coating, list them, and then ask for help.

Hello Neir Design Owner,

Cardio 2 is right... I am guessing if you are looking for a waterproof paint (or clear coat if you want to see thru) it's going to be for an immersion service and your smooth glass surfaces is in fact smooth and shiny like glass but it's not glass and having an original design...

Are you looking for a paint having excellent graffiti resistance and exceptional weatherabilty?

Fluorourethane or modified siloxane (clear coat or solid colors) will work if it's not an immersion service and should last at least 20 years. I hope you got a nice budget: these are expensive paint but will last for long, on the run long they become cheap.

Like all the others said: be more specific of your needs and the environment your parts goes. What material are you using?