For those who have redone passenger car roofs, recognizing our heat and the fact that "historical" appearance isn't a primary concern but a long lasting job is, can anyone recommend a roofing treatment for a steel roof?

Jim

PSRM
Jim@psrm.org

-Thoroughly clean the steel being sure to remove all traces of tar, rubber, oil, rust, etc. So you should have only clean steel or well-adhering paint.
-Prime with Wasser Miozinc. As an added benefit, Miozinc will encapsulate lead coatings.
-Top coat with Wasser MC Luster (black)
-Wasser will color-match their urethanes but there is a $100 fee. Black is the only standard color for MC Luster.
***Be sure to wear appropriate personal protective gear. Wasser products are single component moisture-cure urethanes and contain isocyanates.***

We've tried many different ideas and so far this is the best-performing system.

Richard R. Anderson
Northwest Railway Museum

http://www.trainmuseum.org
rra@trainmuseum.org

Urethanes that contain isocyanates have a warning on the can. Simply stated that this will cause irreversable brain damage. Don't mess with this stuff thinking that because you are outside that it wont hurt you. The appropriate gear is a remote air breathing apparatus

Valid point. As with many hazardous materials used in collection care, misuse can result in serious consequences. Most commercial products do not list all the hazards on the can - you need to consult with the applicable MSDS (Manufacturer's Safety Data Sheet). Isocyanates are known to cause respiratory problems including asthma, and a self contained or air supply breathing apparatus is strongly recommended. The risk associated with paints containing isocyanates is astronomically greater when spraying versus brushing or rolling but even then they present a health and safety hazard. And their presence in paint is nothing new. Centari, Imron and Delstar are just a few paints that also contain isocyanates - every polyurethane contains them.

Every work environment is different and it is ultimately your (the user) responsibility to ensure your safety. Want more information? Check out OSHA's page: http://www.osha.gov/SLTC/isocyanates/

> Urethanes that contain isocyanates have a
> warning on the can. Simply stated that this
> will cause irreversable brain damage. Don't
> mess with this stuff thinking that because
> you are outside that it wont hurt you. The
> appropriate gear is a remote air breathing
> apparatus


http://www.trainmuseum.org
rra@trainmuseum.org

Can install without the risk of killing themselves, please.

Example - how does Henry's #220 Alumintex work?

PSRM
Jim@psrm.org

We have been using Weather Barrier 1650 applied directly over a cleaned up or primered surface. It is an elastomeric roof coating, and has a nifty flashing compound (1750) / fiberglass tape combo that can be used to seal things up and make repairs.

The 1650 is fairly thick (not unlike Henry's aluminum trailer coat)and so it it good for coating uneven surfaces. Nothing toxic either. It is available in some standard colors and they even matched a red/brown color sample for us.

I found out about this stuff from NCTM during the ARM convention a few years ago. They were buying it through Pioneer Randustrial at the time, but I found out that Weather Barrier is the actual manufacturer.

The only disadvantage is that it is a matte as opposed to gloss coating. Looks fine on your older steel pullman roofs and over streetcar canvas / roofing paper roofs, but I wouldn't neccesarily use it on a car that is receiving a complete "factory new" restoration paint job.

Parker Paints also makes an elastomeric coating that is similar.

http://www.fhpaint.com/weatherbarrier/d ... ducts.aspx

> For those who have redone passenger car
> roofs, recognizing our heat and the fact
> that "historical" appearance isn't
> a primary concern but a long lasting job is,
> can anyone recommend a roofing treatment for
> a steel roof?

> Jim


OERM
jsmatlak@earthlink.net