Ask the Expert Question-and-Answer Archive

by Ron Joseph

January, 2004

Intumescent Paints

Q. Is it possible to get a one (1) hr. rated assembly with Intumescent paint on steel bar joists and a 22 ga. type 'B' metal roof deck?

A. Thanks for your question. If you can't remove the paint physically, either by scraping or sanding, you can use a chemical paint remover. Be aware that paint removers are messy and you might be getting yourself into a very messy situation. Also, if you decide to use a paint remover , please carefully read all the instructions on the label of the can.

If you remove all the loose an flaking paint from the wall, you might not need to remove the tight adhering paint. Instead, you might be able to paint right over it, but I suggest that you experiment and try it first.

Health and Safety
Please be aware that coatings and solvents are chemiclas and therefore you should always pay attention to proper handling procedures and be prepared to wear protective clothing, such as respirators,gloves, coveralls, etc., and always be sure that your work area is well ventilated.

For further information on the health and safety requirements for the coatings and solvents you wish to use we strongly advised you to contact your local coating supplier and obtain a copy of the Material Safety Data Sheet (MSDS). If possible, go the extra step and look for this information on the website of the product vendor.