Rigid polyisocyanurate foam panels

HMIS® ratings

1 0 0 - Minimal (insignificant)

NFPA Ratings

1 0 1 – Slight 2 – Moderate 3 – Serious (high) 4 – Severe (extreme) 5 – Chronic Health Effort(s) No unusual conditions are expected from this product. Freshly expanded or heated foam may off-gas some pentane-blowing agent, which is heavier than air and may accumulate to ignitable concentrations if stored inside a sealed container or within confined areas. Ignitable atmospheres have concentrations that exceed inhalation exposure limits for workers, further reinforcing the need for ventilation when foam is freshly expanded. With the exception of the blowing agent, Atlas foam roofing products do not present an inhalation, ingestion, or contact health hazard unless subjected to operations such as sawing, sanding, or machining that result in the generation of airborne particulates (dusts). Exposure to high dust levels may irritate the skin, eyes, nose, throat, or upper respiratory tract. Inhalation of high amounts of dust over long periods may overload lung clearance mechanisms and make lungs more vulnerable to respiratory disease. [See Section 3 of this SDS for other exposure limit standards for the product ingredients.] Canadian users: LD50 and LC50 data are listed below for those constituent(s) that data is available. LC50 LD50 Hodge & Sterner Sterner classes mg/(m3 air) mg/(kg body wgt) (inhalation) (oral) Pentane 364,000 (rat, inh, 4hr) 446 (mouse, i.v.) relatively harmless insufficient data Calcium relatively carbonate Not available 64,500 (rat, oral) insufficient data harmless Formaldehyde 400 (mouse, inh, 2hr) 42 (mouse, oral) moderately toxic 100 (rat, oral)

Potential health effects

Primary Means of Exposure: Inhalation of particulates Secondary Means of Exposure: Eye and skin contact with particulates and inhalation of vapors INHALATION HEALTH HAZARDS: For polyiso foams (generated dust and residual vapor) Acute: Dust may cause transient mechanical irritation of the upper respiratory tract. Workplace exposures to residual pentanes from this product are expected to be below levels of any health risk. Overexposure to high concentrations of pentane can cause narcotic effects. Signs and symptoms of overexposure to pentane include headache, nausea, dizziness, difficulty walking, or sleepiness. Studies have shown that short-term (10-minute) exposures to pentane concentrations as high as 5,000 ppm (11,750 mg/m3) produced no symptoms. Workplace exposure limits are provided in table below. Chronic: There is no evidence that dust from polyiso foam causes disease in humans, and no chronic effects are known for exposures to pentane. For continuous filament glass fibers in facers (generated dust) Acute: Airborne fragments of glass fibers may cause mechanical irritation of the upper respiratory tract, particularly mouth, nose and throat; glass dust may cause transient irritation of the upper respiratory tract. Workplace exposure limits are provided in table below. Chronic: No chronic health effects are known to be associated with exposure to glass fibers. Results from epidemiological studies have not shown any increase in respiratory disease or cancer. The International Agency for Research on Cancer has classified continuous filament fiberglass “Not Classifiable as to Carcinogenicity to Humans” (Group 3). For limestone and latex in facers (generated dust) Acute: Dust may cause transient mechanical irritation of the upper respiratory tract. Workplace exposure limits are provided in table below. Chronic: There is no evidence that dust, containing limestone or latex, causes disease in humans. EYE CONTACT HEALTH HAZARDS: Acute: Mechanical irritation, redness, tearing, and blurred vision can occur if dusts generated from these products come into contact with eyes. Chronic: None known. SKIN CONTACT HEALTH HAZARDS: Acute: Direct contact with rough-cut foam or facers can cause mechanical abrasion cuts or puncture to fingers, hands or exposed skin. Chronic: None known. SIGNS AND SYMPTOMS OF EXPOSURE: Irritation of the upper respiratory tract, eyes, and/or skin.

Medical Conditions Generally Aggravated by Exposure

Any condition generally aggravated by mechanical irritants in the air or on the skin. Specific data are not available which address medical conditions that are generally recognized as being aggravated by exposure to this product. CARCINOGENICITY: Ingredient: Textile Fibrous Glass NTP: Not Listed IARC: Not Classifiable – Group 3 OSHA: Not Listed Mutagenicity: None

Teratogenic Effects

None Reproductive Toxicity: None California Proposition 65: Known to the State of California to Cause Cancer. This warning is provided in accordance with the California Safe Drinking Water and Toxic Enforcement Act of 1986.