A material safety data sheet on this product is available from Pro-Tech Products, Inc. upon request. Users of this product should read and understand the MSDS before use.

Protective Equipment
Spraying of polyurethane foam results in the atomizing of the components to fine mist. Inhalation and exposure to the atomized particles should be minimized. The following protective equipment is recommended:

a. Fresh air, full face mask or
hood with fresh air source.

b. Fabric coveralls

c. Fabric gloves

Physical Examination of Personnel
All personnel to be employed in the spraying of these materials should have a complete physical examination prior to starting spray operations. Periodic checkups are recommended if the personnel continues to spray these materials. Personnel with the following conditions should avoid the spraying of these components:

a. Asthma or chronic bronchitis.

b. Chronic respiratory disorders.

c. Sensitization to chemical substances including polymeric isocyanates.

Outdoor Application Precautions
The area surrounding the
spray operation should be protected from overspray and exposure of individuals not involved in the spray operations as follows:

a. Post warning signs a minimum of 100 feet from all work areas.

b. Close all air intake vents on air handling equipment on the building.

c. Limit spectators to a minimum.

d. No welding, smoking or open flame.

Indoor Application Precautions
Indoor applications are generally more hazardous than outdoor applications. All personnel in the spray area must be equipped with a fresh air supply mask or hood. Additional precautions include:

a. Seal off the work area from adjacent rooms and ventilation ducts.

b. Restrict the access of non- application personnel.

c. No welding, smoking or open flame.

Dermal Exposure
If a major splash or spill of the isocyanate component comes in contact with the skin, the affected area should immediately be washed with copious amounts of water from a safety shower or other water source. Contaminated clothing should be removed and the skin wiped with a clean dry cloth to remove residual isocyanate. The
affected area should then be wiped with a 70% solution of rubbing alcohol (isopropanol) followed by repeated washing with soap and water. If a rash develops, a physician should be consulted immediately.

FREIGHT CLASSIFICATION

B Component - Resin Compounds Item 46030, Class 55, NOIBN Non-Hazardous

A Component - Resin Compounds Item 46030, Class 55, NOIBN Non-Hazardous

"As an Energy Star Roof Products Partner, Pro-Tech Products, Inc. has determined that this product meets the Energy Star guidelines for energy efficiency."

1. PRODUCT NAME

PRO-TECH SPRAY POLYURETHANE FOAM
SPRAY SYSTEM P-2.8 for roofing applications

2. MANUFACTURER

PRO-TECH PRODUCTS, INC.
3003 N. 73rd Street
Scottsdale, Arizona 85251
Phone: 480.945.7303
FAX: 480.945.8873
www.pro-techproducts.com

3. PRODUCT DESCRIPTION

PRO-TECH URETHANE P-2.8 is a two-part system designed for roofing applications where the compressive strength (55 psi) provides a greater resistance to foam fracture than is offered by foams of lower density. PRO-TECH Urethane P-2.8 has been formulated with HFC 245 FA as the blowing agent.

BENEFITS:

• Highest R-value of any insulation material
• Seamless, monolithic barrier that prevents air and water infiltration
• Self-flashing thus eliminating seams and cold joints, the main source of roof leaks
• When appropriate, there may not be the need to tear off existing membranes, offering cost and logistic advantages

4. TECHNICAL DATA

See TABLE 1.

RATINGS & APPROVALS

See Technical Data - Table 2

5. INSTALLATION

• Power broom and vacuum all loose gravel, dirt and other foreign objects from the roof’s surface

• Examine roof for areas where cold applied materials may have been used. Remove these materials from any areas that have been applied in excessive amount or still remain tacky

• Cut out all blistered areas, de-laminated areas and damaged or wet roof insulation prior to application of new materials

• Metal surfaces to be spray foamed shall be free of dust, loose scale, rust, dirt, grease, oil or any other contaminant

• Prime roof surfaces, if appropriate, with PRO-TECH Acrylic Prime roof primer at the rate of ¼ to ⅓ gallons per 100 square feet

• Mask all areas on the immediate roof, and all adjacent areas that are intended to remain uncoated. Mask all edges to assure straight and neat edges and terminations

• If necessary, air conditioners and other roof mounted mechanical equipment shall be raised to access and thoroughly foam and coat the roof underneath. A 24” minimum access is
required to correctly address these areas. Any deterioration of sleepers, frames, seals, gaskets or pans will require replacement.

• For application details see specific Guide Specifications

6. AVAILABILITY AND COST

PRO-TECH URETHANE P-2.8 may be purchased directly from Pro-Tech Products, Inc. For information, call 800-538-7303.

7. WARRANTY

No specific warranties implied. Various warranties are available for specific Pro-Tech Products coatings and roofing systems when applied by licensed contractors and inspected by authorized PTP personnel. It is the responsibility of the licensed contractor to ensure that all products are used in the accordance with federal, state and city codes. This includes but is not limited to building and fire codes.

8. MAINTENANCE

Periodic maintenance of Pro-Tech Products coatings and roofing systems ensures extended performance and reduces life cycle costs.

9. TECHNICAL SERVICES

Additional information, product brochures, and guide specifications are available. Customized application instructions are also available from our technical experts.

10. FILING SERVICES

Additional product information is available from Pro-Tech Products, Inc.

DESCRIPTION
This system is a spray able rigid polyurethane foam insulation system designed to insulate and aid in waterproofing construction surfaces. The product results in a seamless, mono-lithic and durable insulation system.

Pro-Tech Products, Inc. spray systems are technologically advanced, sophisticated materials and should only be applied by qualified, experienced spray applicators.

SUBSTRATE PREPARATION
For optimum results, surfaces to receive foam should be clean and dry, free of dirt, oil, solvent, grease, loose particulates, peeling coating and other foreign matter.

Ferro metallic substrates (especially mild steel) should be sand blasted in accordance with SSPC-SP6. Sand blasted surfaces should be immediately primed with an epoxymide primer as recommended by the manufacturer.

Galvanized and stainless steel surfaces should be treated with an appropriate wash primer prior to application of urethane foam. Consult your primer manufacturer for specific recommendation. New plywood and other new wood surfaces should be primed with an acrylic primer as recommended by the manufacturer.

Concrete surfaces may require priming, especially if the moisture content is greater than 10% as determined by a moisture meter. Lightweight concrete decks are generally unsuitable substrates for application of urethane foam due to high moisture content. FOR BEST RESULTS, ON SUBSTRATES WHERE THE MOISTURE CONTENT CANNOT BE DETERMINED, A SUITABLE PRIMER IS RECOMMENDED.

SUBSTRATE TEMPERATURE
This spray system is provided in different reactivity profiles to meet varying substrate temperatures previously noted. At the lower end of the recommended temperature range, flash passes are to be avoided. PTP Technical Personnel should be consulted in all cases where application conditions are marginal.

CLIMATIC CONDITIONS
Spray Systems should not be applied
when the wind velocity is greater than 15 M.P.H. to avoid over spraying of perimeter areas. Higher wind speeds also retard the exothermic reaction of foam and can lead to poor adhesion and increased density as well as poor surface texture of the foam itself.

Moisture in the form of rain, dew, frost or other sources can seriously affect the adhesion of urethane foam to the substrate or to itself. Water reacts with the mixed foam components, seriously affecting the foam's physical properties. PTP does not recommend the spraying of this system when the relative humidity exceeds 85%.

EQUIPMENT:
The proportioning equipment shall be manufactured by Gusmer, Graco or Ransburg and shall be capable of metering each component within ± 2% of the metering ratio previously noted. The gun should be of the internal mix type which provides intensive and thorough blending of the components. The equipment shall be of the heated airless type capable of maintaining 130° F at the gun by use of both primary heaters and heated hoses. The use of 2:1 feeder pumps is recom-mended for supplying the liquid components to high output pro-portioners such as the Gusmer-H-II, especially for winter operations. Dry nitrogen should be employed to blanket the liquid components, especially when tanks are employed to store the com-ponents. Components are adversely affected by moisture and humidity.

SPRAYING
This spray system should be applied in uniform passes from 1/2" to 1" in thickness. The thickness of each pass is dependent upon the temperature of the substrate, the speed of application and the output of the proportioning unit and gun. It is desirable for the foam to be built to the final desired thickness before moving to another area. Foamed surfaces which have not been built to final thickness within 24 hours may require the application of a bonding primer prior to the application of additional foam to assure adequate adhesion. Thin passes (1/4" or less) should be avoided. They may result in reduced yield and loss of adhesion.

Urethane foam must not be applied to thickness exceeding 4 inches in 24 hours. If this thickness is exceeded, the temperature buildup within the foam may cause internal charring of the
foam applied, seriously affecting the quality and physical properties of the
foam. Under certain conditions, applications exceeding this maximum recommended thickness may cause spontaneous combustion of the foam to occur, often hours after the foam was applied.

PROTECTIVE COATINGS
Sprayed polyurethane foam insulation produced from these resins is susceptible to attack by ultraviolet light from the sun's rays, and must be covered by a protective coating. An appropriate coating system also protects the foam from mechanical damage as well as providing additional waterproofing protection. A number of coatings are available to the applicator including acrylic, cementitous and others. Selection of a coating is dependent on such factors as cost, resistance to foot traffic, resistance to ponded water, fire resistance and the existence of vapor drive. When a vapor drive exists in a structure (either in or out) vapor barrier coating system should be employed. Consult PTP Data Technical Service Personnel for specific system recommendations.

WARNING: POLYURETHANE FOAMS WILL BURN WHEN EXPOSED TO FIRE. The protective coating may also burn when exposed to fire.

FIRE AND THERMAL BARRIER
Polyurethane foam produced from these materials may present a fire hazard if exposed to fire or excessive heat (i.e. cutting torches). The use of exposed polyurethane foam in interior applications on walls or ceilings presents an unreasonable fire risk unless protected by an approved fire resistant thermal barrier with a finish rating of not less than 15 minutes. A code definition of an approved "thermal barrier" is a material equal in fire resistance to 1/2" gypsum board.

STORAGE OF RAW MATERIALS
All materials should be stored in their original containers and away from heat and moisture, especially after the seals have been broken and the materials have been opened. Both components should be stored indoors at a temperature between 50° F and 75° F. Temperatures above 75° F may decrease the shelf life. Containers should be opened carefully to allow any pressure buildup to be vented safely. Under proper storage conditions these chemical systems have a shelf life of 6 months. Do not vent containers. This will affect yield and density of the system.