www.pruett-schaffer.com

 

PRODUCT NUMBER

PRODUCT NAME

29-11

WHITE WATERBASED LATEX ROOF PAINT

 

GENERAL DESCRIPTION

 

Pruett-Schaffer’s #29-11 White Paint is an air-drying, water based elastomeric acrylic emulsion paint.  It is designed as a long lasting  spray applied, water tight,  seamless membrane coating system.  It offers a cost-effective alternative to other more expensive roofing systems, while  still weathering  well and delivering  superior protection for years.  The coating allows high film build without sags and good reflectance properties that will reduce overall cooling costs. It exhibits all of the desirable properties of standard water based products such as  low VOC, toxicity and odor with non-flammability and soap and water cleanup. Excellent   adhesion to a wide variety of substrates and superior long term flexibility gives 29-11 versatility.  It may be used when installing a new roof or to repair existing roofs.

 

RECOMMENDED USES

 

This product is recommended for new installation over metal, concrete and masonry, wood roofs and decks, EPDM products, asphalt  roll roofing and shingles, slate, terracotta tile, aluminum and copper flashing.

It may be used for repair of  metal roofs, leaking seams in weathered rubber roll roofing, for patching gutters and for waterproofing leaking shingles and flashing.

Not recommended for use over Teflon materials, smooth concrete, NEW roll rubber roofing, areas where water will pool for long periods of time, or solvent exposures. Use where long term exterior durability , water resistance, and flexibility is required. 

 

 

 

 

 

 

 

 

 

 

 

 

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CLEANUP

 

Clean equipment with warm soap and water before the film dries.

 

 

DRYING TIME

 

Dry time will depend on substrate temperature, relative humidity, wind and solar conditions, and film thickness. A 23 mil-wet film will cure in approximately 2-4 hours at 77 deg F. and 60% relative humidity, but may not be walkable at this point!  Full cure for a walk-on recoat is normally achieved overnight under normal conditions, but cold weather or high humidity may lengthen this cure time.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SURFACE PREPARATION

 

 At a minimum for acceptable performance, all surfaces to be coated must be mechanically sound and free of oil/grease, loose rust/paint, organic debris and moss. Soiled roofs should be power washed or brushed with a water solution of trisodium phosphate (TSP) rinsed thoroughly with clean water, and allowed to dry. This coating will adhere well to slightly damp surfaces (not pooled water) as any water will be readily absorbed into the coating. Bare metal surfaces or rusted areas should be cleaned and primed with a rust inhibitive roof primer(P-S 20-13562 Red Oxide Primer).

Heavily rusted metal must be wire brushed or blasted, then cleaned and primed. Painted metal surfaces must be in good condition; remove any loosely adhering paint and spot prime.  This product may be applied directly to aluminum without a chemical pretreatment. Adhesion to aged concrete and masonry surfaces is excellent but they should still be power washed. Newly poured concrete with a smooth surface must have form release oils and curing membranes removed and may require priming, etching or other pretreatment. Contact a P-S representative for specific recommendations. Gravel roofs may be repaired by covering the entire area with plyscore mechanically attached through the deck, then coated using membrane  as with wood.

 

THINNING

 

Under normal conditions no thinning is necessary or desirable.  Thin if necessary with water only, do not use organic solvents or oils.  Add water a little at a time with constant gentle agitation to a maximum of 5% by volume.

 

 

 

 

 

 

 

 

 

 

 

 

 

ENVIRONMENTAL

 

This product meets current air pollution regulations regarding hydrocarbon and ozone reactive emissions.  It contains no lead, chromate, or zinc.

 

PHYSICAL PARAMETERS

 

VOC, ASTM D-3960: .74  lb./gal

WEIGHT PER GALLON, ASTM D-1475:          

10.89 lbs.

NONVOLATILE:

By weight:     56.3 +/- 2.0 %

By volume:   43.5 +/- 1.0%

THEORETICAL COVERAGE:

70 ft2/gallon/10mil, dry film

INITIAL GLOSS, 600, ASTM D-523: 10-20

VISCOSITY, ASTM D-562:

108-118 Krebs Units

FLASH POINT, PENSKY-MARTINS CC:

Ø       141 0F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

APPLICATION EQUIPMENT

 

May be applied by brush, roller, or airless spray.  Airless spray gives the best results, and is highly recommended for large jobs. Use a 30: 1 ratio drum or pail pump with a 3-4 gallon per minute capacity, a hydraulic metal braid hose with a working pressure of 4000 psi, and a .028-.040 inch  reverse-a-clean tip . Use roller covers with 3/8 to 1/4-inch nap.  Brushes should be of polyester or nylon construction.

 

APPLICATION INSTRUCTIONS

Note: do not  apply when air or substrate temperature is below 50 deg. F. Protect from rain & heavy foot traffic until completely cured. Mix well before use.

A fully cured roof of 20-25 mils dry film is desired, and is usually applied in 2 coats. Reinforcing membrane may or may not be incorporated, as desired. Apply Latex Roof Coating to the prepared surface at a coverage rate sufficient to provide 23 mils of wet film build, which is equal to 10 mils of dry film.

 

DO NOT apply at film builds exceeding this recommendation because the coating may skin at the surface only, trapping solvent or water beneath and shortening the service life. Heavier than recommended applications will also result in very slow cure times and possible adhesion problems. If installing membrane, apply it after the first coat. Overlap all seams, and brush or roll membrane gently into the wet coating. Allow the coating to cure before applying subsequent coats. When coating wood, thin the first coat approximately 5% by volume to insure penetration into the surface. Follow with a second coat at full strength, then install the membrane. Apply a third and final undiluted coat.

 

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THIS INFORMATION RESULTS FROM TESTS CONDUCTED IN A LABORATORY UNDER LABORATORY CONDITIONS.  DIFFERENT RESULTS MAY BE OBTAINED IN COMMERCIAL USE OF THIS PRODUCT UNDER FACTORY OR FIELD CONDITIONS.  PRUETT-SCHAFFER MAKES NO WARRANTY CONCERNING THE SUITABILITY OF THIS PRODUCT FOR THE END USE CONTEMPLATED BY THE BUYER, EXCEPT THAT THE PRODUCT SHALL BE IN COMPLIANCE WITH THE TECHNICAL SPECIFICATIONS PRESENTED HEREIN.

 

QC IDENTIFIER: E26

REVISED 05-25-2000