Product description Flexiprene 1000 is a one-part, moisture-cure, environmentally friendly, polyurethane sealant that cures rapidly to a durable, medium-modulus, flexible, weatherproof sealant. The cured sealant adheres well to most common substrates such as masonry, concrete, glass and aluminum without priming and shows excellent adhesion to most types of plastic. Basic uses Flexiprene 1000 can be used for exterior and interior caulking the perimeters of frame openings; expansion, control and isolation joints; coping and coping-to-facade joints; cornice and wash joints; panels; poured-in-place; tilt-up; underside of precast planks; steps and risers; top of nonloadbearing walls; glazing, etc. It is also suitable for various manufacturing uses, such as production of travel trailers and mobile homes, extruded PVC windows and doors, and many other OEM applications. Benefits • Contains no TDI (toluene diisocyanate) or VOC (volatile organic solvents). • Excellent adhesion to wide range of substrates. • Excellent weatherability and durability. • Low odor. Application limitations • Do not apply over damp or contaminated surfaces or in hot, humid weather conditions as the sealant will bubble or foam if applied during these conditions. • Do not apply to absorptive surfaces such as marble, limestone, or granite without prior testing for discoloration or staining. • Use only at temperatures of 40°F (4°C) and rising. • Maximum joint width is 1-1/2" (38 mm). Colors Limestone. Custom colors available; minimum order 100 gallons. Packaging Available in 10.3 fl. oz. (305 ml) polyethylene cartridges, 12 cartridges per carton. Also available in 2-US-gallon (7.6-liter) pails, 5-US-gallon (18.9-liter) pails and 55-US-gallon (208-liter) drums on special order. Applicable standards Flexiprene 1000 meets or exceeds the requirements of Federal Specification TT-S-00230C, Type II, Class A; ASTM C920-87 Type S, Grade nS, Class 25, use NT, G, M, A, and O; AAMA 802.3 and 805.2; CAN/CGSB 19.13-M87. Installation Joint design: The width of the joint should be a minimum of 4 times the anticipated movement. In joints up to 1/2" (12 mm) wide, the depth of the sealant should be equal to the width, but not less than 1/4" (6 mm). In joints wider than 1/2" (12 mm), the depth should be maintained at 1/2" (12 mm). Maximum joint width is 1-1/2" (38 mm). For butt joints, see PSI's Joint Design Chart for recommended joint designs for specific building materials. Lap shear joints should have a width of at least twice the anticipated movement. Surface preparation: Joints to receive sealant must be sound, smooth, uniform in dimensions and free from defects and foreign materials. They must also be clean, dry, free of frost and all contaminants, such as waterproofing sealers, curing compounds, coatings, etc. To test adhesion, apply a sealant bead and allow to cure thoroughly. Then pull one end of the bead to test adhesive strength. Priming: Flexiprene 1000 has excellent adhesion to most common firm and uncontaminated materials. In some applications it may be prudent to use a primer on substrates such as concrete which are frequently wet, friable or sandy, and some plastics. For porous surfaces, PSI-591 Primer is recommended. The primer should be allowed to dry for about 2 hours before applying sealant. For non-porous surfaces, PSI-590 Primer is recommended. Sealant can be applied after a 15-minute drying time. Primer should be applied

only to clean, dry surfaces prior to installation of backer rod, bond breaker tape, and sealant and should be kept within the confines of the joint to avoid staining adjacent surfaces. See data sheets and SDS for PSI-590 and PSI-591 Primers for more detailed information. PSI's laboratory will conduct adhesion tests on submitted substrates and provide a written report. Backup material: The purpose of backup material is to regulate the depth of the joint; to provide a surface against which the sealant is compressed when tooled, thus promoting better adhesion to the side walls; and to provide a...

high temperatures or other ignition sources. Refer to manufacturer's SDS for proper safe-handling precautions. Shelf life: One year from date of shipment when stored in original, unopened container in a dry area at temperatures below 80°F (27°C). Maintenance If the sealant is damaged and the bond is intact, cut out the damaged area and recaulk. No primer is required. If the bond has been affected, remove the old sealant, clean and prepare the joint in accordance with the instructions under “Surface Preparation” and recaulk. Technical services PSI provides performance data, specification assistance...