ULTRA BLOCK™ is excellent for use on most any interior or exterior surface such as adobe, primed aluminum, asbestos, brick, clapboard, clay, primed copper, concrete, galvanized, masonry, tin, plaster, wood, plywood, aged pressure treated lumber, cedar, T-1-11, Douglas fir, pine, oak, shakes, stucco, slab, primed synthetic siding & various other substrates and surfaces. Excellent resistance to rust on ferrous surfaces.
ULTRA BLOCK™ is ideal for use on Residential, Commercial, Industrial and most other Applications.

SURFACE PREPARATION:

PREVIOUSLY PAINTED SURFACES:
Sand all glossy surfaces before washing. Prepare the surface by pressure washing with at least 1,500 p.s.i. of pressure to remove previous coatings, dirt, oil, grease, chalk, and other foreign materials, especially mold, mildew and algae. Spray and mist the surface with a water and chlorine solution (approximately 1 quart chlorine to 5 gallons of water) and let stand for 15 minutes. On excessively soiled, chalky, algae contaminated, moldy or mildewed surfaces, a stronger concentration of chlorine and scrubbing will be required. Wash surfaces from bottom up including eaves, soffit and fascia. The complete surface to be coated must be cleaned, even if it looks clean, because invisible residues may cause adhesion failure. After cleaning, rinse the surface thoroughly and let dry 24 hours. Scraping, wire brushing and/or sanding may be necessary for complete removal of contaminants.
Note:
This product will resist mold, mildew and algae growth, but will not kill spores, which are nearly invisible and must be removed prior to the application.

UNPAINTED/UNCOATED/BARE SURFACES:

Wood:
Prime bare wood with ULTRA BLOCK™. Sand weathered or discolored wood down to solid wood. The surface must be clean and free of all dust before priming with ULTRA BLOCK™. Wood knots should be spot primed with ULTRA BLOCK™ prior to a full coat of ULTRA BLOCK™. Pressure treated wood must be aged at least 6 months before it can be primed with ULTRA BLOCK™.

Metal:
The surface must be clean and free of all grease, oil and foreign matter before priming with ULTRA BLOCK™. Prime nails, nail heads, penetrations, rusted, oxidized or corroded metal with ULTRA BLOCK™. If rust persists, a pigmented metal primer may be necessary.
Masonry: New masonry must be sealed with a pH sealer or aged 30 days and have a pH below 9.

APPLICATION PROCEDURE:
Mix before use. Do not thin. May be applied by brush, roller or spray. Some stains and softer woods with high sap content may require two coats. Some highly sensitive stains may require the application of a solvent-based stain sealer for best results. For exterior applications, stop painting at least two hours before you expect heavy dew, rain, or temperatures below 40℉ (7℃). For maximum stain resistance, allow six hours before top coating. Low temperature, high humidity or poor ventilation will increase these times.

Airless Sprayers:
Use at least a 1 gallon per minute piston type airless sprayer with a minimum tip size of .011.

Note:
This product might not hide stains completely by itself. Once a paint or coating is applied, the stain or blemish should be noticeably sealed. If stains persist, the application of a solvent-based stain sealer may be necessary.

CLEAN UP:
Clean up all spills, tools and overspray immediately while the coating is still wet with warm soapy water.