MASCO Catalog: Construction Liquid and Powder

21 MASONS SUPPLY COMPANY Oregon (800) 537-3407 ♦ Washington (800) 537-6216 ♦ www.MASCO.net Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Ridgefield | Seattle | Tacoma | Woodinville Stir Part A & Part B separately before mixing together, then mix A & B together for 3 minutes using a Jiffy mixer, or equal, powered by a low speed electric drill. Apply the liquid bonding agent with a brush, paint roller, squeegee, conventional spray or airless spray. The minimum bond line thickness is 15 mils. When bonding fresh concrete to existing concrete, the new concrete to be bonded should be a relatively dry mix with a maximum slump of 3 in. Smooth surfaces - 100 ft²/gal. Rough surfaces - 50 to 75 ft²/gal. Apply the neat paste with a trowel in sufficient quantities to fill all gaps between the mated surfaces. The bond line thickness should be between 1/32 in. and 1/8 in. Deep surface irregularities can be faired with a 1 to 1 sand:epoxy mix, followed by neat application of adhesive within 24 hours. Smooth surfaces - 12 ft²/gal. Rough surfaces - 6 ft²/gal. Mix 1 part mixed binder with 3 to 4 parts kiln dried clean graded sands to desired consistency. Ratio can vary with temperatures. Prime surface to be repaired with neat binder then immediately apply epoxy mortar. Consolidate and finish with steel trowel. 3 to 1 sand:binder yields 2.8 gals./17.5 ft² @ 1/4" 4 to 1 sand:binder yields 3.4 gals./21.5 ft² @ 1/4" Smooth surfaces - 100 ft²/gal. Rough surfaces - 50 to 75 ft²/gal. Proper surface preparation is a key to the successful use of epoxy adhesives. Careful planning and execution of the cleaning and preparation procedures will lead to maximum efficiency in the application phase and greatest durability in use. The following tests can be used to evaluate the condition of the substrate and the effectiveness of the surface preparation procedures. The direct tensile strength of the surface may be determined by a pipe cap pull-off test or a commercially available adhesion tester. Pull-off strength should be a minimum of 200 psi. The presence of grease, wax, oil, curing compounds, or other sealers may be detected by dropping a small amount of diluted muriatic acid onto the surface. No reaction indicates that contaminants are present. If oil has penetrated into a concrete surface, it may be detected by raising the temperature of a small area to about 150°F (66°C) with a heat lamp. Presence of the contaminant is indicated if oil appears or the area becomes "greasy" to the touch. Remove grease, wax and oil contaminants by scrubbing with Envirosol (page 112) an industrial grade cleaner and follow with mechanical cleaning. Remove weak or deteriorated concrete to sound concrete by bush hammering, shot or grit blasting, scarifying, waterblasting or other suitable mechanical means. Remove dirt, dust, laitance and curing compounds by shot or grit blasting, water blasting or scarifying. Acid etching with 15% hydrochloric acid should be used only if there is no practical alternative. Etching often produces a fine dust which may act as a bondbreaker. When employed, etching must be followed by scrubbing and flushing with large amounts of clean water to remove residual chemicals. Check for removal of acid with moist pH paper. Reading should be greater than 10. Follow mechanical cleaning with vacuum cleaning. Remove dirt, grease and oil with Envirosol (page 112) or suitable industrial grade cleaning and degreasing compounds. Remove rust and mil scale by grit blasting. Blast steel to white metal. Follow grit blasting with vacuuming or oil-free, dry air blast and solvent cleaning. Strength Contaminants Concrete Surfaces Steel Surfaces Liquid Adhesive Coverage Rates Paste Adhesive Coverage Rates (1/8" thick) Binder Adhesive Mortar Coverage Rates (gallons) Primer Coverage Rates SURFACE PREP FOR ADHESIVES GUIDE Adhesive Anchoring / Gel Epoxies