DT Repair Mortar
DuraTite Repair Mortar is a fast setting, one component, ready to-use repair mortar for vertical and overhead applications using specialty cement blends.
DuraTite Repair Mortar consists of Portland cement, specially treated quartz sand and a compound of active chemicals. The active chemicals react with moisture and the by-products of cement hydration to cause a catalytic reaction, which generates an insoluble integral crystalline complex. These crystalline complexes grow in the presence of water and block the capillaries of the concrete and minor shrinkage cracks, thus waterproofing the concrete. Chemical activation begins when the powder is mixed with water and may take several days to completely block the capillaries, depending on ambient temperature and environmental conditions.
Special Considerations
DO NOT apply DuraTite Repair Mortar at temperatures below 40ºF (4ºC), to a frozen substrate or if temperatures will drop below freezing during the curing period (approximately 24 hours). This product is not recommended for use in expansion joints or other joints designed for movement. DuraTite Repair Grout can be applied in 1/2″ (13 mm) layers not exceeding 2.5“ (6.4 cm) to prevent shrinkage cracks in the mortar.
Applications
Applied in conjunction with DuraTite Plug and DuraTite Foundation for: Installation of seal strips, reglets and coves at joints to assure water tightness Patching of tie holes and faulty construction joints Patching and filling of routed out cracks Repairing of spalled and honeycombed areas
Product Properties
• Can be applied to the positive or negative water pressure sides of a structure
• Resists strong hydrostatic pressure
• Easy to use – needs only to be mixed with water prior to application
• Allows the concrete to “breathe”
• Can be skim coated or feather edged
• Can be applied to moist concrete
• Fast setting Inorganic – contains no polymers
• Non-flammable
• Resists abrasion and mechanical wear Freeze/thaw resistant
• Zero VOC
Packaging
DuraTite Repair Mortaris available in 55lbs. (25kg) pails
Directions for use
Surface preparation:
All surfaces to be patched, repaired or sealed with DuraTite Repair Mortar must be clean and sound. Cracks should be routed out to a U-shaped configuration, approximately 3/4” (19 mm) wide and a minimum of 3/4” (19 mm) deep. Tie holes should be roughened prior to filling. Spalled and honeycombed areas must be thoroughly cleaned and chiseled back to sound concrete prior to repair. Remove all dirt, cement laitance, form release agents, curing compounds, paints, coatings, etc. by means of wet or dry sandblasting, high pressure water jet or other suitable mechanical means. Surfaces must be well moistened to a dull dampness at the time of application. The concrete should be damp with no wet sheen on the surface.
Mixing:
Routed cracks, coves and non-moving joints: Add water to DuraTite Repair Mortar until a medium stiff, trowelable consistency is reached. The texture of the mix should be pliable enough to be trowelled into the cracks with some pressure, but not so pliable that it would run out or sag out of the crack. Approximate mixing ratio (by volume) is 5.5 parts powder to 1 part water. Alternatively, 158 oz (4.5 L) of water to 55 Lbs. (25Kg) of DuraTite Repair Mortar powder.
Tie holes and pointing applications: Add only a small amount of water. Mixed consistency should be that of “dry earth,” holding a shape when squeezed in your hand but easily crumbled when pressed between fingers. Mix only as much material as can be used within 20 minutes.
Application:
Cracks/seal strips (reglets & coves): After proper surface preparation and routing to appropriate configuration, fill cavity flush to surface with DuraTite Repair Mortar in mortar consistency. Spalled and honeycombed areas: Prepare surface and chisel back to sound concrete.
Tie holes and pointing applications: Prepare surface and chisel back to sound concrete. DuraTite Repair Mortar should be tightly rodded into tie holes or packed tightly using a hammer and block of wood.
Curing:
Provide protection against extreme weather conditions, such as heavy rain or freezing conditions, during the setting period. Curing is not normally required except during hot, low humidity weather. In these conditions, a light mist of water approximately 24 hours after the repair is completed will help to ensure a controlled cure. In extreme dry heat, water misting may be required more frequently.
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