O'Brill Company

Construction Specialty Suppliers

6626 N. Milwaukee Ave.

Niles, IL 60714

773-775-1122 or 847-647-0005

FAX 847-647-7819

Since 1967

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NO.388- PD

SEALTIGHT® MEADOW-PATCH™ 20

FAST SETTING, LOW SLUMP, CONCRETE REPAIR MORTAR

Description
SEALTIGHT MEADOW-PATCH 20 is a one component, cementitious, very fast setting restoration / repair mortar designed for vertical, overhead and horizontal applications. This very rapid setting, low slump repair mortar may be trowelled, shaped, molded, and shaved for 8-12 minutes before taking an initial set. MEADOW-PATCH 20 is an excellent patching solution for difficult vertical/overhead applications without using expensive and intricate forming techniques.

USES
SEALTIGHT MEADOW-PATCH 20 is easy to mix and apply. This very fast setting, low slump mortar is designed to minimize downtime. Because of its versatility MEADOW-PATCH 20 can be used vertically, horizontally, or overhead. Whether the installation is interior or exterior; MEADOW-PATCH 20 is an excellent choice for fast repairs above grade, below grade, or on grade. Because of its non-sag consistency and extremely fast setting times, MEADOW-PATCH 20 is well suited for underwater concrete repair. Typical applications include restoring dams, piers, reservoirs or sea walls. This long lasting mortar provides quick repairs to columns, precast panels, tunnels, bridges, concrete pipes, tie-rod holes, etc.

TECHNICAL DATA

Set times per ASTM C191 Compressive strength per ASTM C 109

Initial 8-12 minutes @ 3days 3,500 PSI (24.1 Mpa)

Final 15-20 minutes @28 days 6,000 PSI (41.4 Mpa)

FEATURES AND BENEFITS

	Low slump design for easy molding and shaping / no forms needed
	May be feathered edged / tenacious bond
	May be used vertically, horizontally, or overhead / highly versatile
	Excellent freeze/thaw characteristics / long term repair stability
	Extremely fast setting / increases turn around time

COMPLIMENTARY REPAIR/PATCHING PRODUCTS
FUTURA 15 & 30: rapid-setting repair mortar
MEADOW-PATCH T-1 & T-2: polymer modified thin repair mortars
REZI-WELD EPOXIES: full line of repair epoxies
MEADOWS GROUTS: 588, CG-86, PAC-IT
MEADOWS CURING &CURE/SEAL PRODUCTS: complete family of V.O.C. and water-base liquids
MEADOW-PLUG: very fast setting, hydraulic repair mortar

COVERAGE
MEADOW-PATCH 20 yield per 50 lb. bag is 0.45 ft. ³ (0.013m³)

SURFACE PREPARATION
Mechanically abrade existing substrate to remove all unsound concrete, but do not use excessive force which may cause micro- fracturing. Prepare surface in accordance with ICRI Technical Guide No. 03730. Substrate must be structurally sound and free of grease, oil, dirt or any other contaminants that can adversely affect the bond. Prepared surface must be dust free and have sufficient profile to ensure adequate mechanical lock. Substrate must be saturated, surface dry (SSD) and free of standing water.

MIXING
MEADOW-PATCH 20 requires approximately 4 quarts (3.78/L) of potable water per 50lb. (22.7kg.) bag. Mix material in manageable quantities to obtain a stiff, lump-free consistency within 60 seconds. Do not mix more material than can be placed and finished within 8-12 minutes at 77° F (25° C). Do not over mix or re-temper.

PLACEMENT
The properly prepared SSD repair area should be brushed with a slurry coat just before placing. Do not allow slurry coat to dry; immediately work MEADOW-PATCH 20 into the patch, compacting the material well against the substrate. Overfill, if desired to allow for shaping, molding, or shaving. For deeper repair areas do not exceed 2" per lift. As ambient, substrate & mix water temperature increases set time decreases, and as temperature decreases set time will increase.

CURING
MEADOW- PATCH 5 must be cured in accordance with ACI 308 utilizing a suitable curing compound such as SEALTIGHT 1100 Series or SEALTIGHT 1200 Series. Protect from rapid early water loss.

SHELF LIFE
1-year, when left in original, unopened packaging and stored indoors.

PACKAGING
50 LB Bag; Color: Gray

LIMITATIONS
Do not apply below 35° or above 90° (cracking may result). Never re-temper and avoid overworking the material.

SAFETY AND TOXICITY
Avoid direct contact with this product, as it may cause skin and eye irritation. Utilize gloves and goggles to minimize direct contact. Avoid inhalation of dust. Inhalation may cause respiratory irritation and/ or lung disease (silicosis). This product contains silicon dioxide, which is classified by the IARC and NTP as probably carcinogenic to humans (IARC Group 2A). The use of NIOSH approved respiratory protection is recommended in dusty environments. Refer to Product Material Safety Data Sheet for complete Health and Safety Information.

Keep product out of reach of children.

This material last updated February, 2001.

LIMITED WARRANTY
W.R.MEADOWS,INC. warrants that at the time and place we make shipment, our material will be of good quality and will conform with our published specifications in force on the date of acceptance of the order. Read complete warranty. Copy furnished upon request.

Disclaimer
The information contained herein is included for illustrative purposes only, and to the best of our knowledge, is accurate and reliable. W.R.MEADOWS,INC. cannot however under any circumstances make any guarantee of results or assume any obligation or liability in connection with the use of this information. As W.R.MEADOWS, INC. has no control over the use to which others may put its product, it is recommended that the products be tested to determine if suitable for specific application and/or our information is valid in a particular circumstance. Responsibility remains with the architect or engineer, contractor and owner for the design, application and proper installation of each product. Specifier and user shall determine the suitability of
products for specific application and assume all responsibilities in connection therewith.