- Model No. 25/25LT - Epoxy Novolak Mortar/Setting Bed



Sauereisen Epoxy Novolak Mortar/Setting Bed is a three-component material used for bonding chemical-resistant masonry units. No. 25 is available in 3 versions. The standard grade is combined with brick or tile to protect concrete and steel substrates from attack by corrosive chemicals and physical abuse. The cold curing version, No. 25 LT, is specified for similar applications and accommodates installation temperatures as low as 35oF. Because of its fast setting nature, No. 25 LT is ideal for quick turnaround projects in refrigerated areas.

The water wipable version No. 25 WW is especially designed for tile setters when the ability to clean the tile with water is a benefit. See separate product data sheet for more detailed information.

Nos. 25 and 25 LT are used to construct floors, sumps, trenches, tanks and bleach towers in chemical processing, food & beverage plants; dairies; laboratories; textile, steel and pulp & paper mills. These Sauereisen mortar/setting beds have excellent resistance to strong oxidizing environments, sulfuric acid and some solvents up to 180oF.

All formulations of the NovolaK Epoxy Mortar/Setting Bed provide a strong bond to concrete, brick, tile and other substrates. Used with or without an underlying membrane, these products are an important element of an impermeable system of protection.

  • Resists sulfuric acid and strong xidizing environments.
  • Withstands temperatures to 180oF.
  • Authorized by USDA for use in feder ally inspected meat and poultry plants

Temperature of Working Area
For optimum application conditions, maintain a temperature of 60o - 85oF on air, substrate and No. 25 Powder, Liquid, Hardener, and masonry units during mixing, application, and cure. Maintain materials and substrate between 65oF and 80oF for 48 hours prior to beginning work.

At temperatures below 65oF, the viscosity increases and application becomes more difficult. No. 25 can be applied at temperatures as low as 50oF; however cure time will lengthen. Above 80oF, working time of the material decreases. In higher temperatures it is recommended that the Liquid be cooled by placing the pail in a large container filled with water and ice or storing in a cool area.

Cold Room Applications
For best results, maintain temperatures of 35o - 70oF on air, substrate and No. 25 LT material. Avoid storage or applications below 35oF to ensure proper curing. Above 70oF, working time rapidly decreases.

Surface Preparation
Surfaces must be free of oil, grease, water, and other contaminants that may inhibit bond. This can be achieved by chemical cleaning.

Concrete - Refer to SSPC-SP13/NACE 6 'Surface Preparation of Concrete' for detailed guidelines.

New Concrete - All structures must have the necessary strength to withstand imposed loads during normal use and operation. Surface must be floated free of ridges or depressions and all voids filled with Sauereisen Underlayment No. F-120 or No. 209 Filler Compound. The choice of underlayment will depend on the severity of the voids to be filled. Surfaces should be sloped a maximum 1/4 inch per foot for drainage.

Abrasive blast or high-pressure water blast concrete to remove laitance and obtain uniform surface texture exposing fine aggregate resembling coarse sandpaper. Acid etching is only recommended for areas where no alternative means of preparation are viable.

Old Concrete - Concrete must be dry and firm and possess the necessary strength to withstand imposed loads during normal use and operation. Ideal surface preparation requires mechanical methods to remove laitance, old paints and previously applied protective coatings.

All structural cracks should be repaired. All slopes should be reestablished with Sauereisen Underlayment No. F-120.

All prepared surfaces must be allowed to dry prior to monolithic application. Regardless of preparation method used, all surfaces must be vacuumed to remove any loose deposits or contamination.

Packaging consists of premeasured unitized containers of Hardener Part A, Liquid Part B, and Powder Part C. Remix Part A and B before combining.

Pour Liquid Part B into a clean mixing container. Add Hardener Part A to Liquid Part B. Using a slow speed 1/2 inch drill motor affixed with a 'Jiffy' type blade, mix thoroughly for two minutes. Slowly add 2/3 of Powder Part C and mix until all material is wetted out. Then add remainder of Powder and continue mixing until uniform in consistency. Material which has begun to set cannot be retempered and must be discarded.

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