A vertical crack, weeping snap tie holes, and the floor joint repaired with Hydro-Epoxy Mortar.(3 parts fine sand, 1 part Portland cement, 1 part mixed Hydro-Seal 75. We used less than a gallon of Hydro-Seal 75 to repair all the cracks in this basement.

Hydro-Epoxy Mortar System

With the HYDRO-EPOXY MORTAR SYSTEM deteriorated concrete surfaces can be patched and repaired. The result is a waterproof, chemically resistant topping that will level and beautify even the worst concrete substrates. This epoxy modified mortar consists of cement, sand and Hydro-Seal 75 waterproofing. In areas where pitted concrete has to be level to accept NORTHERN SEAMLESS FLOORING & other types of flooring, HYDRO-EPOXY MORTAR can be applied as thin as required. Remember that most Seamless Flooring failures are caused by inferior primers, excessive moisture, and lack of preparation. With HYDRO-EPOXY MORTAR the worst deteriorated substrate areas will be repaired and leveled with a waterproof, chemically resistant, water-base epoxy mortar. Call Northern at 1 800 346 5543 for chemical resistance information and detailed physical properties.

I. INTRODUCTION By adding cement and dry sand to blended Hydro-Seal 75 components, a bonding mortar is created. This makes an excellent crack filler, leveling and tuck pointing material for masonry joints. Hydro-Seal 75 possesses tenacious bonding qualities as thin as required. Hydro-Seal 75 is a solvent free, low modulus epoxy mortar binder designed for mixing with suitable aggregate to provide a waterproof and wear resistant slab topping for applications over Portland cement concrete floor slabs.

II. DESCRIPTION Hydro-Seal 75 Epoxy Mortar System consists of:

A. Hydro-Seal 75
B. CEMENT: No. 1 Portland (gray or white)

C. SAND: No. 30 or No. 70 Sieve Dry Silica: Aggregate washed kiln-dried graded and bagged silica sand containing a minimum of 98% silicon dioxide by weight aggregate shall be skip graded within the following limits

Sieve Size	Percent by weight passing
#4	100
#8	70 to 100
#16	33 to 75
#30	50 to 30
#50	5 to 20
#100	0 to 5
#200	0 to 3

III. TYPICAL USES
- A. For substrate repair
  - 1. Leveling
  - 2. Resurfacing
  - 3. Patching masonry
- B. For forming masonry
- C. As a coving system.

IV. PHYSICAL ANALYSIS AND TECHNICAL

A. Properties of cured binder when cured 7 days at 77° F and tested at 77° F.

Tensile Strength	ASTM D-638	2000 PSI
Tensile Elongation	ASTM D-638	25 %
Compressive Yield Strength	ASTM 695	2000PSI

B. Properties of Cured Mortar:3.1.1 by volume mix when cured 7 days at 77 degrees F and tested at 77 degrees F.

Tensile Strength ASTM C-190 1300 PSI

Compressive Strength ASTM C-190 8000 PSI

C. CHEMICAL RESISTANCE TEST:HYDRO-SEAL 75 resurfacing mortar will resist occasional splashing and spillage of practically most chemicals without adverse effect, in most instances:

CHEMICAL	EFFECT
Detergent	None
Acetic Acid 3%	Discolored
Citric Acid 3%	None
Kerosene	None
Ammonium Hydroxide30%	None
Calcium Chloride 10%	None
Lactic Acid 3%	None
Mineral Spirits	None
Potassium Hydroxide 10%	None
Sodium Chloride 20% (Brine Solution)	None
Motor Oil Sol. 30 grade	None
Sugar Solution 30%	None
Steam (30 hrs)	None
Urine	None
Sodium Hydroxide 5%	None
Isopropyl Alcohol 100%	None
Textile Spirits 100%	None
Toluene 100%	Discolored

V. APPLICATION
- A. Tools: Straight edge trowel, mortar mixer or wheel barrel
- B. Procedure:
  - 1. Prepare Substrate:
    - a) Conditions of surfaces shall be dry and free of dirt, paint, grease, oil, rust and other contaminants.
    - b) Surface shall be inspected and approved before the work has begun.
    - c) New concrete shall have been properly cured and seasoned.
    - d) Concrete surfaces shall be roughed by wire brushing, sand blasting, chipping, or etching.
    - e) All shrinkage shall have occurred.
    - f) Defects shall be corrected. Open cracks by undercutting or squaring off, rather than "V" cutting.
  - 2. Mixing:
    - a) Ratio: 3 parts #30 silica sand, 1 part Portland Cement, 1 part Mixed Hydro-Seal 75 liquid binder. For Thickness over 1/8": Mixing Ratio by volume
    - b) Mix Hydro-Seal 75
      - (1) measure epoxy parts carefully. Mix no more material than can be used within 30-45 minutes. Thoroughly mix each component individually before combining the two. Combine 1.1 ratio of component A and component B in a clean pail with a jiffy-mixer for a minimum of 5 minutes.
    - c) Pour mixed epoxy binder into mortar mixer and add calibrated quantities of the different aggregate sizes.
      - (1) Add aggregates in order of size starting with the coarsest. Add dry Portland cement is last.
    - d) Mix ingredients thoroughly until streak free. Mix an additional 3 minutes after adding all the aggregate and cement mixture. Mix until a desired consistency is reached so that you may use a trowel.
      Note: Batching: mix only the amount of material that can be used in 25-45 minutes at 70 degrees F.
  - 3. Apply to necessary areas with straight edge trowel
    - a) Patch all cracks and voids, and cove all corners and joints.
      - (1) Coving should extend at least two inches out and up from floor joints.
      - (2) Areas around form-ties in poured walls should be opened and patched.
      - (3) Allow patching to dry for two hours at 75° F or until dry to the touch.
- C. For Thin hairline cracks
  - 1. For a thickness Under 1/16" a mixture of Hydro-Seal 75( mixed) and Portland cement can be used without sand to feather edge hairline cracks and bridge small voids. The amount of cement added to the mixed Hydro-Seal 75 is determined by the thickness of the crack.
VI. CAUTION
- A. When skin contact occurs, wash immediately with soap and water
- B. Do not ingest.

Tensile Strength	ASTM C-190	1300 PSI
Compressive Strength	ASTM C-190	8000 PSI