Secondary Containment Procedures for Repair & Coating of Concrete Areas
- Repair of cracks in uncoated concrete
- Use the crack repair kit. Each kit contains enough material to coat an area 30 ft. Long
and 6" wide.
- Repair of construction or expansion joints.
- Each 2 gallon unit of Thiocaulk H-705 has enough material for a joint 1/2" x 1/4" x 240
- Coving the wall and/or floor area.
- Use Wall-Nu Trowelable and mix Parts A and B equally by volume. Apply the mixed
material with a 1" putty knife. Apply 3/4" on the wall and 3/4" on the floor areas.
Allow the material to cure before applying the Epo-Line 161 material, if the floor is to
be coated. This usually can be topcoated the following day if the temperature has been
maintained at 75 degrees Fahrenheit for 24 hours.
- Coating the floor and/or the wall area with Epo-Line 161.
- Surface Preparation. (Two options are available for new and old concrete.)
Option 1- Floor/wall: Sandblast with a brush blast profile. Note: When coating a poured
concrete wall area, it will be necessary to brush blast the area to be coated, to expose the bug
holes. Then the wall area should be scrape troweled with Wall-Nu Trowelable to fill those bug
Option 2 - Acid etch and neutralize with aqua ammonia. Use the Clean & Etch product on old
stained concrete and neutralize. Then wash the area of the neutralized material with a hose and
clean water and allow to dry overnight. Use a fan to help get rid of moisture where poor air
- Repairing cracks
- Large cracks should be repaired as listed above.
- Small hairline cracks may be repaired using a 9" roller to aply a coat of Epo-Line
161, then embedding a 6" wide strip of fiberglass cloth for the length of the
crack. A second coat of Epo-Line 161 should be applied within 24 hours.
- Coving the wall and floor area
- Use Wall-Nu Trowelable and mix Parts A and B equally by volume. Apply the
mixed material with a 1" putty knife. Apply 3/4" on the wall and 3/4" on the
floor areas. Allow the material to cure before applying the Epo-Line 161
material, if the floor is to be coated. This usually can be topcoated the following
day if the temperature has been maintained at 75 degrees Fahrenheit for 24
- Applying the first coat of Epo-Line 161. A 2 gallon unit covers 375 square feet at 8
mils dry per coat.
- Mix the 2 gallon unit in a 5 gallon bucket, then pour that mixture into a second 5
gallon bucket, making sure to crape the sides and bottom of the first bucket to
remove all unmixed material. Mix the contents in the second bucket for a period of 3 minutes minimum. This will ensure a complete mix of the material
and will not leave soft spots in the completed floor or wall coating.
- Apply the first coat of Epo-Line 161 at an application rate of 375 sq. ft. per
gallon of mixture. Note: If a non-skid material is to be used, it should be
broadcast on the top of the first coat. Sand may be used in areas of foot traffic
and Aluminum Oxide should be used in areas of heavy equipment traffic.
Aluminum Oxide should be applied at a rate not to exceed 100 pounds per 400
- Allow to dry overnight at 75 degrees Fahrenheit. Forced hot air should be used
to help maintain as high a temperature as possible. Material should not be
applied to areas with temperatures below 50 degrees Fahrenheit. Temperatures
below 75 degrees Fahrenheit will require longer cure time between coats and
after the final coat.
- Sweep off excess sand or aluminum oxide, if used.
- Apply the second coat of Epo-Line 161 at an application rate of 188 sq. ft. per
gallon. Follow the mixing instructions as listed above.
- Allow to cure for 5 to 7 days at 75 degrees Fahrenheit before using the area.
Note: A nylon loop roller is the best roller for the application of Epo-Line 161.
Click here to return to EpoSeal Table of Contents