MonoBase Application Instructions

MonoBase is a water-based, acrylic, flexible, durable, & highly elastomeric waterproofing base, suitable for application over most low slope, metal, & other roofing substrates.

MonoBase is used in conjunction with MonoTop or HardTop to provide a single, watertight membrane.

  1. Clean & prepare the surface to receive waterproofing treatment by removing all loose & flaking particles, grease, & laitance with the use of a 3,000 PSI power wash & a stiff broom. Care should be taken not to inject water into the substrate during washing. In some cases, additional drying time may be required after the cleaning process.
  2. Brush apply MonoBase across the entire roof surface at a total rate of 25-40 sq. ft./gal, or 2.5 gal/sq., depending on the substrate.
  3. Embed suitable size fabric into the wet slurry, brushing out bubbles, creases, & fish mouths. Care should be given to ensure that adjacent runs of fabric overlap a minimum of 4”.
  4. Immediately apply a saturation coat of MonoBase by brush to the fabric at a coverage rate of 40sq ft/gal.
  5. Continue the MonoBase treatment up & over vertical surfaces, roof penetrations, & into roof drains, gutters, & scuppers.


CLEAN UP: Thoroughly clean & rinse application equipment with fresh water.

STORAGE: Store materials in a well-ventilated area between 45F-90F. Keep out of direct sunlight.

SHELF LIFE: 18-24 months from the date of manufacture if stored according to above guidelines.


Safety & Handling

For specific information regarding safe handling of MonoBase please refer to the SDS.




PREVENTION: Obtain special instructions before use. Do not handle until all safety precautions have been read and understood.

Wear protective gloves, clothing, eye protection, & face protection.

Wash hands & skin thoroughly after handling. Avoid release to the environment.

RESPONSE: If exposed or concerned, get medical attention/ advice. If in eyes, rinse cautiously with water for several minutes.

Remove contact lenses if present and easy to do. Continue rinsing. If eye irritation persists, get medical attention/advice. Collect spillage.

DISPOSAL: Dispose of contents & container in accordance with local, regional, national, international regulations.

STORAGE: Store locked up.


GHS HAZARD STATEMENTS: Suspected of causing cancer. May damage fertility or unborn child. Causes eye irritation. Harmful to aquatic life with long-lasting effects.

GHS CLASSIFICATION: Carcinogen (Cat. 2), Reproductive Toxin (Cat. 1), Eye Irritation (Cat 2B), Aquatic Acute Toxicity (Cat. 3), Aquatic Chronic Toxicity (Cat. 3).

GHS ASSESSMENT: Approx. <2% of this mixture consists of ingredient(s) of unknown acute toxicity. Approx. <3% of the mixture consists of ingredient(s) of unknown hazards to the environment.



EYES: In case of contact, immediately flush eyes with plenty of water for at least 15 mins. Seek medical attention if irritation develops.

SKIN: In case of contact, flush skin with plenty of water for at least 15 mins while removing contaminated clothing & shoes. Seek medical attention if irritation develops and/or persists. Wash contaminated clothing before reuse.

INGESTION: If swallowed & feel unwell, call a physician or poison control center. DO NOT induce vomiting unless directed to do so by a physician or poison control center. If victim is fully conscious, give a cupful of water. Never give anything by mouth to an unconscious person.

INHALATION: If respiratory or other symptoms of exposure develop, move victim away from source of exposure & into fresh air. If symptoms persist, seek immediate medical attention. If victim is not breathing, clear airway and immediately begin artificial respiration. If breathing difficulties develop, oxygen should be administered by qualified personnel. Seek immediate medical attention.

MonoBase Application Video