Description
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COCOON 501
Interior Waterproof Coating. Tough, Permanent Protective Skin.
COCOON 501 is a high-performance interior waterproof coating formulated for application on masonry, plywood, steel, and other common building surfaces. Once applied, it forms a tough, flexible, and permanent waterproof skin that conforms to a wide range of substrates while providing long-term protection against moisture, gases, and contaminants.
Engineered as a liquid polyvinyl chloride coating, COCOON 501 can be sprayed directly onto clean, dry surfaces, where it cures into a seamless protective membrane. It delivers strong adhesion and excellent low-temperature flexibility, making it suitable for demanding interior environments requiring hygiene, durability, and environmental control.
The cured film seals against moisture ingress, airborne particulates, corrosive agents, and microbial growth, while also functioning as an effective gas barrier in controlled environments. Its bridging capability allows it to maintain continuity across joints, penetrations, and irregular surfaces, ensuring complete enclosure protection.
Key Benefits
- Permanent Waterproof Barrier
Forms a tough, seamless interior membrane that resists moisture penetration - Gas & Contaminant Seal
Blocks gases, airborne particulates, and environmental pollutants - Chemical & Corrosion Resistance
Protects against acids, oils, fats, greases, and industrial contaminants - Hygienic Surface Protection
Resists bacteria, fungi, and microbial growth for clean environments - High Abrasion Resistance
Withstands wear, washing, and frequent cleaning - Low Temperature Flexibility
Maintains performance and flexibility in cold environments - Seals Complex Details
Bridges joints, penetrations, ducts, and irregular substrates - Controlled Environment Performance
Suitable for gas-tight applications and air control systems
Typical Applications
- Dust-free manufacturing and processing areas
- Shower rooms and wet interior spaces
- Brewery fermentation rooms and bottling plants
- Hospital scrub rooms and clean environments
- Natatoriums and aquatic facilities
- Controlled atmosphere storage facilities
- Hyperbaric suites and fumigation warehouses
- HVAC plenum chambers and duct sealing systems
Coverage
Approximately 1 gallon per 100 sq ft per coat × 4 coats
(Coverage may vary depending on substrate condition and surface profile.)
Packaging
5 Gallon
Color
White
Sealer Type
Polyvinyl Chloride Solution
Preparation and Application
Surface Preparation
All surfaces must be dry, free of dirt, loose debris, oils, grease, or any substance that could interfere with adhesion. Additionally, all surfaces should be modified in a manner to make them as smooth as possible by removing sharp projections and filling gaps and voids
Application
A minimum surface profile of ½mm should be maintained for maximum adhesion. After proper masking, prime the entire sur-face to be coated with Vinyl Bond B, directly from the can, by spray or roller and allow the primer to dry. Close all penetrations through the surface by using a webbing coat. Webbing solution is made by mixing 1 part webbing agent with 3 parts Cocoon 501 to produce a milky, white solution that will support the following coats. Mix ½ gallon of Cocoon Pigment into a 5 gallon can of Cocoon 501 and mix until the color is uniform. Spray apply the mixed Cocoon 501 in multiple overlapping passes until a 20 mil dry film thickness has been achieved. Properly applied, the coating should be free of voids and pinholes. Voids and pinholes must be re-sprayed to achieve a complete seal. Prior to the removal of any protection or equipment, a thorough inspection of the entire area should be completed and all damage or deficiencies must be repaired and re-sprayed. All termination joints should be sealed with a polyurethane sealant.
Recommended Thickness
3 to 5 mils Dry Film Thickness (DFT)
Drying Time
About 5 minutes per coat
Clean up
Equipment may be cleaned with Acetone
Storage
Store in a dry area and protect from direct sunlight and freezing. Protect from moisture and foreign materials. Keep container tightly sealed. Shelf life is 2 years from date of manufacture when stored in a factory sealed container between 50ºF (10ºC) and 90ºF (27ºC).
Disposal
Waste disposal must be in accordance with existing federal, state and local environmental control laws. Incineration is the preferred method of disposal.
Read the container label warning and Safety Data Sheet (SDS) for important health and safety information prior to the use of this product.
KEEP AWAY FROM CHILDREN AND PETS
For additional information, contact the Andek Technical Department
Technical Data
| VOC | 254 gms/liter | |
| Moisture Vapor Transmission | 0.06 perms | ASTM E-96 |
| Tensile Strength | 900 psi | ASTM D-412 |
| Elongation | 170% | ASTM D-412 |
| Flexibility at Low Temperature | 180 deg. bend @ -30°C | ASTM C-711 |
| Shore ‘A’ Hardness | 75 degrees | ASTM D-2240 |
| Weatherometer (240 hours) | 85 gloss | ASTM G-23 |
| Viscosity | 55 ku | ASTM D-446 |
| Total Solids | 30% (B.W.); 25% (B.V.) | ASTM D-1044 |
| Flashpoint |
+15°F | FTMS 141A (M4293) |
| Fire Resistance |
Self-extinguishing |