Sikaflex®-201 US
Long open time polyurethane sealant
Sikaflex®-201 US is a multi-purpose 1-component polyurethane sealant which cures on exposure to atmospheric moisture suitable for making permanent flexible and elastic seals. It is designed with a long open time for applications that require additional working time.
- Bonds well to a wide variety of substrates
- Can be sanded and painted
- Meets the requirements of AAMA 803.3 Type I and AAMA 808.3
- Listed under NSF/ANSI/CAN 61 ─ Drinking Water System Components (aluminum gray, capitol tan, black, and white)
- Listed under NSF ─ Proprietary Substances and Nonfood Compounds (aluminum gray, black, and white)
- Tested to ASTM E84 – Standard Test Method for Surface Burning Characteristics of Building Materials
- Tested to ASTM E90 – Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
PRODUCT BENEFITS
- Bonds well to a wide variety of substrates
- Can be sanded and painted
- Meets the requirements of AAMA 803.3 Type I and AAMA 808.3
- Listed under NSF/ANSI/CAN 61 ─ Drinking Water System Components (aluminum gray, capitol tan, black, and white)
- Listed under NSF ─ Proprietary Substances and Nonfood Compounds (aluminum gray, black, and white)
- Tested to ASTM E84 – Standard Test Method for Surface Burning Characteristics of Building Materials
- Tested to ASTM E90 – Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
Usage
Sikaflex®-201 US provides a longer working time and permanent elastic seal. It is suitable for sealing joints, seams and gaps in many applications including HVAC, metal buildings, tanks and grain bins, non-vehicular window perimeters and many other industrial applications. Suitable substrate materials are metals, metal primers and paint coatings (2-component systems), ceramic materials and plastics. Seek manufacturer’s advice and perform tests on original substrates before using Sikaflex®-201 US on materials prone to stress cracking. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.Packaging
| Cartridge | 300 ml |
| Unipack | 600 ml |
| Pail | 4.5 gal (US) |
| Drum | 50 gal (US) |
Product Details
| Chemical base | 1-component polyurethane | |
| Color (CQP001-1) | White, aluminum gray, tan, capitol tan, MB bronze, black | |
| Cure mechanism | Moisture-curing | |
| Density (uncured) | 1.5 kg/l (12.5 lb/gal) | |
| Non-sag properties | Good | |
| Application temperature | 5 ─ 40 °C (41 ─ 104 °F) | |
| Skin time (CQP019-1) | 4 hours A | |
| Curing speed (CQP049-1) | (see diagram 1) | |
| Shore A hardness (CQP023-1 / ISO 48-4) | 45 | |
| Tensile strength (ASTM D412) | 1.3 MPa (190 psi) | |
| Elongation at break (ASTM D412) | 550 % | |
| Service temperature (CQP513-1) | -40 ─ 90 °C (-40 ─ 194 °F) | |
| Shelf life | cartridge / unipack pail / drum | 12 months B 6 months B |
| CQP = Corporate Quality Procedure | A) 23 °C (73 °F) / 50 % r.h. | B) storage below 25 °C (77 °F) |
CURE MECHANISM
Sikaflex®-201 US cures by reaction with atmospheric moisture. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram 1).
Diagram 1: Curing speed for Sikaflex®-201 US
CHEMICAL RESISTANCE
Sikaflex®-201 US is generally resistant to fresh water, seawater, diluted acids and diluted caustic solutions; temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils; not resistant to organic acids, glycolic alcohol, concentrated mineral acids and caustic solutions or solvents.
Application
Surface Preparation
Surfaces must be clean, dry and free from grease, oil and dust.
Surface treatment depends on the specific nature of the substrates and is crucial for a long lasting bond. Suggestions for surface preparation may be found on the current edition of the appropriate Sika® Pre-Treatment Chart. Consider that these suggestions are based on experience and have in any case to be verified by tests on original substrates.
Application
Sikaflex®-201 US can be processed at temperatures (climate and product) between 5 °C and 40 °C (41 °F and 104 °F) but changes in reactivity and application properties have to be considered. The optimum temperature for substrate and process material is between 15 °C and 25 °C (41 °F and 77 °F).
Sikaflex®-201 US can be processed with manual, pneumatic or electric driven piston guns as well as pump equipment. For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.
Tooling and finishing
Tooling and finishing must be carried out within the skin time of the product. It is recommended using Sika® Slick. Other finishing agents must be tested for suitability and compatibility prior the use.
Removal
Uncured Sikaflex®-201 US may be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically.
Hands and exposed skin have to be washed immediately using a suitable industrial hand cleaner and water.
Do not use solvents on skin.
Overpainting
Sikaflex®-201 US can be painted after formation of a skin. If the paint requires a baking process, best performance is achieved by allowing the sealant to fully cure first. 1C-PUR and 2C-acrylic based paints are usually suitable. All paints have to be tested by carrying preliminary trials under manufacturing conditions.
The elasticity of paints is usually lower than that of sealants. This could lead to cracking of the paint in the joint area.