Sika’™s Sikaflex-201 is a  high quality, one-component flexible, polyurethane based, elastomentric sealant, generally used in log structures over 2 years old.  It has excellent adhesion to wooden logs and affords permanent flexibility. It  cures to a tough, durable, elastic consistency with excellent cut and tear  resistance. It exhibits high recovery making it ideal for sealing dynamically moving joints. Tack free time is 4 to 8 hours. Elongation is 700% at break and  120-psi lap shear. Application temperature range is 20F to I OOF. It can be painted over with water, oil or rubber based paints. It can be used to seal  either interior or exterior openings in log homes. It is designed for joints  with a maximum size of ½” deep by 1’wide when  movement does not exceed plus or minus 25% of the total width of joint (class A sealant). It meets Federal Spec. TT-S-00230C, Type II, Class A and is approved  by USDA, FDA and NSF.

Sika’™s Sikaflex 219LM formulation allows greater movement (plus or minus 50%) of joint width. It is generally used in new construction when shrinkage (loss of moisture) of logs or  settling caused by the weight of the structure creates dynamic  movement.

Color availability:  Tan

How to Use:

Substrate:  Clean, dry, free of oil, grease, and of sound quality. Thoroughly remove all loose particles or residues of color, splashes, etc. Clean surface with a strong jet of compressed air, sandblast, solvent.

Priming:  Pretest substrates for adhesion. Cleaners and/or primers may be required to achieve optimal adhesion.

Please refer to the Surface Preparation Guidelines for specific application information.

Application:  Recommended application temperatures: 40oF to 110oF. For cold weather application, store units at approximately 70oF; remove just prior to using. Make sure joint is frost-free. Cut tip to joint size. Puncture airtight seal. Install with hand or power operated gun. 

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• Do not apply on frozen surfaces, through standing water or on wet surfaces.

• Do not apply over silicones.

• Do not apply on surface where constant temperatures shall exceed 170oF.

• Avoid exposure to high levels of chlorine. (Maximum level is 5 ppm).

• Allow 1 week cure time (75oF/50% R.H.) when using Sikaflex-219 LM in total water immersion situations.

• Do not use in joints deeper than 1/2 inch; minimum depth is 1/4 inch.

• Will not adhere to polyethylene, polypropylene and teflon.

• Avoid contact with alcohol and alcohol containing solvents during cure.

Chemical Resistance:

• For best results, use opened cartridges the same day.

• When applying sealant, avoid air entrapment.

• Since system is moisture-cured, permit sufficient exposure to air.

CAUTION:  Combustible:

This product contains xylene. Keep away from open flame and high heat. Use only with adequate ventilation. Avoid prolonged breathing of vapors.

Avoid skin and eye contact. Wash hands thoroughly after use. Use NIOSH approved organic vapor respirator, safety goggles, and chemical-resistant gloves recommended.

In case of skin contact, wash thoroughly with soap and water. For eyes, flush immediately with plenty of water for at least 15 minutes, and call a physician.

Wash clothing before re-use. Discard contaminated shoes.

Uncured Sikaflex may be removed from tools with solvent. Cured sealant is only removable mechanically. In case of spillage, collect, absorb, and dispose of in accordance with applicable local, state, and federal regulations. Keep containers tightly closed and in upright position to prevent spillage and leakage.