BestSeal 800Flex

• Thermal expansion joints, ceiling expansion joints.

• Cracks, holes through floors and walls.

• Industrial concrete floors, indoor and outdoor parking lots.

• Runway areas, terraces and runways.

• One-component, pre-mixed, easy to apply.
  Resistant to harsh conditions, suitable for both indoor and outdoor use.

• No sagging, no drooping, no air bubbles.
  Excellent adhesion to many materials, especially to concrete.
  High elasticity with movement capability up to 25%.

SURFACE PREPARATION:

• The substrate must be dry and free from dust, contaminants, grease, cement laitance, and old paint layers with poor adhesion that may affect the sealant bonding performance.

• For weak substrates, highly deformable surfaces, or substrates with high residual moisture content: apply BestPrimer AC409 primer.

Note: The primer is intended to improve the service life of the sealed joint. The primer does not replace proper surface cleaning procedures or improve the substrate strength.

APPLICATION PROCEDURE:

Application:

• Install backer rod according to the technical requirements of the joint and apply primer if necessary. Load BestSeal 800Flex into a suitable caulking gun and begin applying the sealant into the joint so that the sealant fully contacts both sides of the joint walls. Completely fill the joint and avoid air entrapment during application.

Note:

• It can be overcoated with conventional façade coating systems. However, preliminary testing should be carried out to ensure compatibility.

• Color may change due to exposure to chemicals, high temperatures, or UV radiation; however, the product performance will not be affected.

• Do not use BestSeal 800Flex on glass surfaces, bitumen, natural rubber, EPDM rubber, or areas exposed to oil leakage, plasticizers, or solvents capable of dissolving the product.

• Do not use BestSeal 800Flex for swimming pool sealing. It is not suitable for areas subjected to high water pressure or prolonged water immersion. Best performance is achieved in well-ventilated areas.

• Do not allow BestSeal 800Flex to come into contact with isocyanate compounds, solvent-based cleaners, release agents, or solvents.

CLEANING:

• Use BestThinner SC01 to clean tools immediately after use and before the material begins to cure. Once cured, use appropriate mechanical methods for cleaning tools.

SAFETY INSTRUCTIONS:

• BestSeal 800Flex may cause allergic reactions on sensitive skin after prolonged contact. Gloves, masks, and safety goggles should be worn during application.

• In case of contact with eyes, nose, mouth… rinse immediately several times with clean water before going to the nearest medical facility for timely and proper treatment.

• Dispose of the product in accordance with local environmental protection and waste management regulations.