LRS FastCoat Pro PU Joint Sealer

LRS FastCoat Pro PU Joint Sealer is a single component, elastomer polyurethane roofing sealant for expansion and joints.

Best Uses

LRS FastCoat Pro PU Joint Sealer is ideal for use as a waterproofing sealant indoors, for outdoors for masonry, expansion joints and termination points. Also suitable for bringing uneven surfaces level.

• Universal joint sealing compound for building construction
• Expansion joints in heavy and light prefabrication and traditional masonry

LRS FastCoat Pro PU Joint Sealer adheres to aluminium, glass, masonry, wood, felt, asphalt, metal, single-ply etc.

Resistance

Provides good resistance to:

• Orthophosphoric Acid 84%
• Ammonia 22%
• 37% Formic Aldehyde Solutions
• Salt water
• Bleach
• Spirit
• White Spirit
• Hydrogen Peroxide 33 Vol
• Ethanol 20%
• Hydrochloric Acid 10%
• Gasoline
• Paraffin Oil
• Mineral Oil

Products medium resistance to:

• Trichlorethylene
• Acetone
• Ethylacetate
• Acetic Acid 25%
• Ethyl Hexanol
• Sulfuric Acid 5%

Products no resistance to:

• 10% Soda Solutions
• 50% Soda Solutions
• Lactic Acid 50%
• Nitric Acid 10%
• Octanol

Application

The surface must be clean, dry and free of dust, grease or residues. On concrete, wait first for it to cure out and stabilize (minimum 4 weeks). A preliminary test is necessary on siliconized tiles. It is up to the contractor to check the compatibility with the surface in terms of adherence, chemical compatibility and staining (make a pre-test if required).

Size correctly the joint according to the predictable movements and to the capacity of movement. The width of the joint must be between 6 and 40mm, including for vertical joints. For joints of 10mm and smaller, the depth of the joint must be equal to its width. For the widths of joints superior to 10mm respect a depth to width ratio of 2:1.

If necessary, apply in a thin layer a polyurethane-type primer. We recommend using a primer on mortars and similar materials with smooth surfaces. Contact our technical team for a suitable product for your circumstance.

After the primer is cured, press a flexible backing rod that will not adhere to the sealant. The bottom of backing rod should not show notches likely to cause bubbling. Protect the edges of the joint by adhesive tape for a better finish.

Apply the sealant in one layer for joints of small width, in three layers for joints of large width, the two first onto the edges of the joint and the third onto the bottom. Smooth with water free of additives. Press the sealant correctly against the edges and the bottom of the joint while avoiding the air bubbles inclusion. Remove the masking tape.

Clean excess material with White Spirit before it dries and cures. Excess dried sealant can be removed by gentle scraping.

Can be painted later, after full curing. Use water-based paint (acrylic or vinyl) but test first. Joint movement can in time crack the paint.

IMPORTANT NOTICE: From 24th August 2023, adequate training is required before industrial or professional use of this product. Training can be accessed at: https://www.safeusediisocyanates.eu