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Flexible Polyurethane Joint Sealant:  

Resiflex is a fast cure, flexible, high modulus, construction grade, polyurethane joint sealant in 600ml sausages.   


Resiflex FC 33 is used to seal and provide waterproofing to: Joins, gaps, corners (fillets), penetrations, cracks, bonding tiles and ridge tiles and bonding plastic and metal angles to concrete, timber and FC sheeting substrates.   


Suitable Surfaces   
Concrete, cement, terracotta and earthenware, anodised aluminium, most metals, timber, brick and block work. Generally adheres to most surfaces without priming but they must be sound. dry, clean and free of dust, contaminants and loose matter. If in doubt, prime surface with Primeseal.   


The information contained in this product data sheet is typical but does not constitute a full specification as conditions and specific requirements may vary from project to project. The instructions should be considered as a minimum requirement but the applicator or contractor must use their skill, knowledge and experience to carry out additional works as may be necessary to meet the requirements of the project. Specification for specific projects should be sought from the Company in writing.   


Not designed for long term direct exposure to sun light.   


Benefits and Advantages   

Fast cure
Single pack - in 600ml sausages.
Easy to use.
Tools off easily
Compatible with Wrimco waterproofing membranes.
Excellent adhesion.

Precautions in Use   

Avoid contact with skin. In the event of contact with eyes, clean immediately with water and obtain medical attention. Use in well ventilated areas. Keep away from flame and sources of ignition. Contains isocynates.  


Priming and Surface Preparation  

Good preparation is essential. Surfaces must be sound, stable, dry, clean and free of dust, loose, flaking, friable material and substances that may diminish adhesion.  


Remove either mechanically or by manual wire brushing or other means any loose material, contaminants and other adhesion reducing agents such as rust, dust, friable matter, wax, oils and grease.
New concrete should be allowed to cure for 4 weeks.
A preliminary test must be done on siliconised tiles. Users must determine compatibility with surfaces, adhesion and staining.


Apply sealant in continuous strip with enough pressure to properly fill and seal the joint, crack, corner or gap.

Corner fillets should extend at least 10mm along both the vertical and horizontal surfaces at a 45 degree angle and at least 5mm beyond the base rung of mortar.

Allow to at least skin before applying Multithane or Duram 195 over it. Resiflex FC 33 should be fully cured if applying water based membranes over it.

If used to bond tiles, metal or timber surfaces must be supported for up to 15 hours if weight exceeds 8kg per m2.

Clean up: Use white spirits while still wet. If cured then remove mechanically or manually by scraping.

Painting: The joint can be painted when cured with conventional acrylic or vinyl paints but preliminary tests should be done. Joint movement may result in the paint cracking.

Other Information:
Please refer to the data sheet on Leak-Seal Tape for the waterproofing of joints, cracks and gaps.

The stated average coverage rate may vary depending upon type, condition, porosity, texture of the surface and application technique.   


Approximate coverage (strip length) per 600ml sausage:  

Joint Depth
(in mm)  

Joint Width
(in mm)

Joint Width
(in mm)

Joint Width
(in mm)

Joint Width
(in mm)





















Current stocks are grey. However, the product is available in white, tile, or black if quantities are sufficient.   


Drying and Curing   

Drying and curing of the product is affected by type, dryness and porosity of the surface, temperature, humidity, ventilation, climate conditions and application technique and therefore drying and curing can only be given as a guide.  


Skin Formation: Approx. 45' at 23C, 50% RH.
Rate of Cure: > 3mm / 24hrs at 23C, 50% RH
Application Temperature: + 5C to 40C
Service Temperature: -20C to 80C 


Store in cool and dry area. Protect product from damage. Product will cure if exposed to air. Shelf life: Up to 12 months in unopened and undamaged containers. Packaging: 600ml sausages packed 20 to a carton.   


Clean Up   

Whilst wet, clean with white spirits. If cured, remove mechanically or manually by scraping. It may not be possible to remove all of the contents.  


Tiling, Topping or Top Coating  

Not applicable.   


Safety & Precautions   

Use for intended purpose only. Observe good industrial hygiene. The use of rubber gloves is recommended. Product is flammable. Keep all sources of ignition away. Use in well ventilated areas. If on skin, wash immediately with soap and water. If in eyes, immediately flush thoroughly with clean water and seek urgent medical attention. Product is very thick, so splashes is unlikely. Introduction to eyes most likely by contact with product via hands. Inhalation is unlikely, but remove person to fresh air and seek urgent medical attention.  


For full safety data refer to the products Material Safety Data Sheet. Observe precautions as per label.   


Tests and Technical Data
Application Temperature: +5C to 40C
Service Temperature: -20C to 80C.
Specific Gravity: 1.30


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