Soudal Polyurethane sealant- Soudaflex FC
Construction joint PU sealant Soudaflex FC is a flagship product from Mccoy Soudal available with Anagha Engineers,Navi Mumbai. It is a one-component polyurethane sealant with a high modulus, high gap filling, high elongation, shore A hardness- 40. This is the best polyurethane sealant, Soudaflex FC construction, used as expansion joint sealant, concrete joint sealant, elastomeric joint sealant, movement joint sealant, preformed joint sealant, control joint sealant, concrete gap sealant.
Characteristics Of Soudal Polyurethane sealant
- Firstly, easy to apply and it offers permanent elasticity after curing.
- It offers excellent resistance to UV radiation and most chemically deteriorating agents.
- Furthermore, good adhesion properties and is especially developed for applications on concrete surfaces.
- Lastly, conforms to LEED standards.
Uses of polyurethane sealant, Soudaflex Construction FC.
This particular construction joint PU sealant was specially formulated in the McCoy Soudal labs for the construction industry. Its properties particularly offers superb adhesion to concrete surfaces and thus, is an integral tool in the building industry. Typical uses includes concrete joint sealing, control joint sealing, rubber joint sealing, expansion joint sealing, concrete gap sealing etc. However, it also finds application where structural bonding is required in vibrating constructions.
Technical Data of Construction joint PU sealant, Soudaflex FC
How To Use polyurethane sealant?
- Firstly, Use a caulking gun for application. highly recommended that a preliminary adhesion test conducted to make sure that it matches your requirement.
- Follow standard industrial hygiene applications.
- Apply this product under standard room temperature conditions.
- Lastly, make sure to clean the caulking gun with spirit immediately after application.
The five key steps for a successful sealant installation can be summarized as: clean, prime (if necessary), pack with joint backing material, gun the sealant, and tool the surface of the sealant. Specific instructions for each of these installation steps are provided in subsequent sections within this document below.
Two-cloth cleaning method:
The two-cloth cleaning method is completed by first wiping the substrate with a clean, white, lint-free cloth that is dampened with an approved cleaning solvent. The cleaning cloth should never be introduced or inserted directly into the solvent vessel or its contents to prevent contamination. Immediately follow the solvent-wipe, before the cleaning solvent has flashed off the substrate surface, wipe of a second cloth that is dry, clean, white, and lint-free to remove loosened dirt or oil. The surface must be dry, solvent must be flashed off, and contaminate free at this point prior to sealant application. It is recommended to clean nonporous substrates using this cleaning method immediately before applying a urethane sealant, and the substrate must be cleaned again if two or more hours have elapsed between the time that the substrate
was cleaned, and the sealant is applied.
Taping of surfaces surrounding the joint
Applying masking tape at the perimeter of a sealant joint is optional and is generally to support aesthetically favourable appearances of the sealant joint and to promote easier clean-up procedures. The masking tape must be removed immediately after the sealant’s surface is tooled and before the sealant begins to develop a skinned surface.
Concrete and masonry surfaces must be stable, clean, dry, and free of contaminants. If film-forming curing aids or form release agents are present on a concrete substrate, they must be completely removed. If non-film-forming curing or form release agents have been used, adhesion testing must be employed to determine if they would be
deleterious to adhesion. The rough surfaces of these substrates can be prepared by sandblasting, mechanically abrading, wire brushing, grinding, or any
combination of these preparation methods. These abrasive surface preparation procedures will introduce dust and other particles to the application area that must be treated as contaminants and thoroughly removed by blowing the affected substrate with oil-free compressed air or by brushing the contaminants away from the application area with a soft bristle brush.
Applying polyurethane sealant
After joint is verified to be clean, dry and free of contaminants, primer has been applied (if necessary), and the backing material has been properly installed, the application of urethane sealant may begin. The process of gunning sealant is completed by dispensing sealant from its packaging, through a nozzle, and into the sealant joint. Two considerations must be acknowledged when gunning the sealant:
1. The joint is to be filled from the backside to the front side. It is not recommended practice to fill the joint from front to back, as this introduces the potential for air to become entrapped within the ody of the sealant bead. If air becomes encapsulated within the body of the sealant bead, then the sealant joint may demonstrate
a reduced capacity to perform when exposed to dynamic movement.
2. Complete contact between the sealant and joint bonding surfaces of the substrate is required for the sealant to be expected to perform as intended when the sealant joint was designed. Substrate joint surfaces must be fully “wetted” with sealant, meaning that there must be contact between the urethane sealant and the substrate along the entire depth of the sealant-substrate interface. If the sealant does not fully contact the substrate along the bond line from the face of the sealant joint to the backer rod,
then there is assumed potential for the sealant joint to be ineffective at preventing leaks and/or fail prematurely when exposed to a load or stress. Some force exerted during gunning of the sealant may be required to accomplish full “wetting” of the sealant onto the bonding surfaces as tooling, alone, may not be sufficient to force the sealant fully into the joint.
Tooling is always a required step within the installation of a sealant bead to achieve an optimally performing sealant joint. Tooling the sealant joint will assist to create an installation that has full “wetting” of the sealant onto the joint interfaces, to achieve the desired hour-glass shaped cross-sectional joint geometry, and to shape the visible surface of the sealant joint to a clean and consistent appearance. The sealant joint should be deliberately tooled to a shape to actively shed water and prevent the ponding of water on the surface of the joint. Tooling can only be accomplished prior to the sealant achieving a skinned surface; once the sealant has begun to form a skinned surface, the joint can no longer be effectively tooled. Tooling is the process of applying consistent pressure to the sealant body through the exposed face of the sealant bead by running a rounded tip spatula along exterior surface of the sealant bead. A slightly concave surface at the exterior surface of the sealant bead is one characteristic of a properly tooled sealant bead. Pressure is applied by the applicator with the tooling spatula to the face of the sealant bead of a substantial enough magnitude to ensure the sealant is completely filled into the joint. The use of controlled force while tooling is a practice that is intended to provide additional assurance that the sealant has fully “wetted” the bonding interfaces of the substrates. The applied pressure is also effective in ensuring that the installed sealant has achieved complete contact with the backing material; care must be observed while tooling the joint to not introduce enough pressure to displace the joint backing material.
The practice of dry tooling is completed without the use of tooling agents, such as water, soap or detergent solutions. Sealant joints should be tooled to shed water and eliminate ponding.
Curing and adhesion development
The applied sealant bead must be left undisturbed until it has sufficiently cured to resist damage or deformation when contacted. The rate at which a one-component sealant will cure is heavily dependent on the environmental conditions, most notably temperature and relative humidity, that it is exposed to. The development of adhesion occurs more slowly than the cure-through which is why adhesion testing may require two or more weeks before executing.
What is Polyurethane sealant?
Polyurethane Sealant is a one-component, medium-modulus sealant that cures on exposure to atmospheric humidity. It possesses excellent adhesion to all typical construction materials such as cement based materials, brick, ceramic, glass, wood, galvanized and painted sheet iron and various plastics.
Is polyurethane sealant waterproof?
Polyurethane Sealant becomes rubber elastomer with good recovery after it cures. It expands after immersed in water to fill the gap, seal and waterproof. It has excellent performance in civil construction as waterproof material.
What is the difference between silicone and polyurethane sealant?
One of the principal differences between silicone and polyurethane sealants is the chemical composition. Silicone is an inorganic substance, while polyurethane is organic. The primary difference between organic and inorganic substances is the presence of carbon. For detailed information you could check our blog on sealant selection.
How to buy Soudaflex FC Polyurethane sealant ?
Soudalfex FC from Mccoy Soudal is easily avaialble in Mumbai. you can buy Mccoy Soudal products in Mumbai online at wholesale prices from Anagha Engineers. Call/