Sikaflex Pro Sealant 600ml Sausage Sandstone

Sikaflex Pro Sealant is a one component, thixotropic, polyurethane based joint sealant. It cures under the influence of atmospheric moisture to form an elastomeric material with adhesive properties, in some cases without the need for priming. It is an elastic joint sealant that is ideal for expansion joints, construction, walling, cladding, sealing penetrations and more. It is available in a wide range of colours to match architectural features, and skins in 2 - 4 hours under average conditions.

Features:

Ideal for:

APPLICATION

Surface Preparation:

Substrate must be clean, sound, dry and free of oil, grease and surface contaminants such as form release agents, curing membranes and hydrophobic water repellents. Thoroughly remove all loose particles and dust. Refer to Sika Pro priming guide for information on priming.

Placement:

Slide unipac (sausage) into the special applicator gun, then either nick the unipac wrapper at the extrusion end or cut off the very end of the sausage if it contains partially cured lumpy Sikaflex. Fit the gun with a suitable nozzle that has been cut to deliver the right bead size. All primer on joint sides, which is generally applied after backer rods or release tapes are in place, must have not exceeded its open time and it must be thoroughly dry and not just skinned over; otherwise in conditions of rising temperature trapped solvent can blow bubbles in the uncured sealant. Porous substrates such as poorly compacted or cracked concrete must have their porous bond area surfaces thoroughly sealed to avoid the possibility of air bubbles being blown into the uncured sealant if the substrate temperature rises.

Extrude the Sikaflex®-PRO into the joint ensuring that no air is trapped in the joint. Wide joints will require more than one pass of the application gun to make sure that Sikaflex®-PRO is in full contact with the sides and bottom of the joint.

Tooling-off the sealant will assist by forcing the sealant into the joint against its sides and back up material; this will also break any air bubbles and expose any air pockets.

Final tooling of the joint surface can be done effectively with a spatula dipped in a 20% solution of washing up detergent in water (test to ensure it does not discolour the cured Sikaflex®-PRO) or a profiled piece of raw potato. When tooling off with detergent solution, ensure no solution is allowed to get onto adjacent joint sides/bonding areas before the sealant.

Clean Up:

Use Sika Colma Cleaner to remove uncured sealant from tools after first removing the bulk of the Sikaflex material with a scraper followed by a rag or paper tissue. Sikaflex Hand Cleaner will remove fresh and partially cured Sikaflex. Hardened material can only be removed mechanically.

Minimum 12 months stored dry below 30°C unopened in original containers

Using a 600ml sausage, a 5 x 5mm joint = 24 linear metres of material. A 40 x 30mm joint = 0.5 linear metres of material. See technical data sheet for a detailed estimating guide.