FoamTack Pro Construct

Basic requirements

• The materials must be structurally sound and suited to the application. Verification and calculation of the load-bearing capacity of the structure is the responsibility of a suitably qualified and authorised professional.
• The materials used must be dimensionally stable in all dimensions and suitable for thin-bed adhesion, such as calcium silicate blocks (sand-lime bricks) of tolerance class T3 or aerated concrete blocks of class TLMB. 
• The application of FoamTack Pro Construct must comply with the processing instructions as described in the KOMO SKGIKOB certificate.014905.01.NL., which can be downloaded from the product page.
• The bottom layer (plinth course) is fully laid in a mortar bed using a plinth mortar matched to the compressive strength of the entire structure. The plinth course must be flat and accurately positioned. The additional bonding using FoamTack Pro Construct is done after the plinth-course mortar has cured (functional curing).
• As of 24 August 2023, appropriate training must be completed for the industrial or professional use of polyurethane-based products. Use in a well-ventilated area and wear appropriate personal protective equipment. 
   

Preparation – general work

• Check the materials for quality and dimensional stability. The surfaces must be clean and free of dust and ice. The bricks may be slightly damp (touch dry), but not soaked. Misting with water before or after applying the adhesive accelerates the reaction and promotes uniform cell formation on very dry bricks. The ideal can temperature is +20°C. 
• Protect any sensitive materials from spillages.
• Shake the FoamTack Pro Construct can vigorously for 30 seconds. Mount the can onto the Spray & PUR Gun. Adjust the control screw to make it easy to dispense the perfect bead of adhesive. Dispense from a height of about 1 cm and hold the gun at an angle of approximately 45 degrees. Dispense with a pulling motion. Shake the can regularly during use.
• Always brush the top of the previous layer and the bottom of the next block to remove dust and irregularities. For blocks up to 13 cm wide, apply one bead of adhesive; for wider blocks, apply two beads. 
• Place the next layer of blocks before a skin forms. The blocks should be stacked within 3 to 6 minutes of applying the adhesive beads, depending on temperature and humidity. If a skin forms due to waiting too long, the adhesive should be scraped off and fresh adhesive applied.
• When using blocks with tongue-and-groove joints, the vertical joints should not be bonded. For corner joints, custom-cut blocks or blocks without tongue-and-groove, the vertical joints must be bonded.
   

Applying DPC membrane 

• Brush the top of the plinth block to remove dust. Dispense two beads of adhesive, each 2 cm in size, onto the plinth block, then lay the DPC membrane. Wait 5-10 minutes to allow the first layer of adhesive to cure. Lay a new row of blocks directly on the DPC.
   

Bonding hollow quick-build blocks 

• Use only suitable, smooth-faced, calibrated rapid-build blocks and follow the manufacturer's application requirements. Walls must always be built according to best practice to achieve a straight structure in all planes.
• Dispense one or two beads of adhesive, 5 cm thick, along the entire length of the previous layer. Maintain a distance of 4-5 cm from the edges of the block. Place the next layer of blocks within 3 to 6 minutes of applying the adhesive beads (depending on temperature and humidity) and before a skin forms. 
   

Bonding solid blocks (aerated concrete, silicate blocks, sand-lime bricks, concrete blocks) 

• Use only suitable, dimensionally stable blocks recommended for thin, dry bonding. Use levelling profiles or a calibrated spirit level to ensure alignment.
• Dispense one or two beads of adhesive, each 2 to 3 cm thick, over the entire length of the previous layer. Maintain a distance of 4-5 cm from the edges of the block. Place the next layer of blocks within 3 to 6 minutes of applying the adhesive beads (depending on temperature and humidity) and before a skin forms. Gently tap the blocks into place with a rubber mallet within the working time.
   

Bonding plasterboard, furniture panels and rigid insulation boards 

• Apply adhesive in 2-5 cm beads, depending on the surface flatness. Wait before placement until the adhesive starts to form threads when touched (around 2 minutes). The adhesive now has enough tack to support the panels. Position the panels on the wall and keep in place for 10 minutes.
• Bonding to an existing wall: apply FoamTack Pro Construct evenly around the perimeter (5 cm from the edge) in a criss-cross pattern. 
• Bonding to a wooden, aluminium or steel support structure: apply FoamTack Pro Construct to the support structure.
   

Finishing and cleaning

• Cured after 30 minutes. Load-bearing and ready for finishing after 60 minutes.
• Remove uncured foam with Tec7 Spray & PUR Cleaner. Use the Spray & PUR Cleaner to clean the gun inside and out as well.
• It's best to keep any open can mounted on the Spray & PUR Gun. Close the valve completely and store upright with the gun at the top. A can stored like this can be reused for several weeks. 
• Foam may spray from the valve when the can is removed. Do this in a safe environment, pointing the valve away from people and sensitive surfaces.
• Clean your hands with Powerwipes. Scrape off any cured foam. Any remaining residue can be loosened with Remove All. 
• Does not bond to PE, PP or other closed-cell plastics. If in doubt, perform an adhesion test.