Techniseal Structure Bond PU PASTE Polyurethane Adhesive- 29 Ounce
Up To Three Times The Strength Of Conventional Adhesive, With A Permanent Overnight Bond
Structure Bond PU Paste is a high strength, high solids, low VOC polyurethane adhesive. Techniseal rates it at up to three times the strength of conventional adhesive, with a permanent bond overnight so the job moves on the next morning. It adheres to wet and frozen surfaces, resists water and frost, and the non shrinking formulation makes it usable for gap filling and shimming rather than just bonding flat faces.
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3x Conventional Strength High strength, high solids polyurethane |
Overnight Bond Permanent bond, faster project completion |
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Wet And Frozen Surfaces Resists water and frost |
Non Shrinking Suitable for gap filling and shimming |
Why Contractors Ask for Structure Bond PU Paste by Name
Two things slow a hardscape build: waiting for an adhesive to cure, and discovering the substrate is not flat enough to bond against. This product is aimed at both.
- Up to three times the strength of conventional adhesive. That is Techniseal own figure, and it is a high strength, high solids polyurethane formulation.
- Permanent overnight bond. The wall you build today can be worked on tomorrow, which changes how a multi day build gets scheduled.
- It adheres to wet and frozen surfaces and resists water and frost once cured, so damp or cold conditions do not stop the job.
- Non shrinking, so it fills gaps and shims. That is unusual and genuinely useful. An adhesive that shrinks leaves a void behind exactly where you needed support.
- Long open time. Techniseal calls out flexibility in repositioning, which on heavy stone is the difference between a straight course and a fight.
- Smooth extrusion. Easier dispensing means less hand fatigue across a full day of wall building.
- Low VOC, and rated for normal and humid installation areas.
Structure Bond PU Paste Specifications
| Product Type | High strength polyurethane paste adhesive |
| Base | Polyurethane |
| Container Size | 29 oz |
| Strength | Up to 3 times conventional adhesive |
| Bond Time | Permanent overnight bond |
| Surface Conditions | Bonds to wet and frozen surfaces |
| Shrinkage | Non shrinking, suitable for gap filling and shimming |
| Open Time | Long, allowing repositioning |
| VOC | Low VOC, high solids |
| Installation Areas | Normal and humid |
| Approved Substrates | Clay pavers, natural stone, brick, concrete pavers, and most substrates |
| Manufacturer | Techniseal |
Yield depends on bead size and on how much of the material is going into gap filling rather than a running bead. Gap filling consumes considerably more than a flat bonded joint, so estimate against your actual assembly.
Where Structure Bond PU Paste Works
Reach for PU Paste when strength, speed, or an imperfect substrate is the constraint.
- Retaining wall construction where next day progress matters
- Bonding onto uneven or irregular substrates that need gap filling
- Shimming and leveling stone and block
- Cold and damp weather construction
- Cap stones and coping on walls and pools
- Structural landscape features and columns
- Mixed substrate assemblies
- Repairs where the surface cannot be dried first
Where Structure Bond PU Paste Should NOT Be Used (Straight From the Manufacturer)
This is a paste adhesive, not the high yield canister foam. For long runs of bonding at volume, the Structure Bond canister system with the Gun II dispenser yields far more per unit.
For vertical veneer where sag resistance is the priority, StickyStone is formulated for that specific problem.
Bonding to wet and frozen surfaces does not remove the need to clear loose material, dirt, and ice buildup first.
Read the technical data sheet and safety data sheet for cure times, temperature limits, and protective equipment before you start.
Not sure if your project qualifies? Call or text us at (856) 418-4895 before you order. We will give you a straight answer, even if the answer is that this is not the right product for your job.
How to Install Structure Bond PU Paste
Follow the official Techniseal instructions, linked below. This is the shape of the job:
- Clear the bonding surfaces of loose material, dirt, and ice buildup.
- Load the tube into the appropriate dispenser.
- Apply the adhesive in the pattern the technical data sheet specifies, using extra material where gap filling or shimming is needed.
- Set the unit into position. The long open time allows repositioning if the course needs adjusting.
- Check alignment along the course before the adhesive begins to set.
- Allow the overnight cure before loading the assembly.
The non shrinking property is what makes gap filling reliable here. Where a substrate is out of true, build the adhesive up rather than forcing the stone down onto a high spot.
Quick Answers
How strong is it really?
Techniseal states up to three times the strength of conventional adhesive, from a high strength, high solids polyurethane formulation.
When can I work on it again?
It produces a permanent bond overnight, which is what makes it suited to multi day builds.
Can I use it in the cold or rain?
It adheres to wet and frozen surfaces and resists water and frost. Clear ice and loose material first, and expect cure times to extend in cold weather.
Can I use it to fill a gap?
Yes. The non shrinking formulation makes it suitable for gap filling and shimming, which most adhesives are not.
How is it different from the Structure Bond canister?
The canister is a high yield polyurethane foam for long runs, needing the Gun II dispenser. This is a paste in a tube, focused on maximum strength, gap filling, and overnight bonding.
Is it low VOC?
Yes, it is a low VOC, high solids formulation.
Official Techniseal Documentation
Documents are published by Techniseal and open in a new tab. Every sheet we carry is also listed in our TDS and SDS library.
Pairs Well With
- Techniseal Structure Bond canister and Gun II for high volume linear bonding
- Techniseal StickyStone for vertical veneer work
- Techniseal WR7 to waterproof the finished masonry
Order before our daily cutoff and your Structure Bond PU Paste ships today from New Jersey.
Questions about your project? Call or text (856) 418-4895 and you will get a real person who works with hardscape adhesives every day.
Not sure how many 50 LB bags of polymeric sand your paver project will need? Try our Polymeric Sand Calculator