Polypropylene sealant ?

[Charles in Aus.]

I have two preformed strip gutters to install in my driveway . They are a typical 120mm square drain with a grill top designed to carry surface run off away .
They come in four foot lengths that slot together and require a sealant .
I've spoken to the manufacturer who has been vague and next to useless , it seems they rely on the concrete surrounding it to act as a seal , something I'm not happy with .
I've tried silicon which is hopeless and Sikaflex pro plus , it sticks , but only just .
So a long shot ;
Can anyone suggest a way of sealing polypropylene to itself or PVC ?
At this point I'm even willing to give 'Weasel Juice ' a try .

 

[TerryfromSWIowa]

Do you have any scrap to try PVC glue on?

 

[wp6529]

Lexcel would likely work, however I agree with the manufacturer. Just bed it properly in concrete and be done with it, it's carrying rainwater not nuclear waste.

 

[Charles in Aus.]

Do you have any scrap to try PVC glue on?

Tried that Terry just peels off . Also abraded the surface and primed it with pvc etch fluid with the same result .

 

[Charles in Aus.]

Lexel isn't available here but I'm assuming it's a polycarbonate based sealer ? I will try the , thanks .
Yes it's only carrying water , but it's right next the a steel column footing holding up the 2nd storey of our home . I am installing it to try to stop this being undermined .

 

[MarkB_MI]

I think if Sikaflex won't stick to it, nothing will.

 

[Janicholson]

I have two preformed strip gutters to install in my driveway . They are a typical 120mm square drain with a grill top designed to carry surface run off away .
They come in four foot lengths that slot together and require a sealant .
I've spoken to the manufacturer who has been vague and next to useless , it seems they rely on the concrete surrounding it to act as a seal , something I'm not happy with .
I've tried silicon which is hopeless and Sikaflex pro plus , it sticks , but only just .
So a long shot ;
Can anyone suggest a way of sealing polypropylene to itself or PVC ?
At this point I'm even willing to give 'Weasel Juice ' a try .

Rubber gutter sealant self cures and might be a choice. Jim

 

[stevieb49829]

Butyl rubber windshield adhesive and sealant. Black, sticky, made to withstand the elements. Once you open the tube the leftovers don't last long.

 

[Watthour]

I think if Sikaflex won't stick to it, nothing will.

Not much adheres to PP or PE. 3M has some very specific adhesives for poly, but I don't recall their P/N or names. I had an adhesive for PVDF sheet which had to be heated (electrified caulk gun) before application that actually stuck it well.

 

[Tgrasher]

The silicone you used would leave residue that will inhibit anything else from adhering. Roughing would also help with adhesion.

 

[MJMJ]

So they “require a sealer” but the manufacturer won’t tell you want to use? Or are they designed to not use a sealer but you still want to use one?

You won’t find much that will truely adhere to PP. Anything that seems to hold will release once you have it installed. As long as its installed correctly its not possible for enough water to get through to cause issues. Its entire purpose is to carry water away.

 

[cwtech]

I'm assuming the gutter will be placed before the concrete is poured?

Would foil tape for duct seams applied to the outside of the gutter joints prevent, or deter, leakage?

 

[Check Break]

I have two preformed strip gutters to install in my driveway . They are a typical 120mm square drain with a grill top designed to carry surface run off away .
They come in four foot lengths that slot together and require a sealant .
I've spoken to the manufacturer who has been vague and next to useless , it seems they rely on the concrete surrounding it to act as a seal , something I'm not happy with .
I've tried silicon which is hopeless and Sikaflex pro plus , it sticks , but only just .
So a long shot ;
Can anyone suggest a way of sealing polypropylene to itself or PVC ?
At this point I'm even willing to give 'Weasel Juice ' a try .

Weld it.

https://www.forgeway.com/learning/blog/how-to-weld-polypropylene

 

[NDIHC]

When we were building our basement walls we sealed all of the joints with a Geocel adhesive sealant. It was some really tough and sticky stuff. After it cured you couldn't tear it at all. I see they have a product called Geocel 4600 Hybrid Structural Adhesive Sealant. They say it can be used on many surfaces including primed PVC, EPDM, vinyl and others. Might be worth a look. That company has a lot of other sealant products. Maybe they'd have something that might work?

 

[Charles in Aus.]

Follow up .
I received this along with further ' @r$€ covering nonsense from the company that produces these drains .
" While Sikaflex will provide an effective seal for a good period, it's important to understand that no sealant can permanently bond to polypropylene. Over time, the sealant may lose its effectiveness and may need to be reapplied to maintain a proper seal."
The information in their brochures and website still suggests that silicon is suitable , so much for consistency .
I will persist but most likely will need to place a water proof membrane under and around the bedding concrete of the drain .