Can I use Dunlop Primer and Additive for plastic?

[charlie0123]

Shower floor is usually concrete, which is porous surface, while puddle flange is plastic, which is non-porous. I was wondering if Dunlop Primer and Additive can be used for both of them. Otherwise I have to buy different products for the shower base. I ask this question because I saw Bunnings' waterproofing video which seems only one product is used (https://www.youtube.com/watch?v=TmrFUgI1C58) . Dunlop's label shows the product is for porous surface.

[Jewelleryrescue]

Hi @charlie0123 

The dunlop Primer used in that vidoe is  designed to allow the water proof to readily stick to the concrete and other materials as its dust is bonded in and bound some what.

It will also bond to the plastic to allow the same water proofing process to bond better with the plastic fittings So the water proof layer wont peel of later,

So  just follow the video as bunnings made it. 

[charlie0123]

Thanks.

Puddle flange is ABS plastic. What about Polyurethane hobs like this one https://adheseal.com.au/products/polyurethane-hobs

[Jewelleryrescue]

Hi @charlie0123 

I think those  glues are basically formulated around those plastics so it is good at bonding to them and creates easy to bond to membrain  surfaces on other  materials  as well.

[MitchellMc]

Hi @charlie0123,

The puddle flange is adhered and sealed to the concrete/compressed fibro. The Dunlop primer is painted around it and over the porous surfaces. The waterproofing is applied over the primer and up to and around the puddle flange. You then apply your screed over the area, if needed, and tile. There's no need to apply the primer or waterproofing over the puddle flange, only up to it.

For a polyurethane hob, it would be best to contact the manufacturer for more advice on what they recommend for preparation.

Please let us know if you have further questions.

Mitchell