Basecoat waterproofing too strong

[Suzanne12]

Hi, the basecoat on my render is too strong and its not letting topcoat grip and stick. The topcoat keeps sliding off and im at wits end, any advice to get topcoat to stick would be greatly appreciated!

 

[ChrispyUK]

Hack it off

 

[Elite exteriors]

Slurry some weber rend aid up and paint it on or try micro gobeties it's a parex product either should do it

 

[smoother09]

 

[Retired Spread]

Sika Rendagrip?

 

[bobski]

Hi, the basecoat on my render is too strong and its not letting topcoat grip and stick. The topcoat keeps sliding off and im at wits end, any advice to get topcoat to stick would be greatly appreciated!

Sbr slurry, splatter on, almost like a tyrolean

How is the basecoat currently finish keyed?

 

[Suzanne12]

Hack it off

Its stuck solid to brickwork so can't hack it off ☹

 

[Suzanne12]

Sbr slurry, splatter on, almost like a tyrolean

How is the basecoat currently finish keyed?

Yes its keyed finished

 

[Suzanne12]

Slurry some weber rend aid up and paint it on or try micro gobeties it's a parex product either should do it

Its the waterproof thats too strong and not allowing top coat to stick and making it slide, would your recommendations still work?

 

[ChrispyUK]

Its stuck solid to brickwork so can't hack it off ☹

was joking...sorry

 

[Mouldyoldspudgun]

How thick is your top coat?

 

[Suzanne12]

How thick is your top coat?

Its 4mm

 

[Elite exteriors]

Its the waterproof thats too strong and not allowing top coat to stick and making it slide, would your recommendations still work?

Yes rend aid sticks to anything it's brilliant I think micro gobeitis would be fine too

 

[Mouldyoldspudgun]

Its 4mm

I really can’t see why it’s slumping unless you wet the scratch coat down to much

 

[SmoothCriminal]

how unearth is the waterproofer too strong.. how did that happen

 

[malc]

wind up.
if it properly scratched how can 4mm top coat slump?

 

[bobski]

wind up.
if it properly scratched how can 4mm top coat slump?

I think OP said sliding.

We had it with Sika over 20 years ago, very waterproof albeit insufficient key - too light.

Stippled it with 1 to 1 and 1 to 1, sbr, water, sand, cement.

Let that set, no probs.

 

[Smooth criminal]

how unearth is the waterproofer too strong.. how did that happen

Should have gone to spec savers

 

[SmoothCriminal]

Should have gone to spec savers

Dina get it