Trying to get render to actually stick on those annoyingly smooth surfaces? We’ve been checking out the Everbuild Rendagrip, a red bonding agent that claims to sort out common rendering headaches. It’s a polymer-based product loaded with fine aggregate particles to give render something to bite onto.

Rendagrip cuts down the porosity of base substrates and gives a mechanical key thanks to its gritty texture. What’s genuinely handy: you can slap it on damp surfaces, since it’s waterproof.

Everbuild Rendagrip bonding agent in red bucket

It’s decent on concrete, lightweight blockwork, and brick. People really like the single coat application—you just brush it on, let it dry, and get on with rendering.

That said, the red colour can peek through lighter renders if you don’t cover it properly. The 10-litre tub covers a fair amount, but honestly, it might be overkill if you’re just patching up a garden wall.

Most feedback says it works well across different surfaces. Main gripes? The price, and sometimes those hefty buckets arrive a bit battered.

Bottom Line

 

Everbuild Rendagrip is a solid choice if you’re struggling with render adhesion on tough surfaces.

Its waterproofing and single-coat ease make it a practical pick for most exterior jobs.

Thinking about tackling that rendering job? Check out Everbuild Rendagrip here and see if it makes your life easier!

Overview: Everbuild 507 Quick Drying Rendagrip Extra Grip Render Bonding Agent

 

This bonding agent is made for those annoying smooth or tricky surfaces that just won’t hold render. The formula’s packed with fine aggregate to give a gritty, textured key for better adhesion.

Key Benefits:

  • One-coat application – just let it dry, then render
  • Works on damp surfaces thanks to waterproofing
  • Reduces substrate porosity so render doesn’t dry out too fast

 

The 10-litre red tub is good for medium jobs. Most reviews are positive—4.5 stars from 119 people, apparently—especially for concrete, lightweight blocks, and brick.

Since it’s polymer-based, it stands up to weather better than the old-school stuff. Some folks do grumble that the red can show through pale renders if your coverage isn’t solid.

Weirdly, it’s only 1kg even though it’s 10 litres, so it’s not as heavy as you’d expect. Storage is easy enough, but you’ll want a decent stirrer—those gritty bits settle pretty fast.

Improved Adhesion on Smooth Substrates

 

Slick surfaces can be a nightmare for render. The 507 Quick Drying formula uses a polymer base to create a textured grip layer that actually works.

Key adhesion perks:

  • Makes a mechanical key on glossy stuff
  • Sticks to painted walls and smooth concrete
  • Helps stop render from failing

 

The red colour isn’t just for show—it helps you see where you’ve covered, so you’re less likely to miss a spot (and regret it later).

Plenty of users mention way better bonding on surfaces that used to be a pain. The quick drying is a bonus—less waiting around. You do need to mix it well, though, or you’ll get clumps.

The polymer base just seems to grab onto non-porous surfaces better than the old stuff. Great for modern building materials that don’t play nice with regular bonding agents.

Coverage is generally reliable if you prep the surface and apply it right. Don’t skip the basics, though—prep still matters.

Enhanced Grip and Bonding Performance

 

Adhesion really matters if you want your render to last. The 507 Rendagrip uses fine aggregate to create a mechanical key, and it does the job well on smooth bases.

It’s good at sorting out the usual bonding problems—reducing porosity and suction on concrete and lightweight blocks, so render doesn’t just fall off later.

Bonding highlights: • Better adhesion for tricky surfaces • Mechanical keying from the aggregate • One-coat application saves hassle • Handles damp surfaces thanks to waterproofing

This extra grip formula works on various outdoor surfaces, from brick to concrete. Just remember, the key is in that gritty aggregate—miss a spot and it won’t work as well.

Most users say it’s sorted out issues on previously stubborn, smooth walls. It does work on slightly damp surfaces, too, but as always, prep is king for best results.

One Coat Application Ease

 

Getting even coverage with bonding agents can be a faff. 507 Rendagrip keeps things simple with its one-coat setup.

Most folks can just brush or roll it on in one go, then move on to rendering after it dries. Definitely a time saver compared to stuff that needs layers.

Application perks:

  • Single coat does the trick
  • No need for a second round
  • Ready for render once dry

 

The thick texture means it sticks where you put it, not down your arm. Less mess, less waste.

But, if you skimp or miss spots, you’ll pay for it later. Consistent coverage is key. The red colour helps you spot any gaps before it sets.

Waterproof Application for Damp Surfaces

 

One big plus: you don’t have to wait for everything to dry out before using this stuff. Most similar products make you wait for bone-dry conditions first.

Since it’s waterproof, you can apply it to damp concrete, brick, or blockwork and not worry about it peeling off. That’s a relief when you’re racing the weather.

Damp surface bonuses:

  • No waiting around for things to dry
  • Works in humid conditions
  • Less chance of delays from rain or damp

 

Just don’t go overboard—if it’s dripping wet, you’re asking for trouble. Damp is fine, but not soaked.

Once on, the waterproof layer helps keep moisture away from the base, giving a bit more confidence in the final bond.

Reduced Surface Porosity and Suction

 

This stuff really helps with high-suction surfaces. The polymer formula seals up porous bases before rendering.

Why it matters: • Gives a more even surface for render to stick • Stops fresh render from drying out too fast • Cuts down on failed render jobs

It’s especially good on concrete blocks, brick, and other thirsty masonry that usually suck the moisture out of render. That’s often why render cracks or falls off.

People are reporting fewer problems with cracking or poor adhesion when they use this first. The bright red makes it easy to see where you’ve been, too.

But don’t forget, you still need to prep the surface. It won’t fix issues caused by dust, grease, or loose material that should’ve been cleaned off first.

User Experience and Handling

 

Using Rendagrip is pretty straightforward, whether you’re a DIYer or a pro. It pours out of the 10-litre tub without making a huge mess.

Application details: • Ready to go right out of the bucket • Brush or roller both work fine • Dries quickly, so you’re not waiting all day

The red pigment is a genuine help—you can actually see where you’ve covered, so you’re less likely to miss a spot.

Consistency-wise, it’s thick enough to cling to walls but not so gloopy that it’s hard to spread. The big tub is great for larger jobs but can be a pain to lug around when full.

Heads up: • Tub can get awkward for overhead stuff • Strong chemical smell—ventilate! • Dries fast, so work in small-ish sections

Cleanup isn’t bad—just rinse tools with water before it dries hard. Wait too long and you’ll be scraping.

Pros and Cons

 

Let’s be honest: no bonding agent is perfect. Here’s what stands out with Rendagrip, good and bad.

Pros

 

The extra grip formula (with those fine aggregates) gives a solid mechanical key for smooth surfaces like concrete or blockwork. That’s a real plus for tricky jobs.

Why people like it:

  • Single coat means less faff and labour
  • Can be used on damp surfaces—super flexible
  • Reduces suction and porosity headaches
  • Works on lots of external surfaces—brick, blocks, etc.

 

Quick drying means you’re not standing around waiting for ages. Compared to some alternatives, it definitely speeds things up.

The waterproofing is a real bonus if you’re working in unpredictable weather.

Cons

 

But, it’s not all sunshine. The 10-litre tub is a bit much for small jobs—you might end up with leftovers that go to waste.

Things to watch out for:

  • Only comes in red—no subtle options
  • Needs proper storage to stay effective
  • Coverage varies a lot depending on how porous your surface is

 

If your render is light, the red might peek through unless you’re careful. Sometimes you need a thicker render coat to hide it completely.

Like other water-based products, keep it away from freezing. And since the aggregate settles, you’ll need to give it a proper stir before using. Not a deal-breaker, but worth knowing.

Customer Reviews

 

Real users have chimed in with their thoughts across 119 reviews. The Rendagrip gets a lot of nods for its strong adhesion—it just sticks where you want it, and honestly, that’s what you’re after, right?

What customers love:

  • Dries quickly, so you’re not left waiting around for ages
  • Grip strength is impressive—renders don’t budge
  • Application feels straightforward, even if you’re not a pro
  • Decent value, especially when you stack it up against other brands

 

Common concerns:

  • The smell is pretty strong, so you’ll want to crack a window
  • If you lay it on thick, that red tint might peek through lighter finishes
  • Some folks were a bit surprised by how thick the mix was

 

Most people seem happy to recommend this for both tradespeople and folks tackling home projects. That 4.5-star average isn’t too shabby—buyers generally feel it does the job for render bonding, and that’s what counts in the end.

Conclusion

 

After putting the Rendagrip bonding agent to the test, I'd say it really does offer solid performance for render applications. The quick-drying formula is a genuine timesaver, and honestly, the extra grip makes a noticeable difference when you want adhesion to just work across different surfaces.

The 10-litre tub is generous—definitely enough for medium or bigger jobs, so you’re not running out mid-project. The only thing that bugged me a bit: the red colour can peek through lighter renders if you’re not careful with the application.

Key strengths:

  • Dries quickly (seriously, it’s fast)
  • Really solid bonding
  • Big container—less hassle with refills

 

Potential drawbacks:

  • The red tint might mess with your finish if you’re not paying attention
  • Costs a bit more than the no-frills options out there

 

All in all, this seems right for contractors or DIY folks who just want something reliable and effective. The 4.5-star rating feels fair—it works well, but the price might make some people hesitate if they’re counting every penny.

If you’re after dependable render bonding and need things done quickly, Rendagrip gets the job done. In my opinion, the consistent results are worth the extra spend.