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🪴 Lock your landscape in place—because your garden deserves the best!
Petra Max Rock Glue is a powerful, pet-safe, and non-toxic landscape adhesive made in the USA. This 32 oz bottle covers 50 sq ft and stabilizes gravel, pebbles, mulch, and organic materials by creating a water-permeable, erosion-resistant bond. Its fast-drying, blue-tinted formula ensures easy application and long-lasting hold, perfect for professional-quality landscaping around pathways, borders, and planting beds.








| Asin | B0CLT3JWK3 |
| Best Sellers Rank | #1,230 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #1 in Water-Based Adhesives |
| Brand Name | Petra |
| Color | White |
| Compatible Material | Rock, Sand, Gravel, Pebbles, Mulch, Wood Chips, Shells, Pine Straw, Hay and Straw, Leaf Piles |
| Container Type | Bottle |
| Customer Reviews | 4.0 4.0 out of 5 stars (2,508) 4.0 out of 5 stars |
| Full Cure Time | 48 hours |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Type Name | Rock Glue |
| Item Weight | 2.4 pounds |
| Manufacturer | Petra |
| Material Type | Lockscape Glue |
| Model | PM-2240 |
| Number Of Pieces | 1 |
| Other Special Features Of The Product | Concentrate, Fast Drying, Non Toxic, Safe for Pets, Strong |
| Part Number | PM-2240 |
| Specific Uses For Product | Landscape Adhesive;Erosion Resistance;Displacement Prevention;Gravel Stabilizer;Mulch Adhesive;Tree Area Application;Pathway Application;Planting Bed Application;Border Application;Slope Application |
| Unit Count | 32 Fluid Ounces |
| Upc | 810148640231 |
| Viscosity Level | Medium |
| Volume | 32 fluid ounces |
| Water Resistance Level | Water Resistant |
User
Good stuff
We have a lot of areas with 1/4-1/2 inch gravel stone that our dog loves to dig up. She does not do that anymore. It takes several coats, but this stuff works very well. As an added bonus, I like that it dries in such a way that it leaves the stones with a shiny wet look.It seems to take about a half day to dry one coat. Maybe faster if it’s hot or you have full sun.Go in knowing that this is not going to work with a single coat. I think I used 4-5 coats. It’s quite difficult to pry the stones up now.When it rains, the glue does liquify again. I would imagine in time it will degrade, but we’ll see.
User
It does work, just need to ask the right questions and apply it properly.
I just redid my side yard and had gravel put in around the walkway. The loose rocks drove me crazy so I purchased gravel glue - two 32 ounce bottles, along with the applicator. The first time, I screwed up the mix ratio and watered it down. The second bottle, followed the directions on the back and applied it correctly (I think) using their applicator, which I love!I Waited for it to cure and it held and it held well. I was happy. Then we were inundated with rain that lasted for three days. The glue held really well in the large sections of gravel, but not other sections - particularly between the pavers. It was as if I didn’t apply the glue at all. I didn’t understand what I did wrong as I had applied it evenly throughout. I knew that the application needed to be fixed/adjusted, and likely due drainage and moisture.I messaged the company with my questions. After sending them pictures, explaining the water to glue ratio I used, they recommended that, due to the heavy rain we’ve been getting, I try a 1:1 ratio, and apply 2-3 coats. I am going to do that when we are not expecting rain for a day or two. It’ll work - not concerned. Again, it held up in other sections, just not all.As for the glue - here’s a picture following my second application. I do like that it has a color to it when you apply it, but dries clear. The gravel against the house - large sections believe it or not - are the sections that held and the glue is still intact. With the exception of the gutters, there’s no overhang that gives that section shelter - so not sure why there it held, and not everywhere else. Again, I suspect drainage or moisture that may have existed before I applied, but that’s a guess.I would just make sure the area is completely dry, no rain expected for a couple of days, and if you live in an area that is experiencing a lot of rain, thicken the glue and apply 3 coats. Of course, you can always reach out to the company with any questions, and ask for guidance before you start the process. They are responsive and extremely helpful. Also, get their applicator! It’s easy to use and makes the application easier allowing you to evenly distribute it throughout sections.But I do want to give a shoutout to the Petra! I appreciated their responsiveness and their willingness to walk me through the steps, and come up with an alternative solution. A company that is willing to do that, without issue, is a good company to stand behind and support. I will definitely be a repeat customer.
User
$$$ for not working well
I followed the directions exactly when using Rockscape Rock Glue Max. I made sure the rocks were clean and dry, applied it as directed, and let everything cure well over the recommended timeframe. At first, it seemed to work pretty well. The pebbles were definitely staying in place much better than before, although I will say they never hardened together quite as strongly as I expected for such small rocks.For about the first week everything looked fine, even through hot temperatures. However, after we got one really heavy rain, it almost seemed like the glue partially dissolved or shifted. That surprised me because the product states it only takes a few days to fully dry/cure, and mine had already been sitting for over a week.Now, every time it rains, I can visibly see a white film or residue appear over the rocks and glue areas. Once everything dries again it looks mostly normal, but the pea pebbles are starting to loosen, shift, and wash out of place again. Unfortunately, I’m going to have to redo the entire area.I don’t have large landscaping stones I specifically used very small pea-sized pebbles so maybe this product performs better with larger rock. Based on my experience, though, it just did not hold up the way I expected it to, especially after rain exposure. I really wanted to love it because the reviews seemed overall positive, but for my project it unfortunately did not last.
User
Good one
I used Petra Max Rock Glue to stabilize decorative gravel and small landscape rocks, and it worked very well. The application was straightforward, and once dry, it held everything in place while still maintaining a natural appearance. I also appreciate that it's pet-safe and dries clear, so it doesn't affect the look of the landscaping. Great solution for reducing rock movement and keeping garden beds neat and tidy. Would purchase again.
User
Great product to keep your gravel walkway intact
This helps preserve my small landscape rocks and allows me to use my backpack blower without blowing the rocks into the grass or off the walking paths. It's very easy to clean out of my sprayer too. So far I have not had it clog my electric sprayer but I do rinse it out after every use. I usually respray every 3 months or so.
User
Didn’t work for us!
We used this product on a small walkway with pavers and small decorative rocks. We followed the instructions carefully, which were actually clearer than many of the other products we considered, so we had high hopes. Unfortunately, the adhesive didn’t perform as expected for our project, and the rocks didn’t hold in place. We eventually ordered a different product with a thicker consistency that worked better for our needs. This product may still work for other applications, but it wasn’t the right fit for ours.
User
Good stuff
Great stuff only works on small 1/2 “ or less stone . 2 coats gives a better protection
User
Review
I've used this on our patio edging and it works fabulouslyThe stone path is treated with the glue and I've had no trouble with the stones coming loose or even grass growing up through them. I did mix the glue a little more concentrated than recommended though
User
Unusable
Whole bottle was clumpy and unusableWaste of money
Trustpilot
2 weeks ago
3 days ago