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🧱 Fix it fast, fix it flawless — your masonry’s new best friend!
SX Trade Strength Buff Mortar Repair Cement is a premium 300ml ready-to-use paste designed for small masonry repairs. Its water-resistant, high-viscosity formula adheres without primer to most surfaces, including damp ones, making it ideal for both interior and exterior pointing jobs. The cartridge system with a V-shaped nozzle ensures precise application, while easy water cleanup enhances user convenience. Perfect for professionals and DIYers seeking reliable, efficient masonry repair solutions.






| ASIN | B0CN3LC8QM |
| Best Sellers Rank | 608 in DIY & Tools ( See Top 100 in DIY & Tools ) 3 in Cement |
| Brand | Siroflex |
| Colour | Buff |
| Compatible Material | Concrete |
| Container Type | Cartridge |
| Country Of Origin | Netherlands |
| Customer Reviews | 4.1 out of 5 stars 1,229 Reviews |
| Included Components | 1 x SX Buff Mortar Repair Cement 300ml |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Type Name | Siroflex Mortar Repair Cement Buff 300ml |
| Item Volume | 300 Millilitres |
| Item form | Paste |
| Manufacturer | Siroflex Lte |
| Manufacturer Part Number | SXMORTRC300BU |
| Material | Acrylic |
| Model Number | SXMORTRC300BU |
| Number of Pieces | 1 |
| Other Special Features of the Product | Strong, Water Resistant |
| Special feature | Strong, Water Resistant |
| Specific Uses For Product | Masonry Repair |
| Specific uses for product | Masonry Repair |
| Unit Count | 300.0 millilitre |
| Viscosity Level | High |
| Water Resistance Level | Water Resistant |
M**N
Excellent stuff!
This stuff was excellent. Pretty easy to use and seemed to adhere well. Only time will tell so I’ll submit another review update in about 6 months. It was a good colour match for grey mortar and seems to have dried pretty quickly. The nozzle was wide enough for the mortar and all in all it looks decent for a novice. Pretty cheap for this sort of repair. Make sure you soak the tube in warm water before using as this really helps with easing the application. All in all it’s great!
C**.
Decent enough
Good enough although it could maybe do with a little more moisture through it in order to help stick to a dry surface. Easily rectified and other than that it does its job well enough.
M**E
Easy to use, all good 👍
If you have quite a small area to repair this is perfect, I read a review saying it was hard to squeeze out so I gave it a good squeeze and it shot out, so be carefull. I used it to grout / repair my patio, did a good job . All good . It's as thick as regular cement . It dried quite quickly. The colour is on the l8ghter side of buff. Easy to apply all good .
M**W
Leaves the tube easily
This product is great, I returned a similar product from another manufacturer as the cement was so thick it wouldn’t leave the tube. The consistency of this product is great, attached the gun and it came out free and easy, would buy again.
S**S
Mortar is badly mixed & impossible to apply.
Product is very dry, but has patches of more runny mortar, virtually impossible to apply, need both hands on the trigger and a very strong gun to apply or it will break, but then floods out for a few seconds. Colour isn't buff, its more like magnolia, very light.
B**N
Easy to use and solid quality, but colour match is critical
I bought this SX Trade Strength mortar repair to do some repointing work around my brick house. Application was easy and the mortar itself feels good quality once applied. It sets well and is ideal for small repair jobs where you don’t want to mix up a full batch of mortar. The main thing to be aware of is the colour. It’s quite a light grey, and in my case it didn’t match the existing mortar on my house. The repair stands out more than I’d like, and I’ll need to find a darker option in the future to blend it in better. Overall, the quality of the product itself emphasizes reliability, but matching the existing mortar colour is essential for cosmetic repairs. Good for structural or functional fixes, but be careful if appearance matters.
E**N
Good seal but a nightmare to squeeze out.
It seems to set quite nice and is basically like mortar but as its so firm and rigid in the tube you need to be like popeye to squeeze it out. Tube split eventually.
S**A
Seems good quality for 'Mortar in a tube'
Used this for a quick, inexpensive way to patch a crack in some rendering. It's survived the frost and rain, looks as good as it did when first applied
Trustpilot
5 days ago
3 weeks ago