






🛠️ Fix it fast, fix it strong — your concrete’s new best friend!
QuestMark 2105 is a high-strength, dark gray epoxy mortar designed for professional-grade concrete floor patching and resurfacing. With a tensile strength of 6700 PSI and a pot life of 20-30 minutes at 70°F, it covers approximately 19.15 sq ft per 5-gallon unit at recommended thickness. This water-resistant, no-VOC formula cures to light foot traffic in under 14 hours and full heavy traffic in up to 7 days, making it perfect for durable, efficient floor repairs.











| ASIN | B08BX9MRB4 |
| Best Sellers Rank | #253,354 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #585 in Wall Surface Repair Products |
| Brand | QuestMark |
| Brand Name | QuestMark |
| Color | Dark Gray |
| Compatible Material | Concrete |
| Container Type | Pail |
| Customer Reviews | 3.9 out of 5 stars 36 Reviews |
| Full Cure Time | 2-7 Days |
| Item Form | Mortar |
| Item Package Quantity | 1 |
| Manufacturer | CentiMark Corporation |
| Material | Epoxy |
| Material Type | Epoxy |
| Model | 2105 |
| Other Special Features of the Product | High Strength, No VOC, 100% Solids |
| Special Feature | High Strength, No VOC, 100% Solids |
| Specific Uses For Product | Flooring, Masonry, Repair |
| Tensile Strength | 6700 Pounds Per Square Inch |
| Unit Count | 19.15 Square Feet |
| Viscosity | Moderate to High Viscosity |
| Volume | 5 Gallons |
| Water Resistance Level | Water Resistant |
S**Y
I don’t need anything thank you
Perfect thank
S**E
WHO is measuring this stuff??
Save your time and money and buy something else! I got a total of 4 of these-I bought 2, and the company (a long time ago) sent me one replacement, so that's the one star, for that one time I got customer service. I then bought another, for a total of 4. Here's my complaint: out of the 4 units I got, no 2 were alike in the measured amounts of the included 2 part epoxy. The first 2 had epoxy content that was off by a full 50% - one of the units had half as much "epoxy" as the other, and a way different amount of hardener as well. I actually got in touch with them that time, and they sent me another unit. THAT unit didn't match either one of the first 2. When I mixed the closest 2 together, it took OVER 10 days for the epoxy to cure- I could still push my finger into the surface at day 8. I never bothered to mix up the last one- I have NO idea what the actual ratio of part A and Part B is supposed to be, and there's no way to tell by comparing the 4 different units. I called their 800 number a total of 5 times across one week and left 5 messages, and got zero reply as of a month later.
Q**.
Easy to use.
Worked very well. Limited instructions though but since I knew what I wanted and how to use it I had no problems. Preparation is key. Now only time will tell how it holds up.
C**Y
Quick,easy
Finally got to use this product. Quite happy with results, goes on like playdough dries brick hard in one hour.
T**E
Works great
We used this to patch a couple bad spots in the concrete of our warehouse floor. Holds up well with heavy use.
S**A
Good product!
I used this product on my front steps. Looks good.
J**N
Not what I expected
Didn't realize I had to mix anything - was looking for product I could use a little at a time not the whole thing at one time. Not only 1 but 2 cans sent with a sand like product that needed to be mixed together. I didn't see any listing of how long it takes to start drying or completely dry - not even a time range estimate. In process of returning.
M**R
Waste of money
There is very little product in this bucket and the small amount we used does not get hard.
Trustpilot
2 months ago
3 weeks ago