Rubberseal Trowel On Liquid Rubber is a water based, low-VOC, cold applied, seamless rubber membrane specifically designed for protecting and waterproofing various household and industrial items. It stretches and recovers to bridge and seal cracks, offers excellent adhesion, and resists water, salts, and sewer-gas environments — not for contact with fuels, oils, or solvents. Rubberseal installs easily by a trowel, quickly developing excellent film strength. Rubberseal Trowel On provides a sure seal, ideal for a durable waterproof solution in the most demanding service applications. Rubberseal may be used for: Roofs, Ponds, Fountains, Foundations, Drainage Systems, RVs, Gutters and many more.
| Weight | 11 lbs |
|---|---|
| Dimensions | 8 × 8 × 8 in |
| Gallons | 1 Gallon, 2 Gallons, 5 Gallons |
16 reviews for Rubberseal Black — Trowel Grade Sealant
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Trowel Grade
Shed Happens –
Wear OLD clothes
Emphasis on old.
A Human With A Roller –
What we needed
Crew used it around three penetrations. No drama.
Darnell –
Texture remained visible
My trowel marks didn’t disappear after curing. They don’t affect a buried foundation detail, but anyone using it in sight should finish more carefully than I did.
Dev C. –
Hard to spread cold
Warm it to normal working conditions first.
ToolboxTina –
Took more time than expected
Detailing eight penetrations sounded like a quick morning. It consumed most of the day because I wanted consistent shapes and thickness. Very satisfied, just tired.
PorchPirate –
Black smears travel
One dot on my glove became marks on the ladder, bucket handle, and door. Product works. Cleanup discipline needs work. Protect anything nearby that matters.
Bucket Enjoyer –
Great contrast on concrete
Black against concrete made every void visible. I could shape the detail, step back, and immediately see where another pass was needed.
NotAContractor –
A pro tool helps
Bought a flexible finishing trowel instead of using the rusty putty knife in my drawer. Worth every penny. Smooth pressure and clean edges made the product far easier to control.
RV_Tinkerer –
Messy first date
We did not get along for the first twenty minutes. I used too much material, the wrong tool, and no gloves. After switching to a narrow trowel, things improved dramatically.
just_fixing_stuff –
Container had plenty, maybe too much
My repair was smaller than my purchase. The material worked well, but I now own a lot of leftover black trowel grade. Calculate the detail volume, not the entire roof area.
Caleb D. –
Good on vertical
Didn’t slump down the wall while I worked it.
Anonymous –
Black paste
Black paste. Stayed put.
Project #37 –
Pro tip
Multiple small tools beat one large trowel on complicated details.
Ana-Luisa –
Good for a low drainage spot
Added controlled build to a shallow depression before applying the broader coating. Being able to shape the material was exactly what the repair required.
Ren M. –
Really black
Nearby stone needed more masking than I gave it.
DIY Homeowner –
Better than repeated thin fills
I needed meaningful build at one transition. A thick grade solved it in a controlled application rather than endless layers of something designed to roll.