⚡ Seal it fast, seal it smart — never miss a beat!
The 781 Black 310C by Sherwin-Williams is a professional-grade silicone sealant featuring a rapid 30-minute tack-free cure, flexible joint movement capability of ±20%, and a broad application temperature range from +5 to +40°C. Its compact 310C cartridge design weighs just 354g, delivering reliable, 100% recovery performance ideal for demanding sealing tasks.
| Manufacturer | Sherwin-Williams |
| Part Number | 3295257/C05 |
| Product Dimensions | 5 x 5 x 23.5 cm; 354 g |
| Item model number | 3295257/C05 |
| Size | 310C |
| Colour | Black |
| Style | Compact |
| Material | Silicone |
| Item Package Quantity | 1 |
| Usage | Professional |
| Included Components | 1 Cartridge |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 354 g |
M**N
Good
Perfect for my needs.
L**S
Without nozzle.
I know this is a top quality product but wish I’d bought from screwfix as it came without a nozzle. So if I never had one I wouldn’t be able to use it.
J**H
Nozzle missing
The tube was delivered without the end nozzle so unable to use
A**R
Flow
Always use Dow Corning, great flow and adhesion.
A**R
Easy to use
Colour is just what I expected (dark-ish grey) & it's pretty easy to use (same as most sealants out there if you've ever used one before). I used it to seal the gap between my worktop & the up-stand and it did the job perfectly.
K**.
Dowsil is Dowsil
Wouldn't use anything else, best Sealant make in my opinion
G**I
Excellent Product
A very good quality sealant, used to fill joint between light grey kitchen worktops and upstands. Colour match is amazing giving a seamless joint that is hard to see.
G**D
Great product
Stood the test of time
Trustpilot
5 days ago
3 days ago
