# Silicone Sealant 781 – Dow Corning

Dowsil 781 is a one-part, silicone sealant, which has excellent adhesion to a wide range of non-porous surfaces, including glass, aluminium, painted surfaces and composite boards. It is fast curing and offers excellent resistance to ageing, shrinkage, cracking and discolouring.

**Applications**

Suitable for glazing Applications, weather sealing of sheet cladding, curtain walls, draught proofing and general internal sealing Applications.  

**Benefits**

-   High modulus – acetoxy cure type
-   Fast cure – tack-free in 30 minutes
-   Working time of 5-10 minutes
-   Conforms to ISO 11600-F&G-20LM
-   100% recovery
-   Excellent weatherability
-   Application Temperature Range +5 to +40°C
-   Joint movement capability +/– 20%
-   Size: 310ml

## Details

- **Price:** 9.87 GBP
- **Vendor:** GEOCEL (G47F)
- **Type:** Sealants
- **Tags:** Black, Brown, Building Materials, Chemicals, Clear, National, Sealant, Sealants & Adhesives, White

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Brown | 9.87 GBP | In stock |
| Clear | 9.87 GBP | In stock |
| White | 9.87 GBP | In stock |
| Black | 9.87 GBP | In stock |

## Images

- Dow 781 acetoxy silicone sealant tube for building and DIY applications
- Dowsil 781 white silicone sealant tube for building and DIY applications
- Silicone Sealant 781 – Dow Corning

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> Source: [Carvers Building Supplies](https://www.carvers.co.uk/products/silicone-sealant-brown-781-dow-corning)
> Updated: 2026-06-23