DOWSIL 784 Glazing Silicone Sealant is your complete solution for glazing. It's a one-part silicone sealant with superior adhesion to glass, aluminium, and other non-porous construction substrates. With fast curing time, it can become tack free in just one hour – perfect for areas that may be subject to extreme conditions.

What's even better? It contains a fungicide to resist mould growth – providing you with unbeatable mould protection you can rely on. Conforming to international ISO standard 11600-G-20LM, this glazing product can be used with peace of mind, knowing that its quality meets the highest standards. Keep your home protected against weathering and so much more with DOWSIL™ 784 Glazing Silicone Sealant

  • Contains a fungicide to resist mould growth
  • Fast cure - tack free in one hour
  • Resistant to UV radiation and temperature extremes
  • Conforms to ISO 11600-G-20LM

£4.99 Standard Delivery, or FREE on most orders over £99* (some exclusions apply)

£9.99 Next day delivery is available for orders places before 12 noon. Any orders placed for next day delivery after this time, will take 2 working days to be delivered.

Working/delivery days are Monday to Friday, deliveries will not normally be made Saturday or Sunday.

We offer a 30-day returns policy on on the majority of our items*, as long as the item is unused, undamaged and unopened**. We only ask that the postage is covered by yourself. 


* Please see our delivery page for further details on specific exceptions.

** Some products that are made to order or personalised cannot be returned.

***Exclusions apply for items shipped directly from our suppliers, and some big & bulky items may incur an additional charge. Please see our delivery page for full details. 

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Dow 784 Glazing Silicone Sealant

  • Now £8.91
  • (Delivery from £4.99 )
Item in Stock   |   Usually dispatched within 24 hours
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Free UK Delivery on most orders over £99
Delivery Rates & Information

Delivery Options

Standard Delivery: £4.99 - Free for all orders over £99.*
Next Day Delivery: £9.99 - Available for orders placed before 12:00 PM (Noon).

Important Delivery Notes

Next Day Delivery Cut-off: Orders placed after 12:00 PM (Noon) using Next Day Delivery will be delivered within two working days.
Working Days: Our standard delivery and shipping days are Monday through Friday. We do not normally deliver on Saturdays or Sundays.

Easy 30-Day Returns

We want you to be happy with your purchase! We offer a 30-day returns policy on all items, provided the following conditions are met:
  • The item is unused and undamaged.
  • The item is returned in its original packaging.
  • The customer is responsible for the return postage costs.

Combining Your Order

We always strive to combine your order into a single delivery. However, your order may arrive in multiple shipments if it contains:
  • Items from different warehouses (Standard items).
  • 'Direct' items (These are shipped separately and directly from the supplier) and will arrive separately from other items in your order.

*Exclusions & Additional Charges

The following items may be excluded from standard shipping rates or may incur extra delivery charges:
  • Items Shipped Directly from Suppliers ('Direct' items).
  • Certain Large or Bulky Items.
Want it by Monday 2nd November? Order within 22 hours, 33 minutes