some items are excluded from next day delivery
Get reliable, long-lasting sealing performance with Everbuild Tecnic Silicone 825, a professional-grade low modulus silicone sealant designed for construction, glazing, and external weatherproofing applications.
Formulated with a neutral curing, low odour system, it provides outstanding adhesion to both porous and non-porous surfaces—without the need for priming—making it a go-to choice for trade professionals.
Its flexible, non-slump formula allows for easy application on vertical joints, while extended tooling time makes it ideal for larger jobs and longer joints.
Designed for a wide range of building and construction uses:
Unlike standard silicones, Tecnic 825 is engineered for construction-grade performance. Its low modulus formulation ensures flexibility where movement occurs, while its neutral cure system prevents damage to sensitive materials.
Perfect for both internal and external use, it delivers a professional, long-lasting seal across a wide range of substrates—making it a reliable all-rounder for glazing, roofing, and building applications.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.