Dow Dowsil Corning Firestop 400 Sealant White 380ml (SKU: 22045)

Versatile and ready to use, the Dow Corning firestop 400 acrylic sealant is ideal for pointing around the inside of door and window frames to keep the integrity of fire walls. It can also be used on the linear joints in fire rated walls as it swells under high temperatures and produces a fire and smoke-resistant seal.



This paintable water-based sealant offers good adhesion to a wide variety of substrates without any need for a primer. Resistant to mildew, mould and UV, you know it’s built to last. Plus, it’s tack free in only 30 to 45 minutes, so you won’t delay the rest of your project waiting for it to dry, either.

We offer free delivery on orders over £300 with no minimum order requirements to customers near our network of branches. Standard delivery is 2-3 working days. Our standard delivery fee is £15. To find out if we can deliver to you please enter your postcode when prompted. If you need more help please contact your local branch. Once you have placed your order one of our team from your local branch will be in touch to arrange a delivery date for you. We offer free next day delivery on smaller postable items such as screws, gloves and some tools on orders over £50. A postage cost of £5 applies for orders below this. These items can be delivered nationally by our trusted delivery partner DPD to most mainland UK addresses. We endeavour to ship all orders within 24hrs of receiving the order. Please see our delivery page below for further details.

If you’d like to return your goods, or part of your goods, please contact your local Elliotts branch to arrange this. Returns are accepted if defective or damaged (please contact us) or if the product is returned in new/unopened condition. Please see our returns page below for further details.