UniBond Outdoor Sealant Extreme Repair Cartridge White 389g

SKU: 388842

Product Description

UniBond Weather Guard Extreme Repair Sealant Adhesive and Filler Cartridge is the ultimate tool for all DIY needs. With its patented FLEXTEC technology extreme repair is a sealant, grab and filler all in one suitable for sealing joints, filling cracks and bonding most materials. The high performance formulation can be applied in any weather condition (even rain). So come rain or shine, it will guarantee you 35 years of strength and durability. It features all weather bonding and sealing of frame, roof and guttering, UPVC double glazing, external cladding, delicate surfaces (such as mirrors, polystyrene and marble) and bedding compound

To gain the perfect seal, surfaces must be dry and clean. Cut the tip off the cartridge above the screw thread. Remove the nozzle cap and trim the nozzle at an angle of 45 degree to the desired joint width. Screw the nozzle onto the cartridge and insert the cartridge into the gun. Apply by pulling the trigger. Smooth within 5 minutes to achieve a perfect finish. It protects the sealant from water and damp. It can fully dry in 24-36 hours depending on bead size, temperature and humidity. Coverage approximately 11 m with a 6 mm bead.

  • FLEXTEC technology - Extreme Repair is a sealant, grab and filler all in one.
  • Multi-Purpose - Can be used for interior and exterior use as can resist all weather conditions.
  • High Performance Formulation - It resists all weather conditions and is UV resistant.

Product Details

Drying time
Fully dry in 24-36 hours
Number of coats recommended
For interior or exterior use
Suitable for both interior & exterior use
Safety details
Avoid contact with skin and eyes. Keep out of reach of children.
For best results we recommend using a finishing tool to smooth the sealant

Delivery & Collection

Delivery and collection options are displayed on individual product pages allowing you to pick the most convenient option for you.

Standard delivery

Delivery from FREE

Our standard delivery service is available on most of our products. Delivery times will be displayed against individual products and your items will arrive within the number of days stated. For selected larger items our customer service team, or in some cases our suppliers, will contact you to arrange a suitable delivery date.

Terms and Conditions

Next & Named day delivery

Delivery from £6

You may be offered the option to choose a day for delivery that suits you. Costs may vary depending on the day you choose. Next day delivery will be available if you order before 2pm but restrictions do apply.

Terms and Conditions

Deliver to Store

Delivery £2

Sometimes it’s not always convenient to have items delivered to your home, so for selected products we offer the option to deliver them to one of our stores for you to pick up. This option will be presented to you in the checkout if available.

Terms and Conditions

Currently unavailable.

Click & Collect


For products in stock within a store, you can place a Click & Collect order online and our team will have your items ready for you to collect within 24 hours. For those items out of stock, we’ll try to offer you the option of it being be sent to a store of your choice, or to your home (at an additional charge) depending on your preference. Details will be available at checkout where available.

Terms and Conditions


For full details on returning items to Homebase please see our returns policy.

Products brought to you by concession partners

These products will be labelled within the product description and the concession partner will be named. Orders from concession partners are delivered directly from the concession partner and are excluded from our hassle free returns policy. For further information please visit our terms and conditions.

Deliveries from Suppliers

Some products may be delivered to you directly from one of our suppliers. These products will be labelled within the product description, please see our Terms & Conditions for more information.

Terms and Conditions


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