
The Everbuild Range of EVERFLEX SILICONE 335 Construction sealants are 310ml sized cartridges, that are available in 5 colours, brown, white, transparent, grey and black. All these colours will fit most common mastic or sealant guns. 355 is a low modulus, reactive curing silicone sealant that cures quickly to reduce dirt pick up. EVERFLEX SILICONE 335 remains permanently flexible, forming a weather tight rubberlike seal. Tested to ISO 8339 and ISO 10590 / 10563 and has a faster curing time than conventional low mod sealants with an extremely low dirt pick up. It is also flexible and waterproof giving a good sound seal for a professional finish. Everbuild 355 contains a powerful anti fungal compound to prevent mould growth and will cover a great range of applications like:Sealing around PVCu profile, trim and cladding, perimeter pointing to PVCu, timber and metal window and door frames, weather sealing to preformed panels and formwork, glass to glass and glass to aluminium weather sealing, cap glazing and remedial glazing sealing and also general draught proofing. * Not for use in conjunction with bitumen, or asphalt. Use WEATHERMATE SILICONE* Do not use on lead or soft metals. Use LEAD MATE SILICONE.* On highly porous surfaces such as new concrete, priming is advised or use SILICONE 450.* Not for use on substrates that may bleed oils, solvent or plasticisers.* Do not use in the vicinity of, or in conjunction with, the edge sealant of double glazed units. Use SILICONE 450.* Use on uPVC and plastic components: Due to the wide variety and quality of these materials, the user must always carry out an adhesion test prior to use. For optimum adhesion, use SILICONE 600 or SILICONE 450. Thermal movement of PVCu frames can be excessive. This product accommodates movement of ± 35% of the joint width. For a higher movement factor use SILICONE 600 or SILICONE 450. When perimeter pointing to G.G.F standards, use only SILICONE 450 neutral cure. * Overpainting is not possible, so on applications where overpainting is required, use WEATHER MATE isoacrylic sealant (external only) or MIRROR MATE (internal or external use).1 x Everbuild 335 Construction Silicone Black 295ml
Overpainting is not possible, so on applications where overpainting is required, use WEATHER MATE isoacrylic sealant (external only) or MIRROR MATE (internal or external use).1 x Everbuild 335 Construction Silicone Black 295ml
49p delivery on all orders over £30 (exc. Bulky Item Delivery)
Super Saver Delivery
£2.99
Standard Delivery
£3.99
Express Delivery
£5.99
Next Day Delivery
£6.99
24/7 InPost Locker | Shop Collect
£2.49
Evri ParcelShop
£3.99
Evri ParcelShop | Express Delivery
£5.99
Premium DPD Next Day Delivery
£7.99
Bulky Item Delivery
£4.99
Northern Ireland Super Saver Delivery
£2.99
Northern Ireland Standard Delivery
£4.99
Northern Ireland Express Delivery
£5.99
Unlimited free delivery for a year with Unlimited Delivery for £14.99
Please note, some delivery methods are not available for products delivered by our brand partners & they may have longer delivery times
Something not quite right? You have 28 days from the day you receive it, to send something back.
Please note, we cannot offer refunds on fashion face masks, cosmetics, pierced jewellery, adult toys, and swimwear or lingerie if the hygiene seal is not in place or has been broken.
Items of footwear and/or clothing must be unworn and unwashed with the original labels attached. Also, footwear must be tried on indoors. Items of homeware including bedlinen, mattresses, and toppers, and pillows must be unused and in their original unopened packaging. This does not affect your statutory rights.
Click here to view our full Returns Policy.

The Everbuild Range of EVERFLEX SILICONE 335 Construction sealants are 310ml sized cartridges, that are available in 5 colours, brown, white, transparent, grey and black. All these colours will fit most common mastic or sealant guns. 355 is a low modulus, reactive curing silicone sealant that cures quickly to reduce dirt pick up. EVERFLEX SILICONE 335 remains permanently flexible, forming a weather tight rubberlike seal. Tested to ISO 8339 and ISO 10590 / 10563 and has a faster curing time than conventional low mod sealants with an extremely low dirt pick up. It is also flexible and waterproof giving a good sound seal for a professional finish. Everbuild 355 contains a powerful anti fungal compound to prevent mould growth and will cover a great range of applications like:Sealing around PVCu profile, trim and cladding, perimeter pointing to PVCu, timber and metal window and door frames, weather sealing to preformed panels and formwork, glass to glass and glass to aluminium weather sealing, cap glazing and remedial glazing sealing and also general draught proofing. * Not for use in conjunction with bitumen, or asphalt. Use WEATHERMATE SILICONE* Do not use on lead or soft metals. Use LEAD MATE SILICONE.* On highly porous surfaces such as new concrete, priming is advised or use SILICONE 450.* Not for use on substrates that may bleed oils, solvent or plasticisers.* Do not use in the vicinity of, or in conjunction with, the edge sealant of double glazed units. Use SILICONE 450.* Use on uPVC and plastic components: Due to the wide variety and quality of these materials, the user must always carry out an adhesion test prior to use. For optimum adhesion, use SILICONE 600 or SILICONE 450. Thermal movement of PVCu frames can be excessive. This product accommodates movement of ± 35% of the joint width. For a higher movement factor use SILICONE 600 or SILICONE 450. When perimeter pointing to G.G.F standards, use only SILICONE 450 neutral cure. * Overpainting is not possible, so on applications where overpainting is required, use WEATHER MATE isoacrylic sealant (external only) or MIRROR MATE (internal or external use).1 x Everbuild 335 Construction Silicone Black 295ml
Overpainting is not possible, so on applications where overpainting is required, use WEATHER MATE isoacrylic sealant (external only) or MIRROR MATE (internal or external use).1 x Everbuild 335 Construction Silicone Black 295ml
49p delivery on all orders over £30 (exc. Bulky Item Delivery)
Super Saver Delivery
£2.99
Standard Delivery
£3.99
Express Delivery
£5.99
Next Day Delivery
£6.99
24/7 InPost Locker | Shop Collect
£2.49
Evri ParcelShop
£3.99
Evri ParcelShop | Express Delivery
£5.99
Premium DPD Next Day Delivery
£7.99
Bulky Item Delivery
£4.99
Northern Ireland Super Saver Delivery
£2.99
Northern Ireland Standard Delivery
£4.99
Northern Ireland Express Delivery
£5.99
Unlimited free delivery for a year with Unlimited Delivery for £14.99
Please note, some delivery methods are not available for products delivered by our brand partners & they may have longer delivery times
Something not quite right? You have 28 days from the day you receive it, to send something back.
Please note, we cannot offer refunds on fashion face masks, cosmetics, pierced jewellery, adult toys, and swimwear or lingerie if the hygiene seal is not in place or has been broken.
Items of footwear and/or clothing must be unworn and unwashed with the original labels attached. Also, footwear must be tried on indoors. Items of homeware including bedlinen, mattresses, and toppers, and pillows must be unused and in their original unopened packaging. This does not affect your statutory rights.
Click here to view our full Returns Policy.
Extend your warranty and protect your purchase against accidental damage and defects.
Protects your new 335 Construction Silicone Black 295Ml against breakdowns and faults once the manufacturer's warranty period is over.
Covers issues not included in your manufacturer's warranty, such as accidental damage or theft.
Get a replacement or a cash refund up to the full amount you originally paid for it.
FAQs
XCover is an authorised protection provider for Debenhams, with over 7 million customers globally and an average 4.7 out of 5 stars from thousands of reviews on Google and Trustpilot. XCover's simple, fast and stress-free repair and replacement process delivers peace of mind if your item is stolen or it has damages or defects that aren't covered by the manufacturer's warranty.
XCover's simple, fast and stress-free repair and replacement process delivers peace of mind if your item is stolen or has damages or defects that aren't covered by the manufacturer's warranty. XCover’s easy, digital process is simple with quick payouts on approved claims.
Before submitting a claim, you need to gather all the details and documents to support your claim. This helpful article has a guide to what documents you may need based on your claim reason.
When you're ready to submit your claim, log in to your XCover Account, select the XCover Protection you would like to claim for and then select ‘Make a Claim’.
The XCover claims process is quick and hassle-free, with payment or reimbursement for approved claims processed instantly. The dedicated team at XCover aims to complete 95% of claims within 3 days of claim submission, so keep a close eye on your emails to ensure there’s no delay.
For more information about claims submission, please check XCover Help.