Everflex Premium 335 Construction Silicone Sealant - White

£8.00 £6.67
In stock
Only 16 left

Everflex Premium 335 Construction Silicone Sealant

Quantity: 1 x C3 Cartridge 
Colours Available: White, Trans, Brown, Bronze, Black, Grey, Toffee. 

Everflex 335 construction sealant is a low modulus, reactive curing silicone sealant that cures quickly to reduce dirt pick up.  It remains permanently flexible, forming a weather tight rubber-like seal.  Silicone 335 has been tested to ISO8339 and ISO10590/10563.

• Faster curing than conventional low mod sealants.
• Extremely low dirt pick up.
• Flexible - movement accommodation of +/- 25%.
• Waterproof seal    
• Contains a powerful anti fungal compound to prevent mould growth.    

Areas For Use
• Sealing around PVCu profile, trim and cladding.
• Perimeter pointing to PVCu, timber and metal window and door frames.*            
• Weathersealing to pre-formed panels and formwork.            
• Glass to glass and glass to aluminium weathersealing.
• Cap glazing and remedial glazing sealing.
• General draught proofing..

• Not for use in conjunction with bitumen, or asphalt.
• Do not use on lead or soft metals.
• On highly porous surfaces such as new concrete, priming is advised.
• 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 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. Thermal movement of PVC-u frames can be excessive. This product accommodates movement of +/- 25% of the joint width. 
• Overpainting is not possible.

Surface Preparation
All surfaces must be clean, dry and dust free.  All loose or flaking surface coatings, and old sealant and mastic joints, should be removed before application.  Glass, metal and aluminium should be cleaned with a proprietary solvent cleaner prior to application for optimum adhesion.  Porous surfaces may require priming - a small area should be tested first.

Installation Instructions for Everflex Premium 335 Construction

Tools/Products Required:
Everflex Premium 335 Construction Silicone Sealant
Caulking Gun.
Silicone Smoother + Water.
Backer Rod. 

Step 1 – Cleaning Surfaces: 
Surfaces need to be clean, dry, sound and free from contamination. NOTE: Soap or residue will stop the silicone from adhering.

Step 2 – Preparing Surfaces: 
Where gaps are 6mm or wider, insert a joint of closed cell Polyethylene foam backer rod, approximately 25% over sized, allowing for a seal depth of at least 10mm. If necessary you can mask around the perimeter allowing you to remove any messy silicone after application.

Step 3 – Preparing Caulking Gun: 
Insert the sealant cartridge into the skeleton gun. Snip the nozzle at a 45 degree angle using a sharp blade as any ragged edges will reflect in your silicone. Don’t snip the nozzle too large, this will make it very difficultly and messy when applying.

Step 4 – Applying Sealant: 
Pressure the gun trigger so that a smooth constant bead of silicone comes out, adjust your speed of travel to ensure a uniform bead goes down. Remember not to put too much silicone down as it will spread as you smooth it.

Step 6 – Smoothing: 
Wet the silicone smoothers and tool to get the right shape, adjusting any mistakes made when applying the sealant. Now is the time to also remove any masking tape used.

Joint Width:
Where gaps are less than 6mm wide, apply a bead of sealant and tool to form a triangular fillet, achieving a ‘bite’ of at least 6mm onto non-porous surfaces ( PPC, aluminium etc) and 10mm onto porous surfaces (brickwork etc).
Minimum 6mm.
Maximum 25mm.

Joint Depth: 
Depth ratio (within above min/max restrictions) 2:1 butt joints. 1:1 lap joints.

More Information
Brand Everbuild


ean 5029347000028
Best Seller No
Recently Added No
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Delivery & Returns

Delivery & Returns

Delivery Information - What does your delivery option mean?

All deliveries are subject to stock and availability.

UK Mainland

**Next Day Cut Off – subject to cleared payments and passing of payment security checks by 11am.

Orders processed after 11am using the next day service option cannot be guaranteed.

All UK Mainland orders qualify for FREE delivery* when you spend over £150 ex VAT. *Please note certain items do not qualify for free delivery. 

Consignments will be delivered using DX, DPD, APC, Hermes or direct from the supplier if stock is not readily available within our warehouse.

Please note that orders placed on a Friday after 11AM for next day delivery will be dispatched on the following Monday for delivery on Tuesday.

Orders placed prior to a Bank Holiday will be delivered two days after the Bank Holiday.

Delivery Options

Price (inc vat)


Next Day Delivery


Monday - Friday, excluding public holidays. Order before 11AM for delivery the next working day.

2-7 Working Day Delivery 


Monday - Friday, excluding public holidays. 

FREE Delivery over £180 (2-7 Working Days)


Monday - Friday, excluding public holidays.

Unfortunately, We Cannot Guarantee Next Working Day - you will be notified if we can't fulfill this. 

Outside UK Mainland (Including Ireland)

*Please note the following postcodes are classed as Non-Mainland UK or Remote / Rural delivery: AB, IV, KW, PA, PH, HS, KA, ZE, PO30-PO41, IM, JE, GY, BT, TR21-TR25.

Regardless of the order weight and quantity, the following locations incur a carriage charge of £24.99 INC VAT


It is advised you arrange your own courier collection from our warehouse. If you require assistance Dortech Direct can schedule a delivery for you. Prices are dependent on box quantity and order weight. Please call our sales team for a quotation on 0330 1281212.

Please Note

  • All available delivery options will be displayed at checkout / basket pages
  • Working days do not include Weekends or Bank holidays
  • For all enquiries ring 0330 1281212 / sales@dortechdirect.co.uk

BACS & Purchase Orders

  • The delivery times & dates are only valid from receipt of funds or valid PO number


By ordering with Dortech Direct you agree to inspect goods upon delivery. Damaged goods should be rejected. If you notice damage after goods are delivered, you must report this to us within 48 hours of delivery. Dortech Direct does not accept damage liability for issues reported over 2 working days from the point of delivery.

You can report damage by sending your order details and images of any issues to sales@dortechdirect.co.uk


If you need to return a product within 14 days, we are happy to refund the product provided it is returned, as sold, with all the original packaging, tags, labels and accessories.

Prior to returning any goods for any reason, please fill in the Returns Form and put it in your package that you are returning. 



Is there a re-stocking fee?

Please note some orders are subject to up to a 35% restocking fee. While every effort will be made to avoid this charge in some cases it is un-avoidable.This charge represents the administrative time and overheads to reprocess the stock. 

I've sent my package, how long will the refund take?

We aim to make the returns process as quick as possible, but please allow up to 14 days for your refund to be processed. If you haven't received any information after this time, please get in touch with one of our team.