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Cladco Universal Sealant Gun 300ml



In stock

Please note images may vary from actual item supplied due to lighting variations and camera angles

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Universal applicator gun for use when you purchase our silicone cartridge. Add this item to you order to avoid against that extra trip to the shops when you can’t find your old one. This gun has a cartridge cleaning pin to help keep the nozzle clear. Made of sturdy metal construction with a moulded handle and nozzle cleaning pin and is designed to carry our 300ml silicone cartridges.

Please note images may vary from actual item supplied due to lighting variations and camera angles

Total Price: £4.75

A caulking gun is an essential tool in every roofing kit. It can be used for a wide range of applications, perhaps most importantly for roof waterproofing with silicone sealant.


Our silicone sealant gun is strong and sturdy yet weighs just 347g, making it very easy to use with our silicone sealant. It features a pressed steel frame; handle with plunger; and release clip. Painted in an attractive blue and grey finish, this caulking gun will be easy to find in your kit. It is suitable for use with standard size 300ml tubes of silicone and caulk. The trigger fits comfortably in the hand with finger recesses that help keep the cartridge gun steady while using.


Using a caulking gun to apply silicone sealant is a good method for roof waterproofing at gaps in roofing sheets. When using filler strips at the eaves and ridges of a roof, it’s a good idea to bond it to the sheeting with a waterproof silicone sealant, also known as mastic sealant. Make sure you don’t leave any gaps for a complete seal. This simple step adds an extra layer of protection that can prolong the life of your roof. For more information, read our guide on eaves and ridge gaps.


Note: our roofing sheets are designed to be affixed with screws. Where sheets overlap, we recommend sealing the overlap using mastic lapping tape for roof waterproofing. Read our guide on laying sheets for more information on this.




Specifications of our caulking gun:


  • Caulking gun made from strong pressed steel
  • Ergonomic handle makes cartridge gun comfortable to use
  • Plunger and release clip prevent overspill
  • Cartridge gun fits 300ml tubes
  • Silicone sealant gun for use with adhesives, caulk etc.

PLEASE NOTE – Extra care should always be taken when handling metal sheets and flashings we advise using the correct type of Glove when handling or moving metal sheets and flashings. Gloves can be purchased on our website.

Please click on the variable options on our checkout page.

Nationwide Delivery service available for all items with a range of options. The table below shows available options and timescales for delivery.

Useful Links: Delivery Policy | Collection Policy


Nationwide Delivery estimated within 2 weeks (10 working days).

Scotland Delivery estimated within 2-3 weeks (15 working days).


Goods can be collected from Okehampton, Devon. Please allow 3-5 working days prior to collection.

Safety Advice

Please note for collection or delivery suitable safety equipment is required for the handling of materials.


Sample Packs 3-5 Working Days FREE
  Small Parcels
(Royal Mail)
3-5 Working Days £3.95
Small Box
(Parcelforce Standard)
3-5 Working Days £8.33
Large Box
(Parcelforce Standard)
3-5 working days £30.00
Nationwide Delivery
(Orders under £500)
Within 10 working days £192.00
  Nationwide Delivery
(Orders over £500)
Within 10 working days £96.00
  Nationwide Delivery
(Scotland Delivery)
Within 15 working days £360.00

Roofing items may be delivered on a pallet, as per the terms and conditions these are considered part of the packaging and will need to be disposed of by the receiver of the items. We are unable to remove this pallet after delivery.

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