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Gunuo Tianjin Industrial Co.,Ltd.
GNS 900 Roof and Gutter Sealant
Update time: 2015-6-20

Water resistant
Good UV & weather resistant 
Superior Flexibility



GNS Roof and Gutter Sealant is an one part, non corrosive neutral cure sealant, which has very good UV and weather resistant, superior adhesion to a wide range of surfaces, resulting in a lasting finish. It has a 25 years guarantee against crumbling, cracking or drying.


For metal (aluminum, copper, brass and zinc) and tile roofing
All metal lap-joint waterproofing
Colorbond roofs and fences
Rigid PVC and most plastics including polystyrene
Skylights, canopies and general glazing
Guttering and flashings
Vents and downpipes
Weatherproofing caravans and trucks


?Throughly clean and dry surface from oil, dirt and grease. Allow to dry completely before applying silicone. 
?Cut the seal at the top of the cartridge and cut the nozzle at a 45° angle, to the size of the gap opening. Screw the nozzle to the top of the cartridge.
?Place the cartridge into a caulking gun 
?Hold the caulking gun at a 45° angle. Press the nozzle opening against the joint, apply steady pressure to the caulking gun and extrude the silicone sealant forcing the sealant into the gap and move in a pushing motion, along the joint in one smooth action.
?For a smooth finish, smooth with a finger dipped in mineral turpentine.
?Excess sealant must be cleaned up before the sealant skins in 5-10 minutes.
?Remove tape before the sealant skins. Clean tools immediately in mineral turpetine.
?Avoid smearing on surrounding surfaces
?Sealant will cure fully in 48 hours. As this point any unwanted sealant can be removed by trimming with a sharp blade, but avoid under cutting the seal.


Not recommended for use as a plug for burst pipes or below waterline applications.
Can not be painted over.
Not for use on polyethylene, polypropylene or Teflon. Pre-test plastics before use.


12 months from manufacture date when store in cool dry locations below 25°C, the sealant should be used within 6 months after opening.


Translucent, grey, black, brown, manor red, navy, white. Contact us for special colours.


Uncured silicone can irritate eyes and skin. If contact is made with eyes, flush with water for 15 minutes and seek medical advice. Use in well ventilated area and keep out of reach for children.

Key words : Roof and Gutter Sealant