Can this sealant be applied to wet or damp surfaces such as inside a plastic gutter? If not anything else suitable?

Yes it can. I've used this on a gutter joining bracket that was full of water, the join on one side would keep separating, I put this underneath with water still in the gutter and holds together nicely and no leak.

Is this good and strong to seal black felt loft lining under tiles?

I would leave your felt alone especially if its brittle. If you have a leak you need the tiles fixing. There is not much you can do from underneath. If you have a leak near the edge at the bottom part of the apex, I would consider a roofer removing the bottom row & re-bedding the tiles. Replacing the felt for a modern equivalent. This all depends on your roofing tiles.

how long does this take to dry and can it be overpainted with plastic gutter paint

It wouldn't paint as it stays tacky. Everbuild clearfix would be better if you want to paint it. Clearfix skins over in approx 30 minutes.

Can this be used to attch pigeon spikes to roof tiles?

No I wouldn't think so, it is very runny. Plus this was used to stick a guttering downpipe. It did work, but now leaks again.

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Everbuild Everflex Roof and Gutter Sealant – Butyl-Based Sealant and Adhesive for Roofing – Excellent Weathering Properties – Black – 295 ml

Everbuild Everflex Roof and Gutter Sealant – Butyl-Based Sealant and Adhesive for Roofing – Excellent Weathering Properties – Black – 295 ml

Product ID: 48422502

Details

Brand
Everbuild
Item dimensions L x W x H
49 x 49 x 230
Item weight
0.49 Kilograms
Material
Synthetic
Style
Black

🖤Sleek black finish

🌧️Weatherproof in heavy rain

🛠️295 ml precision cartridge

$24.23

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Description

🖤 Seal smart, stay dry — the ultimate roof and gutter guardian.

SEMI DRY FLEXIBILITY - Remains permanently plastic under a surface skin, adapting to roof movements without cracking.
EFFORTLESS APPLICATION - Compatible with standard caulk guns for a smooth, mess-free seal every time.
UNIVERSAL SURFACE GRIP - Bonds seamlessly to bitumen, metal, wood, slate, and more—one sealant to rule them all.
ALL WEATHER RELIABILITY - Seals perfectly even in heavy rain, so your roof stays protected come rain or shine.
LONG LASTING PROTECTION - Butyl-based formula ensures durable, weather-resistant sealing that stands the test of time.

Everbuild Everflex Roof and Gutter Sealant is a 295 ml butyl-based adhesive designed for permanent, weather-resistant sealing on a variety of roofing materials including bitumen, metal, wood, and slate. Its semi-dry, flexible formula ensures durability and adaptability in all weather conditions, including heavy rain, making it an essential tool for professional-grade roof and gutter maintenance.

Specifications

ASIN	B003OVCCU8
Best Sellers Rank	17,011 in DIY & Tools ( See Top 100 in DIY & Tools ) 367 in Sealers
Brand	Everbuild
Colour	Black
Compatible Material	Metal, Wood, Bitumen
Customer Reviews	4.3 out of 5 stars 3,757 Reviews
EU Spare Part Availability Duration	1 Years
Global Trade Identification Number	05029347000172
Included Components	Everbuild Roof & Gutter Sealant, C3 Cartridge, Black - ROOF
Item Dimensions	49 x 49 x 230 millimetres
Item Form	Paste
Item Type Name	Everbuild Roof & Gutter Sealant, C3 Cartridge, Black - ROOF
Item Weight	0.49 Kilograms
Item dimensions L x W x H	49 x 49 x 230 millimetres
Item weight	0.49 Kilograms
Manufacturer	Sika Everbuild
Manufacturer Contact Information	Sika Everbuild 41 Knowsthorpe Way, Leeds LS9 0SW
Manufacturer Part Number	6115-BL
Material	Synthetic Rubber
Model Number	EVBROOFBL
Number of Items	1
Number of Packs	1
Style	Black
Style Name	Black
Surface Recommendation	Gutter,Roof
Unit Count	1.0 millilitre
Water Resistance Level	Water Resistant
Water resistance level	Water Resistant

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$24.23

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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