Which Waterproofer?

[JohnBoyII]

I want to repair a couple of patches on a roof felt thats otherwise sound. I found two tins in Wickes

1. Bitumen Roof Waterproofer - "a filled-in solvent based bitumen waterproofer"

2. Solvent Free Waterproofer - "an unfilled bitumen based waterproofer"

Whats the difference between the two as both claim to be bitumen based, and what does "filled-in" and "unfilled" mean?

What should I be using?

 

[jhonackerman]

Bitumen Roof Waterproofer is Mixed with a filler component such as limestone or sand. Polymers are added to the bitumen such as APP (atactic polypropylene) a plastic additive that gives rigidity and tear resistance, or SBS (styrene butadiene styrene) a rubber additive that gives more elastic benefits.Benefits include that they move with the structure and do not absorb water. Bitumen is a hydrocarbon and is created naturally from crude oil.Bituminous membranes protect insulation and can reflect harmful sun rays.Bitumen is not water soluble, non-biodegradable and does not release harmful toxins.

So go for Bitumen Roof Waterproofer

 

[JohnBoyII]

Thanks for that!

 

[WilliamEthen]

I think Bitumen Roof Waterproofer is a flat roof is a type of covering of a building. In contrast to the sloped form of a roof, a flat roof is horizontal or nearly horizontal. Materials that cover flat roofs typically allow the water to run off freely from a very slight inclination Solvent Free Waterproofed is a rubber/ bitumen liquid emulsion with excellent adhesion which dries to a tough black seamless, flexible waterproof and vapour proof membrane.