Lanco Roof and surface Membrane Sealant (Elastomeric Silicone - Acrylic based) for sealing surfaces in a monolithically way. Designed for concrete surfaces, metal, wood, asphalt membranes and EPDM. May be applied with roller, brush or spray - airless. 78% Solar reflectance. 90% Heat reduction.
Magma develops within the mantle or crust when the temperature-pressure conditions favor the molten state. Magma rises toward the Earth's surface when it is less dense than the surrounding rock and when a structural zone allows movement.
The initial composition of the magma is dictated by the composition of the source rock and the degree of partial melting. In general, melting of a mantle source (garnet peridotite) results in mafic/basaltic magmas. Melting of crustal sources yields more siliceous magmas.