actual plant trial the phenolic binder applicator in place was turned off and a second binder ring was hung below the normal binder ring a pressure pot containing a methacrylate based ultraviolet binder dymax light weld 186 was attached to the ring via hoses approximately 12 feet of full width uncured glass fiber material was collected on the ramp on a large piece of cardboard the actual sample was 12 feet long 12 inches thick and 5 feet wide the glass composition of the wool was normal product wool insulation such as those described in u s pat nos 2 877 124 and 2 882 173 a dymax pc 2 ultraviolet 365 nm lamp was used to cure the binder when the wool is photolyzed it glows from all sides top to bottom the light does not appear to have any problems penetrating the pack the intensity of the light coming through the bottom and out of the sides of the insulation was measured using a uvx radiometer with 365 nm sensor the light penetrating through the bottom was 1 of the incoming intensity and that from the sides was 2 7 of the incoming intensity the physical properties of this cured trial wool are compression at a 14 1 ratio for 5 min with a 15 min relaxation yields 65 deadpin recovery one sample was cured under the uv lamp with a round weight sitting on top of it it left an imprint on the top of the batt after approximately 2 weeks the imprint was still there this indicates that the wool can be cured to a specific shape and that the scattering of the uv light is efficient enough to allow curing under an opaque object ultraviolet radiation curing of insulation.